No full-text available
To read the full-text of this research,
you can request a copy directly from the authors.
DIVERSITY, DISTRIBUTION AND ABUNDANCE OF BENTHOS IN MOURI RIVER, KHULNA, BANGLADESH
... Thus, the study of benthic organisms and their community structure is important (Noman et al. 2019). Some previous researches were conducted on macrobenthic community from Bangladesh coastal waters such as estuarine macrophytes diversity in mangrove in Cox's Bazar (Abu Hena et al. 2013), occurrence and abundance of macrobenthos in Hatiya and Nijhum Dwip (Asadujjaman et al. 2012), diversity of fish fauna and their status, conservation (Ali et al. 2014), seasonal and spatial distribution of macrozoobenthos from Meghna river estuary (Hossain et al. 2009), intertidal macrobenthic fauna and their relations with environmental variables in Karnafuli estuary (Islam et al. 2013), diversity, distribution, and abundance of benthos in Mouri river, Khulna, Bangladesh (Khan et al. 2007), recent study on cage culture effects on macrobenthic community in Dakatia river (Tania et al. 2020), and spatial and seasonal distribution of intertidal macrobenthos with their biomass and functional feeding guilds in Naf river estuary Bangladesh (Noman et al. 2019). However, none of the previous studies have focused on mangrove-associated macrofauna. ...
... Asadujjaman et al. (2012) studied the abundance of macrobenthos and found the density of macrobenthos ranged between 4511 inds./m 2 to 433 ind./m 2 in Hatiya and Nijhum Dwip island. Khan et al. (2007) recorded the average density of benthos 630-1040 inds./m 2 in Mouri river, Khulna which was supports the result of the present study. Tania et al. (2020) also reported huge number of macrobenthos in monsoon reason. ...
... The station-wise diversity indices, number of taxa (S), number of individuals, Dominance (D), Shannon-Wiener diversity index (H ' ), and Margalef richness index (J ' ) value are presented in Table 3. Shanon-Wiener diversity (H ' ) index value of benthic infauna ranged from 0.8 to 1.323 (Table 3). The Shanon-Wiener (H ' ) index value from Khan et al. (2007) and Sarker et al. (2016) was almost close to the present study. However, Pawar (2015) reported a very low diversity value (0.203 t0 0.332) from the heavily polluted area which reveals that macrobenthic community was under stress conditions. ...
Rahman MDH, Hossain MB, Habib A, Noman MDA, Mondal S. 2021. Mangrove associated macrobenthos community structure from an estuarine island. Biodiversitas 22: 247-252. Macroinvertebrate living on or around the mangroves has not been or less investigated in Bangladesh. This study was carried out to describe the density, distribution, and community structure of mangrove associated macrobenthos in Nijhum Dwip, central coast of Bangladesh. A total of 17 taxa were identified belonging to mainly Polychaetes (67.37%), Mysids (23.53%), Isopods (3.83%), Amphipods (0.58%), and Gastropods (0.29%). Polychaetes were dominant by contributing 67.37% of total macrobenthos. The number of benthic fauna ranged from 359 to 1617 inds./m2 with a mean value of 1003.93± 400.3 inds./m 2 There was no significant difference observed (p > 0.05) in the abundance of macrofauna among the stations. The maximum Shannon-Wiener Index (H’) of species diversity was found at St2 (1.323) and the lowest at St4 (0.8) in the monsoon period possibly due to high rainfall and disturbance of benthic habitat. The Shannon-Wiener diversity values suggest the area was less polluted. The information from the present study can be used to measure the impacts of pollution to conserve biodiversity in sustainable manner.
... Besides, a huge portion of the country's total fisheries production comes from this area every year. Though there are many types of research on the benthic community, diversity and abundance (Khan et al. 2007;Hossain et al. 2009;Asadujjaman et al. 2012;Abu Hena et al. 2013;Islam et al. 2013), a very few research (Sarker et al. 2016) held on the assessment of pollution, and there are no records of research on this issue in Sitakundu. ...
... Seven major groups of macrobenthos were identified wherein Polychaeta was the most dominant group comprising more than 60% of the total macrobenthos on an average. It is evident from most of the regional macrobenthos study that Polychaeta dominated this area all the year round (Khan et al. 2007;Asadujjaman et al. 2012;Noman et al. 2018). The abundance of macrobenthos was much higher in April (6541.67±1292.25 inds./m 2 ) in this area than June (1275±736.04 ...
... The S-W diversity index value at the ship-breaking area varied from 1.49 to 1.85 while in the reference area it was higher and ranged between 2.48 to 2.55. Noman et al. (2018) found the S-W index ranged from 1.05 to 1.67 while Khan et al. (2007) reported that the diversity varied from 1.20±0.23 to 1.49±0.753. Similarly, observed in Hatiya and Nijhum Dweep island diversity fluctuated from 1.22 to 1.49. ...
Lipi JA, Noman MDA, Hossain MB, Abu Hena MK, Idris MH. 2020. Effects of ship-breaking activities on the abundance and diversity of macrobenthos in Sitakundu Coast, Bangladesh. Biodiversitas 21: 5085-5093. To articulate the ecological processes or anthropogenic impacts, it is necessary to explore various distributional patterns of benthic communities. The study was conducted to investigate the variability of macrobenthos between a ship braking and non-ship-breaking area along the Sitakunda coast, Chittagong, Bangladesh. This is the first comprehensive study that addresses the effects of ship-breaking activities on the variability of benthic communities in the study area. Macrobenthos were sampled from two different regions namely Bhatiary (ship-breaking area) and Banshbaria (non-ship-breaking area/reference area) in two different time periods (April and July) for comparative analyses. During the study period, Polychaeta was the most dominant group comprising 60% of the total macrobenthos all over the study area. Macrobenthos abundance and diversity demonstrated strong spatial variability. The mean abundance varied from 3799.75±3452.28 ind./m 2 to 4107.25±2743.6 ind./m 2 from the ship-breaking to non-ship-breaking area. Similar to macrobenthos abundance, the diversity index (H′) (varied between 2.45 and 1.85), species richness (D) (varied between 1.99 and 1.04), and the number of taxa (varied between 17.25 and 9.25) were higher in the non-ship-breaking area compared to the ship-breaking area. Multivariate analyses, nMDS, and CCA plot showed a distinct grouping for different location. Besides, the diversity indices of the Polychaeta community, and the presence or absence of several pollution indicator taxa revealed that Bhatiary (the ship-breaking area) was confronting deleterious effects of ship-breaking activities.
... Benthos are macro invertebrates benthic organisms monitoring of aquatic habitats macro zoo benthos has of soft mud, sand and bottom habitats in the water as well important contribution [7]. as the interspersed patches of aquatic vegetation and Benthos are responsible for the change of aquatic oyster shell, support the wide variety of fauna and flora environment by this way they serving as promoting and essential part of the coastal ecosystem for the aquatic indicators of hydrologic stress and for the development production [1]. Benthos are found in the bottom of of the health of aquatic ecosystem [8]. ...
... samples were taken into a round transparent Petri The oligochaetes which are fresh water annelids display dish (diameter 15 cm and depth 2 cm) and placed on the greatest diversity and have the greatest indicator a white paper background for the easy contrast of value [1]. Macro benthos play an remarkable contribution vision. ...
... In the present study, total number of macrobenthos 9322 indi./m was found.Total number of polychaeta 7819, 2 Oliogochaeta 619, crustacea 664, Bivalve 176 and Gasropoda 44 indi./m were identified which are more 2 coincides with findings of Sakri [23]. The number of macrobenthos was higher than the findings of Khan [1] where [26] found polychaetes (56%). ...
Study was conducted in the estuarine waters of Meghna River Ramghati, Laxmipur, Bangladesh during the period of December, 2015 to February, 2016 with a view to exploring macrobenthic community structures and relating with water quality parameters. Sediment samples were collected by using Ekmandrege. Eight families were identified under five groups of macrobenthos. Maximum number (3358 indi./m) of 2 macrobenthos were found in Nereidae family where minimum (44 indi./m) in Echuiridae family. Rest were 2 Capitellidae (310 indi./m), Syllidae (400 indi./m), Mysidae (177 indi./m), Lumbrinereidae (666 indi./m), 2 2 2 2 Goniadidae (1021 indi./m) and unidentified (2858 indi./m) were recorded. Five macrobenthic groups (Taxa) were 2 2 identified where number of Polychaeta (7819 indi./m) was highest in each month and Gatropoda (44 indi./m) 2 2 was lowest. Others were Bivalvia (176 indi./m), Crustacea (664 indi./m) and Oligochaeta (619 indi./m). Water 2 2 2 quality parameterswere measured in each stations where the range of temperature,salinity, pH and dissolve oxygen were 22.7±4.0 to 22.6±3.08°C, 7.33 ± 0.58 to 6.50 ± 0.50 ppt, 7.33 ± 0.76 to 6.80 ± 0.20 and 10.5±1.2 to 9.5 ± 0.76 mg L respectively.
... A lot of studies have been performed on coastal macrobanthos of Bangladesh [10][11][12][13][14][15][16]. However, studies on benthic macro invertebrates in freshwater ponds of Noakhali district, Bangladesh are scanty. ...
... However, higher number of benthic groups than the current study has also been confirmed by Hossain, 2009 who recorded 20 taxa of macro-zoo-benthos of Meghna River estuary of which Oligochaetes, Polychaetes and Mesogastropods were dominant [16]. Moreover, lower number of macrobenthic groups than the current research was also reported by Nupur et al. 2013;Khan et al. 2007;Ahmed et al. 1991 andSharma et al. 2015 [11, 22-24]. Nupur [22,11]. ...
... Moreover, lower number of macrobenthic groups than the current research was also reported by Nupur et al. 2013;Khan et al. 2007;Ahmed et al. 1991 andSharma et al. 2015 [11, 22-24]. Nupur [22,11]. ...
The composition and abundance of benthic macro-invertebrates in freshwater fish ponds of Noakhali region were analyzed for a period of six month (December-May, 2012). Experimental ponds were categorized as culture, household and derelict and samples were drawn every week during the entire study period using an Eckman grab with dimension of 15.2×15.2×15.2 cm. A total of 10 major groups/taxa were identified viz.; Polychaetes, Oligochaetes, Gastropods, Amphipods, Bivalve, Diptera, Crab, Isopods, Prawn larvae and Copepod. Total macro-benthos abundance was recorded 1555.54, 1466.66 and 2177.79 ind. / m2 respectively in culture, household and derelict ponds. Oligochaetes were found dominant (49 -75%) in all the experimental ponds. Density of Oligochaetes was recorded 888.89, 1088.89 and 1066.67 ind. /m2 respectively in culture, household and derelict ponds. The overall composition of macro-benthos was Polychaetes (9.19%), Oligochaetes (58.56%), Gastropods (19.23%), Amphipods (3.85%), Bivalvia (1.50%), Diptera (1%), Crab (0.43%), Isopods (0.43%), Prawn larvae (0.21%) and Copepods (0.85%). The present study reveals that macrobenthic fauna and their density are variable among the freshwater ponds. The obtained information can be used for further analysis of seasonal variation of macrobenthos, conserve biodiversity and seasonal change of water quality parameter of freshwater ponds.
... Annelids were present. Khan et al., in 2007 also reported that molluscan communities were dominant at River Mouri and Roy and Gupta in 2010 were observed these species in dominant condition in River Barak. Shannon diversity at this station is 1.44 shows poor diversity conditions. ...
... Absence of Annelids and only Gomphus species from phylum Arthropoda was recorded from this station. Several studies were done at different river systems and higher molluscan diversity was reported (Fisher and Williams, 2006;Khan et al., 2007 andRoy andGupta 2010). Shannon diversity index of this station is 1.99 shows poor diversity condition of macrozoobenthic fauna due to construction of water intake point. ...
... Present investigation is supported by the above findings ( Figure 4). Khan et al., (2007) reported abundance of benthic community in individuals/m 2 in Mouri River, Khulna, Bangladesh. ...
Rivers support vast biodiversity of flora and fauna, provide food and shelter to organisms that thrive in.
Macrozoobenthos play an important role in aquatic ecosystem as primary and secondary consumers and form the
trophic relationships include those that feed on them directly or indirectly like fish and bird population.
Presently, the study was carried out on a selected reach of river Narmada near water intake point. Aim of the
study was to assess the distribution of macrozoobenthos near water intake point on river Narmada. Loss in the
distribution of macrozoobenthos fauna was recorded in lower reaches and in front of water intake point which
indicates that ecological conditions are degrading and in near future situation can be alarming in the respect of ecology.
... The average abundance (1696-4760 ind.m − 2 ) was recorded by Matin et al., (2018) which was twofold higher than the present findings. Khan et al. (2007) recorded the lower macrobenthic abundance (630-1040 ind.m − 2 ). Kumar et al., (2013) found a higher finding (119-4053 ind.m − 2 ). ...
... Both areas showed higher percentages of Polychaeta abundance. Other studies also showed Polychaeta as the dominant group (Khan et al., 2007;Sivadas et al., 2010;MK et al., 2012;Hossain et al., 2013;Matin et al., 2018). Polychaetes exhibit both sexual and asexual reproduction, and lead to rapid population increases contributing to their dominance (Musale and Desai, 2011;Noman et al., 2019). ...
... Four Novaculina species are currently recognised and these are distributed allopatrically across several drainages in Asia (Win et al. 2021). Novaculina gangetica Benson, 1830 Liu & Zhang, 1979 occurs in China (Morlet 1889;Brandt 1974;Liu and Zhang 1979;Khan et al. 2007;Shu et al. 2013;Baki et al. 2016;Sayenko et al. 2017;Ngo et al. 2018;Bolotov et al. 2018b;Ng et al. 2020;Win et al. 2021). ...
... nov., three species remain within Novaculina s.s. These include N. gangetica, occurring from the Ganges Basin in India to Bangladesh and western Myanmar; N. myanmarensis, restricted to the Salween and Ayeyarwady river basins in Myanmar; and N. chinensis, occurring in Yangtze and Minjiang basins in China (Benson 1830;Liu and Zhang 1979;Khan et al. 2007;Shu et al. 2013;Baki et al. 2016;Bolotov et al. 2018b;Win et al. 2021 ...
The razor clam genus Novaculina is a secondary marine-derived freshwater taxa within the otherwise exclusively marine family Pharidae. Novaculina currently comprises four valid species that are distributed allopatrically across several drainages in Asia. We employed an integrated approach, combining morphology and molecular phylogenetic analyses to elucidate the taxonomic placement of members within this genus. The multi-locus phylogenetic trees based on cytochrome c oxidase subunit I (COI), 16S rRNA and 28S rRNA gene sequences demonstrate that Novaculina is polyphyletic. Specimens identified as N. siamensis form a distinct clade that is not sister group to other currently recognised congeners. Furthermore, morphological examination reveals distinct characteristics in ‘N. siamensis’, namely a fused, fringed siphon, in contrast to the separated, smooth siphons observed in other species. Based on these findings, we propose the establishment of a new genus, Cenonovaculina gen. nov., to accommodate ‘N. siamensis’. The new genus is distinguished from other genera in having a short shell, deep pallial sinus, elongate, oval to bean-shaped anterior adductor scar and long fused siphons surrounded by conical tentacles.
ZooBank: urn:lsid:zoobank.org:pub:6E16FC43-5BBA-4791-A805-1C84859877A3
... A total of 3652 individuals belonging to 22 species of macrobenthos from 14 families under three Phyla like Mollusca, Annelida and Arthropoda were identified. Khan et al. (2007) found 20 species belonging to 16 families in Mouri river, Khulna and Hossain et al. (2009) found 20 genera of macrobenthos in Meghna river. The results of the above authors are in close resemblance to our present findings. ...
... and Mysis sp. were common in all seasons but their density was highest during monsoon (Fig. 5). This type of dominance of the macro benthos was reported earlier by Nupur et al. (2013) and Khan et al. (2007). Some important photos of macrobenthos recorded during study are shown in Fig. 6. ...
The abundance of macro benthic organisms was observed from a migratory bird visiting lake in Jahangirnagar University, Savar for a period from July 2016 to June 2017. A total of 22 species belonging to three phyla (viz. Mollusca, Annelida and Arthropoda) and 14 families was recorded with maximum abundance in summer season and minimum in winter season. Molluscan population (37%) was dominant in benthos, followed by Annelida (31%) and Arthropoda (28%). Average values of water temperature, dissolved oxygen and water pH were within standard permissible ranges in the aquatic habitats of the country. Water and soil parameters were in suitable ranges for the growth and abundance of benthos. Correlation indicated that Mollusca and Annelida were closely dependent on water temperature, water pH, water depth, soil organic carbon and soil organic matters, whereas Arthropoda had less dependency on them. In the present study lower Shanon-Wiener diversity index (2.55-2.92) and low species richness (18-24) clearly demonstrated that the lake is moderately polluted. J. Biodivers. Conserv. Bioresour. Manag. 2018, 4(2): 99-106
... Similarly high abundance of pollution tolerant species particularly Chironomous species at Sangam, Asham, Baramulla and Srinagar sampling stations indicate the organically polluted conditions at the study sites, which may be attributed to input of domestic sewage , agricultural wastes into the water body from immediate catchment areas. Similar kind of findings were reported byTimm et al. 2001;Khan et al. 2007. And Gudooet al.2020 in their studies.Entomofaunal abundance was found minimum at Verinag (333 ind./m 2 ) and Kokernag (332 ind./m 2 ) sampling stations and maximum at Sangam (545 ind./m 2 ), Asham (505 ind./m 2 ), Barmulla (509 ind./m 2 ) and Srinagar (517 ind./m 2 ) sampling stations, but opposite was witnessed with respect to Shannon's diversity index,Margalef's diversity indices shows a declining trend from Verinag to Srinagar sampling stations, which indicate that entomofaunaldiversity decrease with increase in water pollution. ...
The current study was undertaken to investigate the Entomofaunal diversity and physico-chemical features of River Jhelum in Kashmir valley. Entomofauna was collected by using a handmade D-frame net, while as physico-chemical analysis of water was conducted according the standardmethods of the APHA (2004). A total of 17 insect taxa were recorded, whichbelong to 7 orders and 13 families. The average population density of entomofauna was estimated 457 ind./m2 with order Diptera as most dominant group. Physico-chemical analysis of River waters revealed alkaline, and had hard water nature of River waters. The upper courses of River Jhelum witnessed higher Entomofaunal diversity due to less anthropogenic stress as compared to middle courses, which face higher anthropogenic stress.
... The differences in the S -W diversity index values between these locations were statistically significant (p<0.05). Noman et al. (2018) reported that the S -W index ranged from 1.05 to 1.67, while Khan et al. (2007) reported that the diversity index varied from 1.20±0.23-1.49±0.753. In contrast to most of the research that found little variation in the S -W index value, we found notable variation in the S -W index within the study area The evenness index (E) serves as a measure of biodiversity equality within a community. ...
... About 21 genera of macro invertebrates belonging to Oligochaeta (13 genera), Ceratopogonidae (2 genera), Chironomidae (4 genera) and Mollusca (2 genera) were identified in the present study which is similar to Saha et al. 35 were dominant. Lower number of macro-benthic genera than the present study was also reported by Ahmed et al., 39 Khan et al., 40 Nupur et al., 41 In this study, the dominant groups of benthic fauna were Oligochaeta> Ceratopogonidae> Chironomidae> Mollusca. Oligochaeta was found as the most dominant group of benthic fauna while Ceratopogonidae was the second dominant group followed by Chironomidae and Mollusca which are similar to the findings of Das and Islam 43 who reported Oligochaeta, Chironomidae, and Mollusca as the dominant benthic fauna in tropical freshwater ponds. ...
Benthic macroinvertebrates are essential components of aquatic biotic communities, performing several ecological roles in aquatic ecosystem functioning including nutrient circulation and recirculation. The species diversity, abundance and seasonal dynamics of benthic macroinvertebrates in a fish pond and their relation with pond bottom soil and water quality parameters were examined for the duration of one year during January to December. A total of 21 genera under four (4) different major groups of benthic invertebrates were identified. The mean abundance and a number of genera of each benthic macroinvertebrate group during the study period were in the following order: Oligochaeta (13 genera) > Chironomidae (4 genera) > Ceratopogonidae (2 genera) > Mollusca (2 genera). Among the genera, Tubifex spp., Pentaneura spp. and Culicoides spp. were most abundant and frequently occurred in all months. The properties of water quality and pond bottom soil influenced the pattern of the benthic invertebrates. The interaction of the water quality parameters and soil properties play an important role in the structure of the benthic communities. The total nitrogen (%) content of the sediments was found to be positively correlated with the occurrence and abundance of Chironomidae (r = 0.764; p < 0.01). The relationship between environmental variables and assessed soil quality properties with the diversity indices showed significant variation over months, whereas the Simpson diversity index (Ds) was judged to be a lower level of contamination. The Shannon-Wiener index (H´) and Richness Index (R) and Pielou evenness (J) revealed that the benthic community distribution was uniform, and the water quality parameter and soil parameters revealed tolerable conditions for the productivity of the pond. Considering the presence of 21 genera of macroinvertebrates, diversity index and properties of soil and water, the fish pond can be considered as a moderately productive pond.
... The maximum value was recorded at Station P5 during winter 2021 and the minimum were observed at Station P4 during monsoon 2020. Similar results were recorded from the stream of national park in Turkey, value of Shannon diversity index was found between 1.48 and 3.21(Turkmen and Kazanci, 2010) which indicates diverse composition of organisms.Vyas et al. (2012) observed the value of Shannon diversity index was between 1.14 and 2.75 during their study of River Narmada and in Mouri river of Khulna, Bangladesh with the range of 1.20 to 1.49(Khan et al., 2007).The minimum value of Shannon-Wiener index was recorded at Station P3 and Station P4 which clearly reflected heavy pollution of river Parbati at these stations. Samweel and Nazir (2014) employed Shannon-Weiner diversity index (H') to study the diversity of aquatic insects in Song River of Rajaji National Park, India, and observed that Shannon index for aquatic insects remained above 3.0 throughout the study period indicating good quality of water. ...
The objectives of this study were to clarify and evaluate the water quality and macroinvertebrate density and diversity of Parbati river Sehore, M.P India.The present study successfully utilized the benthic macroinvertebrates diversity as well as physiochemical parameters of river water. Based on Average Score per Taxon (ASPT) and the (WQI) values, urban sites of the river Parbati were categorized as polluted with Chironomus sp., Limmodrilus hoffmeisteri, Tubifex tubifex and Tubifex albicola as codominant taxa and Rural sites of the River exhibited doubtful (ASPT) or good quality(WQI) containing Odonata and Ephemeroptera families as codominant taxa. Our results further demonstrated that the biotic indice (ASPT) were more sensitive towards organic pollution than the WQI. However, the sites p-1, p-2 and p-5 fall in good category as per WQI but biotic index confirm that these sites are fair instead of good due to limitation of Ephemeroptera only at the reference site and absence of Plecoptera and Trichoptera at all the sites. Macroinvertebrates such as Odonata, Diptera, Coleoptera, Hemiptera, and Planorbidae (Mollusca) decreased with relative nutrient load
... The abundance of pollution-tolerant species, mostly Limnodrilus hoffmeisteri, Tubifex tubifex, Chironomus sp., and Lymnaea sp. in Anchar Lake, especially at site A2, indicates organic pollution and eutrophication. The results are similar to findings in other studies (Oliver 1971;Brinkhurst, Cook 1974;Milbrink 1980;Timm et al. 2001;Khan et al. 2007. The occurrence of Limnodrilus hoffmeisteri and Erpobdella octoculata at high density was attributed to presence of organic-rich waters and sewage loading in Anchar Lake, which had positive effect on growth of these worms (Gojar, Abubakr 2017). ...
Limnological profile of a semi-urban lentic ecosystem of Kashmir with special reference to the macroinvertebrate community of Anchar Lake
... This is consistent with the statement 1 a that the genus Limnodrilus (L. hoffmeisteri) is found in locations rich in organic matter and is food for Limnodrilus (Khan et al., 2007). Based on Table 2, it is known that L. hoffmeisteri is most commonly found at station IV and the least at station V. ...
The canals in the center of Sanggau City, West Kalimantan serve as a medium for wastewater which enters the Kapuas River. The density of community activities in this city has caused indications of its canals being polluted by organic and inorganic materials. These contaminants enter the canal continuously, hence its accumulation can change the texture of the substrate/sediment which is the habitat for aquatic Oligochaete. The purpose of this study was to identify and describe the types of aquatic Oligochaete in the canals of Sanggau City. The research was conducted from August to September 2020 using the purposive sampling method at five stations, namely Tanjung Sekayam Village, Ilir Kota Village, Beringin Village, and Bunut Village, with three replications at each sampling station. The results showed that aquatic Oligochaete at the canals of Sanggau City consisted of 1 order, 1 family, 2 genera, and 3 species with a total of 1367 individuals. The identified species are Branchiura sowerbyi, Limnodrilus claparedeianus, and Limnodrilus hoffmeisteri.Keywords: Species Identification, Aquatic Oligochaeta, Sanggau City Canal
... Certain species, mostly Limnodrilus hoffmeisteri, Tubifex tubifex, Glossophonia sp., Chironomus genus, Psychoda sp., Chaborus sp., Anax junius., planorbis, and Lymnaea species, were found to increase their numerical strength in the habitat enriched with high organic nutrient loading. The abundance of these species indicates the organic pollution and eutrophication, as also reported by Timm et al. (2001), Khan et al. (2007), Yaqoob et al. (2008), and König et al. (2008 in their respective findings. Strixino and Trivinhostrixino (1980) reported that water bodies with average depth (approximately 3 m) retain high temperatures and favor the propagation of Chironomidae and Chaboridae. ...
... Macrobenthos are organisms that are living on or inside the bottom of a water body (Barnes and Hughes, 1999;Idowu and Ugwumba, 2005;Khan et al., 2007). Generally, macrobenthos link with the primary producers and play an important role in the circulation and recirculation of nutrients throughout the aquatic ecosystems (Ikomi et al., 2005). ...
This study was conducted to understand the macrobenthos distribution and abundance in Sangu River to monitor the aquatic pollution level. Both surface and sub-surface water and benthic sediments were collected from three stations of the Sangu River. A few indices viz. Shannon-wiener, Simpson, Margalef’s and Evenness were used to estimate the macrobenthic assemblages. In this study, a total of 11 major taxa comprising total 870 macobenthic species were identified. Shannon-wiener index was maximum (1.58) at lower part (LP) which indicated moderate to heavily pollute aquatic environment of the Sangu River. The average diversity values of Shannon, Evenness, Simpson and Margalef’s indices were 0.97, 0.43, 0.39 and 1.54 respectively. The concentration of dissolved oxygen was the lowest (4.90 mg/L) at LP and the highest (5.08 mg/L) at upper part (UP). This study showed that macrobenthos abundances was influenced by higher temperature, salinity, and pH. The percentage of organic carbon content was maximum (98.18%) at LP where the macrobenthic abundance was 330 individuals/m2, whereas it was minimum (80.77%) at UP where macrobenthic abundance was 248 individuals/m2 that indicated carbon content also influence the assemblages of the macrobenthos in the Sangu River. A clear gradient of physico-chemical and benthic soil parameters fluctuation was also found to be responsible for the variations of macrobenthos assemblage in the Sangu River. The Dhaka University Journal of Earth and Environmental Sciences, Vol. 9(2), 2020, P 27-33
... The genus Novaculina contains four species with strictly allopatric ranges (Bolotov et al. 2018a). Novaculina gangetica Benson, 1830 was known to occur in the Ganges Basin in India and Bangladesh (Benson 1830;Subba Rao 1989;Khan et al. 2007;Baki et al. 2016) but was recently discovered in coastal basins of western Myanmar (Bolotov et al. 2018b). The range of Novaculina siamensis Morlet, 1889 covers the Bang Pakong and Pa Sak River basins in Thailand, and the Mekong Delta in Vietnam (Morlet 1889;Brandt 1974;Sayenko et al. 2017;Bolotov et al. 2018a). ...
The razor clam genus Novaculina Benson, 1830 (Bivalvia: Pharidae: Pharellinae) is a group of secondary freshwater bivalves. Four allopatric species in this genus are distributed throughout Asian freshwater drainages from the Ganges River in India to the Yangtze River in China. Here, we present several new occurrences of Novaculina myanmarensis and N. gangetica from Myanmar that were confirmed by means of a molecular approach. These occurrences expand our knowledge on the ranges of both species. Furthermore, we compiled an updated distribution map for all the species in this genus. Our phylogeographic research suggests that Novaculina myanmarensis colonized the Ayeyarwady Basin from rivers of the Salween Estuary (Donthami and Ataran rivers) during the Late Pleistocene. Conversely, Novaculina gangetica populations from Myanmar does not demonstrate any clear phylogeographic structure. At first glance, this pattern can also be caused by a (sub)recent (Pleistocene) immigration into coastal rivers of western Myanmar from the Ganges Basin, although this preliminary hypothesis is yet to be confirmed using DNA sequences of samples from India and Bangladesh. Finally, the taxonomic status of two doubtful nominal taxa initially described as Novaculina members is discussed, i.e. N. gangetica theobaldi Hanley & Theobald, 1874 and N. andamanensis Preston, 1908. These taxa are considered junior subjective synonyms of the estuarine bivalve species Cultellus maximus (Gmelin, 1791) (Pharidae) and Azorinus coarctatus (Gmelin, 1791) (Solecurtidae), respectively.
... and Gastropoda, 0.08-4.25% and similar to the results of Asadujjaman [19,20,23,39]. Among the recorded 28 macrobenthic families from the study sites, the maximum number of families was found in S-1B and S-2B of the Bakkhali River Estuary where 21 families were common in both stations ( Table 3). ...
... Though rivers in Bangladesh have high faunal diversity, potential cage culture areas have been given least importance due to lack of sufficient research. A number of researches (Khan et al. 2007;Hossain et al. 2009;Asadujjaman et al. 2012Abu Hena et al. 2013Islam et al. 2013;Noman et al. 2019) have been conducted on macrobenthos of coastal and estuarine waters of Bangladesh. Information on cage culture impacts on macrobenthos community and its distribution in the Dakatia River is scant despite its importance in providing many ecological and economic services to the local people of Chandpur, Bangladesh. ...
Tania NJ, Hossain MB, Habib, A, Musa N. 2020. Effects of fish cage culture on macrobenthic communities in a subtropical river. Biodiversitas 21: 3583-3589. The present study described the impact of freshwater fish cage culture on macrobenthic faunal assemblages in the Dakatia River, Chandpur, Bangladesh. The experimental design involved the establishment of four stations in two study sites, two stations near the culture area, and two stations away from culture area. A total of 23 macrobenthic taxa belonging to annelids, molluscs, arthropods, and other minor phyla were recorded from study sites. Oligochaetes were found to be dominant at all four stations composing 42.34% of the total macrobenthos. Pollution indicator benthic organisms i.e., Naididae (30.32%), Tubificidae (20.16%), and Chironomidae (3.54%) were found most in the cage culture area. The density of benthic macrofauna was higher (28,134 inds./m²) in the cage culture site than the non-cage culture site (4,358 inds./m²) due to high abundance of certain pollution tolerant species. However, the values of diversity indices i.e., Species Richness (SR), Shannon-Wiener (S-W) diversity (H´), Pielou’s evenness (E), and Margalef (J) were consistently higher in non-cage culture area than the cage culture area. One-way ANOVA showed no significant variation (P > 0.05) in diversity values between the sites. The results of the present study revealed effects of cage culture on the abundance, diversity, and composition of benthic macrofauna.
... Other benthic animals like macro in fauna find food or protection within the bottom. As for example mollusks, polycheates crab etc. excavated burrows in the bottom material or constitute tube, variety of these benthic macro fauna obtain their feed from organic materials and other nutrients contained in the sediment (Khan et al., 2007;Yakub and Igbo, 2014). However, to conserve and develop the coastal zone in sustainable way, it is important to undertake research work of the canal on the environmental issues, because these canals carry a significant amount of effluent in the coastal environment. ...
Benthic communities are important to any aquatic ecosystem and form important food source for most organisms especially fish. The study about macro benthos was carried out in a canal of southeastern coast of Bangladesh with some physico-chemical parameters of water and soil during post and pre-monsoon seasons. The canal originates from hilly areas and opens into the Bay of Bengal. Polychaetes were the most abundant group followed by Oligocheates Bivalves crabs during post-monsoon. Oligocheates were the most abundant group followed by Polychaetes, Bivalves during pre-monsoon. Salinity showed positive significant relationship with the Polycheates and as well as Phosphate-Phosphorus. A negative significant relationship was found between Chemical Oxygen Demand (COD) and Oligocheates abundance in the investigated canal and a positive relationship was found between Total Suspended Solids and Oligocheates abundance. There was no relationship among the parameters of water as well as soil and crab abundance. The abundance of macro benthos is useful indicators of the condition of the canal and of the canal habitat as a whole. The effect of anthropogenic induced stressors had resulted in an unstable physically controlled environment characterized by a low density of macrobenthos.
... Lumbriculus In the present study, it is evident that Shannon-Weiner index value ranges from 1.2 to 2.9 in three ecosystems, this indicating that all the ecosystems show moderate pollution. Khan et al, (2007) showed the diversity index ranging from 1.20 to 1.49 in their study, Bijoy Nandan (2007) reported that the Shannon-Weiner index ranged from 1.39 to 2.06 from five different sampling sites. Anbalagan et al., (2004) observed values ranged 1.883 to 2.493 from 4 sampling station and Sharma et al., (2008) showed the diversity index was altered from 3.44 to 1.98 in their observation. ...
KEYWORDS A study was conducted to evaluate the potential of benthic macro-invertebrates community assemblages in predicting the water quality status. Three sampling stations with various environmental quality gradients were selected at the Wainganga, Gadhavi and Khobragadhi River in Gadchiroli district in order to determine differences or changes in the benthos community associated with variability in water quality. The diversity indices like Shannon-Wiener index, Evenness or Shannon equitability index and Margalef's index were calculated. According to Shannon-Wiener index of species diversity, all the selected sampling sites fall under moderate pollution. The Shannon equitability index values showed a greater equitability in the apportionment of individuals among the species in all the sites while Margalef's index of species richness reveals that the site-I had more healthy body and have higher species diversity among all sampling sites. The species diversity of site-II is greater than site-III. The site-III had poorer in species diversity and nutrient material.
... power plants) and commercial activities like intensive use of mechanised boats for tourism and aquaculture ponds etc. have been reported to be an important source of trace metals in the IS Chatterjee et al., 2007;Chatterjee et al., 2009;Banerjee et al., 2012). In BS, core B-3 exhibits maximum contamination due to its location (Khan et al., 2007;Ahmed et al., 2011). Khulna newsprint mill, Goalpara power plant, jute, hardboard and steel mills also discharge their untreated wastes into Bhairab river (Ahmed et al. 2003). ...
... While its interpretation remained controversial in term of scale of pollution, the Shannon-Wiener diversity index has been used as a suitable indicator for water quality [53] [54]. The Shannon-Wiener diversity index values measured in this study for both zooplankton (1.03 -2.09) and phytoplankton (1.40 -2.01) indicate that the Kulekhani Reservoir water as moderately polluted water body [55] [56]. The observed general pattern of low pollutants with decrease in values for the zooplankton and phytoplankton diversity as we move downstream form Site A to Site C is similar to previously reported trends [57]. ...
... Biodiversity is a function of species richness and evenness with which the individuals are distributed (Margalef, 1958). Benthos is organisms that inhabit in the bottom of lakes, ponds and river ( Khan et al., 2007) as well as other aquatic systems. They are subjected to tropical cycles and erosion (Hossain, 2011). ...
Present study was conducted in the lower Meghna River and its Estuary at Chandpur, Barisal, Bhola, Hatiya and Sandwip during monsoon and post-monsoon season. A total of 17 major taxa were identified of which 10 and 15 were recorded during monsoon and post-monsoon season respectively. Macrobenthos abundance was comparatively greater during post-monsoon than monsoon. The water at lower Meghna was slightly acidic in both seasons. Salinity, soil pH and water temperature were found to be responsible for the variations in benthos assemblage (p<0.05). Canonical Corresponding Analysis (CCA) also indicated that most of the macrobenthos had close dependency to salinity, water temperature, soil pH, organic carbon and organic matter both in monsoon and post-monsoon. Benthos diversity (H') did not show much temporal variation (0.92±0.52 and 0.85±0.40 for the monsoon and post-monsoon seasons respectively). The highest macrobenthos diversity (H') was 1.53 at Bhola and the lowest was 0.29 at Chandpur both during the monsoon season. The macrobenthos evenness (J') also showed less variation between seasons (0.64±0.32 and 0.51±0.26 during monsoon and post-monsoon respectively). The maximum evenness value was found at Sandwip (0.95) during the monsoon season whereas the minimum value was at Barisal (0.20) during the post-monsoon.
... Biodiversity is a function of species richness and evenness with which the individuals are distributed (Margalef, 1958). Benthos is organisms that inhabit in the bottom of lakes, ponds and river ( Khan et al., 2007) as well as other aquatic systems. They are subjected to tropical cycles and erosion (Hossain, 2011). ...
Present study was conducted in the lower Meghna River and its Estuary at Chandpur, Barisal, Bhola, Hatiya and Sandwip during monsoon and post-monsoon season. A total of 17 major taxa were identified of which 10 and 15 were recorded during monsoon and post-monsoon season respectively. Macrobenthos abundance was comparatively greater during post-monsoon than monsoon. The water at lower Meghna was slightly acidic in both seasons. Salinity, soil pH and water temperature were found to be responsible for the variations in benthos assemblage (p<0.05). Canonical Corresponding Analysis (CCA) also indicated that most of the macrobenthos had close dependency to salinity, water temperature, soil pH, organic carbon and organic matter both in monsoon and post-monsoon. Benthos diversity (H') did not show much temporal variation (0.92±0.52 and 0.85±0.40 for the monsoon and post-monsoon seasons respectively). The highest macrobenthos diversity (H') was 1.53 at Bhola and the lowest was 0.29 at Chandpur both during the monsoon season. The macrobenthos evenness (J') also showed less variation between seasons (0.64±0.32 and 0.51±0.26 during monsoon and post-monsoon respectively). The maximum evenness value was found at Sandwip (0.95) during the monsoon season whereas the minimum value was at Barisal (0.20) during the post-monsoon.
... In the present study, range of this index was recorded from 1.12 to 2.10 which indicate moderate pollution with altered habitat structure. Khan et al., (2007) showed the diversity index ranging from 1.20 to 1.49 in their study on Mouri River, Bangladesh and Anbalagan et al., (2004) observed values ranged 1.883 to 2.493 from 4 sampling stations of courtallam hills of Western Ghats. Wilhm and Dorris, (1966) proposed a relationship between species diversity and pollution status of sampling sites as; species diversity value greater than 3.0 is clean water, values in the range of 1.0-3.0 ...
... and Gastropoda, 0.08-4.25% and similar to the results of Asadujjaman [14,15,18,34]. ...
A research on the assemblages of benthic macro faunal community in the coastal areas of Bangladesh was
conducted during February-March, 2015 following the standard methods to assess the status of environmental pollution. The abundance (r=0.846) and species richness (r=0.864) of the macrobenthic communities were significantly influenced by the water salinity of the sampling sites (p ≤ 0.05). Both the study areas namely the Bakkhali River Estuary and the Meghna River Estuary showing the highest (3909 ± 540 ind./m2) and lowest (2236 ± 689 ind./m2) density of benthic macrofaunal abundance respectively might be considered as moderately polluted areas according to the results obtained from Shannon-Wiener index of species diversity (2.69 ± 0.13 and 2.00 ± 0.11 respectively) and Margalef’s species richness (2.21 ± 0.43 and 1.36 ± 0.11 respectively). Therefore, it is plausible that the macrobenthic community explained in the present study might be a key future outline to assess the status of coastal water pollution of those concerned areas of Bangladesh.
... The highest value of index was found at station 2 which shows diversified species composition of macrozoobenthos whereas, lowest value of index was observed at station 5 which shows minimum diversity of organisms rather than others. Observations revealed during the study of River Narmada the value of Shannon diversity index was between 1.14 and 2.75 [12] and in Mouri river of Khulna, Bangladesh with the range of 1.20 to 1.49 [19]. ...
The aim of present study was to assess the diversity of macrozoobenthos in Morand River which is the major tributary of Ganjal River and comes under Narmada basin. For the present investigation, eight sampling stations were selected at different locations and results revealed that 31 taxa of macrozoobenthos were recorded from these sampling stations. During the rapid study, it was observed that phylum arthropoda was in dominant position than phylum mollusca and annelida. Macrozoobenthos diversity was assessed by using Shannon diversity index and Margalef diversity index.
... C'est ainsi que les eaux surface de stations d'études sont classifiées entre modérées et fortement polluées. A cet effet trois stations (S1 st1, S1 st.2 et S2 st.1) ont enregistré un sévère stress avec un indice de Shannon-Weaver inférieur à l'unité(Khan et al., 2007). Ces stations situées dans le secteur 1 (Est) comprenant un complexe polyindustriel, le nouveau port, l'exutoire de l'oued Saf saf et son effluent Zeramna et la station S2 st.1 (la jetée du port mixte : le secteur 2) localisée près de l'ancien port et Oued Béni Malek. ...
RÉSUMÉ
Le littoral de Skikda dispose de structures importantes (la pêche, l’industrie pétrolière et le tourisme). Par ailleurs l’urbanisation
menace la biodiversité et conduit à la dégradation progressive de cet écosystème côtier. En outre, ce milieu n’a pas été étudié
auparavant pour évaluer les organismes marins, en particulier ceux des substrats rocheux intertidaux. Le laboratoire EMMAL
d’Annaba a structuré des travaux de recherche pour l’identification et l’évaluation de ce groupe. Nos objectifs ont été d’évaluer
la composition du peuplement du genre Patella et d’en étudier l’abondance et la distribution le long du linéaire côtier. Ces
patellogastéropodes sont d’excellents bioindicateurs de pollution marine employés dans plusieurs réseaux internationaux.
Les suivis ont été menés de Septembre 2008 à août 2009, à la même période pour toutes les stations. Les douze stations sont des
sites rocheux exposés aux vagues, et positionnés le long du golfe de Skikda de «la plage Saf Saf» a l’est (36°52´57´´N; 6°55´28´´E)
jusqu’à « la plage Ravin des Lions» vers l’ouest (36°54´84´´N; 6°53´13´´E). Certaines ont la particularité de cumuler plusieurs
sources de rejets (urbains et /ou industriels) alors que d’autres sont supposées éloignées de toute activité anthropique.
La méthode de quadrat a révélé un total de 865 individus de Patella Linné, 1758. Les espèces observées étaient: P. caerulea Linné,
1758; P. rustica Linné, 1758; P. ferruginea Gmelin 1791; P. aspera Roding 1798; P. safiana Lamarck, 1819; P. vulgata Linné,
1758. Les deux premiers taxons sont les plus abondants au niveau de chaque site d’échantillonnage. En outre P. rustica était le plus
abondant au secteur est tandis que P. cearulea s’est avéré être plus fréquent vers l’ouest.
Dans le but de rechercher une éventuelle corrélation entre la contamination des eaux littorales de la baie de Skikda et la diversité du
peuplement des patelles, l’analyse hiérarchique ascendante utilisée sur les variables indice de Shannon-Weaver sur la base de log2
et de la richesse spécifique (S) par la méthode de lien simple et carré de la distance euclidienne a classifié les douze stations entre
modérément et intensément polluées.
D’autre part, une quantification des teneurs des ETM effectuée dans les eaux de surface des mêmes stations a révélé des concentrations
métalliques en dessous des normes algériennes. Quatre métaux lourds (Zn, Fe, Cu et Ni) ont été majoritaires et le chrome n’a pas été
détecté. En revanche, selon les recommandations internationales, certaines concentrations métalliques sont toxiques.
Mots-clés: Bioindicateur - patelle- pollution- Indice de Shannon-Weaver- Skikda-Algérie.
Gastropods Patellidae and their use in assessment of the pollution on the coastline of
Skikda (North East Algeria)
ABSTRACT
The coastline of Skikda (North East of Algeria) is filled with important structures (fishing, tourism and oil industry) but urban
planning threatens the biodiversity and leads to the gradual fade of this coastal ecosystem. Furthermore this environment has not
been studied previously to evaluate the fauna, particularly the intertidal rocky shores. The Laboratory EMMAL (Annaba, Algeria)
sought a chore for identifying and evaluating this group. Our objectives were to assess the composition of the settlement of the genus
Patella in this area and to evaluate the abundance and dominance conditions of this species along the coast. These species are testers
already used in several international networks for monitoring the levels of marine pollution.
Follow-ups were conducted from September 2008 to August 2009, at the same period for all the stations. All twelve sites are waveexposed
rocky, and positioned along the gulf of Skikda from “Saf Saf” beach on the East (36º52´57´´N; 6º55´28´´E) to “Ravin des
Lions” beach to the West (36º54´84´´N; 6º53´13´´E). Certain stations have the peculiarity to cumulate several sources of discharges
(urban and / or industrial), while others are expected far from any human activity.
Quadrate methods were used to collect informations. The identification disclosed a total of 865 shell specimens of Patella Linnaeus,
1758. The observed species were: P. caerulea Linnaeus, 1758; P. rustica Linnaeus, 1758; P. ferruginea Gmelin 1791; P. aspera
Roding 1798; P. safiana Lamarck, 1819; P. vulgata Linnaeus, 1758. The first two species were the most abundant at each sampling
site. Moreover P. rustica was the most abundant at the eastern sector while P. cearulea turned out to be more frequent in the western.
Razika MAATALLAH* (1) , Mohamed CHEGGOUR (2) & Kamel LOUADI (3) Abdallah Borhane DJEBAR (1)
... C'est ainsi que les eaux surface de stations d'études sont classifiées entre modérées et fortement polluées. A cet effet trois stations (S1 st1, S1 st.2 et S2 st.1) ont enregistré un sévère stress avec un indice de Shannon-Weaver inférieur à l'unité(Khan et al., 2007). Ces stations situées dans le secteur 1 (Est) comprenant un complexe polyindustriel, le nouveau port, l'exutoire de l'oued Saf saf et son effluent Zeramna et la station S2 st.1 (la jetée du port mixte : le secteur 2) localisée près de l'ancien port et Oued Béni Malek. ...
The coastline of Skikda (North East of Algeria) is filled with important structures (fishing, tourism and oil industry) but urban
planning threatens the biodiversity and leads to the gradual fade of this coastal ecosystem. Furthermore this environment has not
been studied previously to evaluate the fauna, particularly the intertidal rocky shores. The Laboratory EMMAL (Annaba, Algeria)
sought a chore for identifying and evaluating this group. Our objectives were to assess the composition of the settlement of the genus
Patella in this area and to evaluate the abundance and dominance conditions of this species along the coast. These species are testers
already used in several international networks for monitoring the levels of marine pollution.
Follow-ups were conducted from September 2008 to August 2009, at the same period for all the stations. All twelve sites are waveexposed
rocky, and positioned along the gulf of Skikda from “Saf Saf” beach on the East (36º52´57´´N; 6º55´28´´E) to “Ravin des
Lions” beach to the West (36º54´84´´N; 6º53´13´´E). Certain stations have the peculiarity to cumulate several sources of discharges
(urban and / or industrial), while others are expected far from any human activity.
Quadrate methods were used to collect informations. The identification disclosed a total of 865 shell specimens of Patella Linnaeus,
1758. The observed species were: P. caerulea Linnaeus, 1758; P. rustica Linnaeus, 1758; P. ferruginea Gmelin 1791; P. aspera
Roding 1798; P. safiana Lamarck, 1819; P. vulgata Linnaeus, 1758. The first two species were the most abundant at each sampling
site. Moreover P. rustica was the most abundant at the eastern sector while P. cearulea turned out to be more frequent in the western.
Razika MAATALLAH* (1) , Mohamed CHEGGOUR (2) & Kamel LOUADI (3) Abdallah Borhane DJEBAR (1)
(1) Laboratoire d’Ecobiologie et des Milieux Marins et Littoraux
(EMMAL). Faculté des sciences de la Nature et de la vie. Département
des sciences marines. Université Badji Mokhtar. Annaba. 23000
Algérie. maatallah.kherif@yahoo.fr, djebarborhane2000@yahoo.fr
(2) Unité Ecologie. Département de Biologie. Ecole Normale
Supérieure. Université Cadi Ayyad.B.P2400-Marrakech. Maroc.
c-mcheggour@ens-marrakech.ac.ma
(3) Laboratoire de Biosystématique et Ecologie des Arthropodes.
Faculté des Sciences de la Nature et de la vie - Département de
Biologie Animale - Université Constantine. 25000. Algérie.
l_louadi@hotmail.com
REV. CAMES - VOL. 02.2014
16 Sciences de la vie, de la terre et agronomie
For the purpose of searching a possible correlation between the contamination of coastal waters of the Bay of Skikda, the diversity and
abundance of Patella settlement, the structure of this community at each station of gulf of Skikda was analyzed using a dendrogram
on the variables (Shannon-Weaver index (H’) on log2 basis and species richness (S)) by the method of simple link and squared
Euclidean distance has classified the twelve stations studied between moderately and heavily polluted. Parallel quantification of
levels of ETM in coastal surface waters was carried out during the month of July 2008 and then found below the Algerian Standards.
Four heavy metals (Zn, Fe, Mn and Cd) dominated over the twelve stations; furthermore chromium was not detected in the coastal
waters of Skikda bay during this survey. However, according to international recommendations, some metallic thresholds are toxic.
In the present study the water quality parameters of the Halda River were investigated from January to December 2019. Four sampling sites viz. Madarsha, Madarikhal, Katakhali and Khondokia khal of the river were selected. Twelve physico-chemical parameters viz. air and water temperature (°C), dissolved oxygen (DO), biochemical oxygen demand (BOD, B; BOD, N), chemical oxygen demand (COD), pH, alkalinity, hardness, and salinity were studied and the values of these parameters varied from 26.3-37.3 (°C), 22.3-30.0 (°C), 4.27-5.86 mg/L, 1.85-4.55 mg/L, 2.04-4.9 mg/L, 12.8-40.2 mg/L, 7.5-7.75, 51-76 mg/L, 51-489 mg/L, and 0-4.1 ppt, respectively in different seasons and locations. Cluster Analysis (CA) exhibited similarity between the different water quality parameters and individual impact on each other. The parameters belong to the same cluster with minimum cluster distance (for instance, DO, CO2 and pH belong to cluster 1; alkalinity and hardness belong to cluster 2; BOD-B and BOD-N belong to cluster 3 and conductivity, TDS and COD belong to cluster 4) represented a strong positive association and might be influenced by the same seasonal oscillation. The water quality index (WQI) was calculated and the highest value was found in post-monsoon (1.2) followed by pre-monsoon (1.1) and monsoon (0.9). Among the planktonic assemblage, Bacillariophyceae was the dominating group over phytoplankton and Rotifer was the dominating group over zooplankton. The results revealed that anthropogenic intrusions coming to the river Halda through different discharge routes might affect the water quality and ecology of the river. This study will help us to know the present ecological status of the river Halda and to formulate guidelines to combat the anthropogenic intrusions adding to the river from difference source.
In the present study the water quality parameters of the Halda River were investigated from January to December 2019. Four sampling sites viz. Madarsha, Madarikhal, Katakhali and Khondokia khal of the river were selected. Twelve physico-chemical parameters viz. air and water temperature (°C), dissolved oxygen (DO), biochemical oxygen demand (BOD, B; BOD, N), chemical oxygen demand (COD), pH, alkalinity, hardness, and salinity were studied and the values of these parameters varied from 26.3-37.3 (°C), 22.3-30.0 (°C), 4.27-5.86 mg/L, 1.85-4.55 mg/L, 2.04-4.9 mg/L, 12.8-40.2 mg/L, 7.5-7.75, 51-76 mg/L, 51-489 mg/L, and 0-4.1 ppt, respectively in different seasons and locations. Cluster Analysis (CA) exhibited similarity between the different water quality parameters and individual impact on each other. The parameters belong to the same cluster with minimum cluster distance (for instance, DO, CO2 and pH belong to cluster 1; alkalinity and hardness belong to cluster 2; BOD-B and BOD-N belong to cluster 3 and conductivity, TDS and COD belong to cluster 4) represented a strong positive association and might be influenced by the same seasonal oscillation. The water quality index (WQI) was calculated and the highest value was found in post-monsoon (1.2) followed by pre-monsoon (1.1) and monsoon (0.9). Among the planktonic assemblage, Bacillariophyceae was the dominating group over phytoplankton and Rotifer was the dominating group over zooplankton. The results revealed that anthropogenic intrusions coming to the river Halda through different discharge routes might affect the water quality and ecology of the river. This study will help us to know the present ecological status of the river Halda and to formulate guidelines to combat the anthropogenic intrusions adding to the river from difference source.
The aims of this study were determined of water quality and macrozoobenthos communities' production potential in the Aharchai Riverone year (from October 2012 to September 2013).
Samples were taken at 12 stations by sorber sampler (50×50cm) and in the library were separated, identified, counted and weighed. In the river identified 12 families of macrozoobenthos including: Planaridae, Lumbriculidae, Tubificidae, Culicidae, Glossiphoniidae, Gamaridae, Heptagenidae, Caenidae, Chironomidae, Simulidae, Limnaeidae, Sphaeridea. Average of annual number was 159.83 ind/m2 and biomass was 1.49g/m2.The highest number was in August and lowest number in December with temporal and spatial variations. There are significant difference (p<0.01)in number of ind/m2 between months and stations. Bauer method shown that st.1 was in class I with excellent quality and the other stations were in the class II with good quality. The average biological condition was Z=1.85 and production potential determined 170 kg/h. Helsenhoff index shown that (HFBI=4.98) water quality was very good. The results shown that Aharchai River is one of the natural habitats with well balance and it is relatively low pollution but macrozoobenthos communities were temporal and spatial variations.
This study is aimed to collect information about the macrofauna diversity of Tawa River. The Tawa River joins to Narmada at district Hoshangabad (Madhya Pradesh). During the study 8 sites were selected for the investigation . collections of samples were done from the eight sampling sites of the river. Collected samples were identified up to species level and their diversity and richness were analyzed. Shannon index for diversity and margalef index for richness were used for the study.Total 48 taxa of macrofauna have been recorded from the identified sampling stations. Benthic fauna of phylum Arthropoda was found in dominant position in the study and phylum Mollusca was found in second position.
Keywords: Teesta barrage Endangered fishes Phytoplankton Zooplankton This study was conducted to monitor the present condition of endangered fishes and productivity of Teesta river closest to Teesta barrage situated in the Lalmonirhat district of Bangladesh. Water and sediment samples were collected twice in a month during the study period from six different (3 upstream and 3 downstream) sites with three replications for each. Required information about threatened fishes was collected from the sampling region associated fishermen and fish markets. The study disclosed over 50 threatened fish species in Teesta river including several threatened fishes namely Bagarius bagarius, Sisor rabdophorus etc. The commonly available endangered fishes were Macrognathus aculiatus, Mastacembelus armatus, Barilius tileo, Raiamas bola, Botia dario, B. lohachata etc. which are rarely available in nationwide. Planktonic flora and fauna determination revealed that comparatively higher density of plankton (n >11500 per liter) as well as more number of planktonic flora (>21 nos.) and fauna (>9 nos.) were monitored in the early monsoon and monsoon season (April-September) and comparatively lower planktonic density (n<10000 per liter) and less number were found in pre-monsoon season (January-February). The investigation of benthic fauna showed that the riverine ecosystem near to barrage contained 16 species of macro-benthos from different groups. Lastly, it can be noticed that it is very essential to take all effective necessary actions to provide good productivity and conserve the ichthyodiversity of Teesta river that will help to conserve the commonly available endangered and critically endangered fishes of Teesta river. To cite this article: Amin A. K. M. R., M. R. Shah, M. M. Alam, I. Hoshan and M. A. Zafar, 2020. Study on the present status of endangered fishes and productivity of Teesta river closest to barrage region. Res. Agric. Livest. Fish., 7 (3): 577-589.
Macrobenthos play an important role in estuarine ecosystems by resuspending
the bottom layer of water bodies and elevating the nutrients,
dissolved gases, and other materials between sediments and overlying water.
The study aimed to measure the physicochemical parameter of the study area, to
show the intertidal variation of macrobenthos, and to assess the relationship
between environmental variables and benthic infauna of saltmarsh habitat along
the Noakhali coast. Sediment infauna of saltmarsh was collected by using a
hand-held mud corer having an area of 0.01 m2 covering three tidal levels i.e.,
high tide level (HTL), mid-tide level (MTL), and low tide level (LTL). A little
variation was observed among the environmental parameters across three tidal
levels. A total of 16 taxa of benthic infauna belonging to Nereidae (37.60%),
Nereidae-1 (12.60%), Chironomidae (24.56%), Cerambycidae (2.17%) were
found in the three tidal levels. The Evenness index indicated the highest number
of similar species were at the sub-stations of LTLs with a value of 1, and the
lowest number of similar species was at the sub-station HTL1 with a value of
0.5712. The maximum Shannon diversity (HꞋ) index was found at the substation
MTL2 with a value of 1.631 and the minimum was at the sub-station
LTL2, LTL3 with a value of 0. Margalef species richness ranged from 0 to
0.8808 and the Equabilitty index (J) value from 0 to 0.8808. The diversity
profile was high (α=14) at the mid-tide level. The Simpson (1-D) and DO,
Shannon ( HꞋ), Margalef, and temperature were significantly correlated
(p<0.05). Again, almost all diversity indices showed a strong correlation with
temperature (0.75 ≤ r <1). The information generated here can be used to
measure the impact of pollution, to conserve the biodiversity of the study area,
and can also be used for further studies.
The razor clam genus Novaculina represents an example of a marine-derived, secondary freshwater group. It was thought to comprise three species: N. gangetica (Ganges and smaller basins in Bangladesh and northwestern Myanmar), N. siamensis (Bang Pakong and Pasak rivers in Thailand and Mekong River in Vietnam), and N. chinensis (lower Yangtze River, China). Here we describe Novaculina myanmarensis sp. nov., an additional species from the Ayeyarwady and Salween basins representing a divergent lineage that appears to be sister to N. gangetica. This new record closes a Novaculina range disjunction between northwestern Myanmar and Thailand. The populations of this novel species share a shallow molecular divergence from each other indicating potential dispersal events between the two distant freshwater basins during the Late Pleistocene. Our ancestral area modeling suggests that the MRCA of Novaculina crown group was a salt-tolerant freshwater species. The recent Novaculina species most likely originated via allopatric speciation. Our findings highlight that generalist estuarine species could have played the role as a source for bivalve expansions into freshwater and that western Indochina is a separate biogeographic subregion, which is clearly distinct from India. A new synonymy is proposed as follows: Pharellinae Stoliczka, 1870 = Novaculininae Ghosh, 1920 syn. nov.
The Naf River estuary is one of the most productive ecological ecosystems in Bangladesh providing an important feeding area for fishes and other aquatic animals. However, detailed information on macrobenthic communities is rarely available in this area. Our study focused on the seasonal and spatial variability of macrobenthic community structure with their biomass and functional guilds. In total, fortyseven taxa were identified under nine major groups and seven functional feeding guilds. Among macrobenthic taxa, Polychaeta was dominant in both seasons and all over the estuary contributing 60% of total benthos. The mean abundance of macrobenthos was higher during the pre-monsoon (2 972±1 994 inds./m2) than the monsoon (1 572±361 inds./m2) being maximum at mid-estuary region and minimum at upper and lower estuary regions. Of the diversity indices, density (P=0.01, P=0.003), the number of taxa (P=0.000 3, P=0.000 9) and Margalef′s Index (P=0.000 4, P=0.001) of macrobenthos were signifi cantly diff erent among stations and seasons. Shannon-Weiner index (P=0.009, P=0.12) and Pielou’s evenness index (P=0.03, P=0.14) had significant differences among stations but not among seasons. Cluster analysis suggested that distribution of macrofauna is strongly influenced by seasonality. Among the feeding types, carnivorous were found to be dominant at the upper and mid-estuarine regions, and herbivorous were at lower estuarine regions. Carnivorous species were dominant in both seasons. Omnivores have shown to be the most abundant feeding type in terms of biomass though herbivores were highest during monsoon.
Soft bottom macrobenthos are important component of the marine and coastal trophic chain. There has been sparse information regarding the distribution of soft bottom macrobenthos form the coastal water of Bangladesh. Consequently, the present study was an effort to reveal the diversity and abundance of macrobenthos in the Feni Estuary in a seasonal pattern together with the hydrological factors. A total of 17 taxa families of soft-bottom invertebrates were found over the two sampling seasons. The current study yielded a total number of 34,726 ind./m 2 (mean 2480ind./m 2) including 18,909ind./m 2 in wet season (mean 2682ind./m 2) and 15,817 ind./m 2 in dry season (2259ind./m 2). The highest density of soft-bottom invertebrates was in the wet season while the lowest number in the dry season. A total of 5 groups of macrobenthos were found over the two sampling seasons. The dominant group was Polychaeta that contributed 43.60% of the total soft-bottom invertebrates. The values of biodiversity indices were higher in dry season compare to the wet season in most of the sampling station during the study period.
به منظور آگاهی از شرایط اکولوژیکی، کیفیت آب و تعیین توان تولید رودخانه اهرچای به مدت یک سال (از مهر ماه 1391 تا شهریور 1392) در 12 ایستگاه به طور ماهانه از جوامع کفزیان نمونه برداری انجام شد. نمونه برداری ها توسط سوربر انجام و نمونه ها در آزمایشگاه جداسازی، شناسایی، توزین و شمارش گردیدند. در این رودخانه 12 خانواده از کفزیان شامل Planaridae، Lumbriculidae، Tubificidae، Culicidae، Glossiphoniidae، Gamaridae، Heptagenidae، Caenidae، Chironomidae، Simulidae، Limnaeidae و Sphaerideaشناسایی شدند. متوسط تعداد سالانه 159/83 عدد و زی توده 1/49 گرم در مترمربع تعیین گردید. بیش ترین تعداد (277 عدد با زی توده 2/8 گرم در مترمربع)در شهریور ماه و کم ترین مقدار آن ها (66 عدد با زی توده 0/59 گرم در مترمربع) در آذر ماه تعیین گردید که نشان از تغییرات زمانی کفزیان در این رودخانه بوده است.هم چنین بین میانگین های تعداد در مترمربع در ماه ها و ایستگاه های مختلف، براساس آزمون (F (p≤0/01 تفاوت معنی دار دیده شده است. طبقات کیفی با روش های بوئر تعیین و نتایج نشان دادند که ایستگاه 1 در طبقه آبی I و دارای کیفیت خیلی خوب و سایر ایستگاه ها به طور متوسط درطبقه آبی II و در کیفیت خوب قرار داشته اند. متوسط سالیانه وضیعت زیستی 1/85=Z و توان تولید جوامع کفزیان نیز 170 کیلوگرم در هرهکتار از بستر تعیین شده است. هم چنین کیفیت آب این رودخانه باروش هیلسینوف HFBI)4/98 ) و با کیفیت خیلی خوب تعیین گردید. بنابر نتایج حاصله، اهرچای یکی از زیستگاه های طبیعی سالم و کم تر در معرض ورود آلاینده و با تغییرات زمانی و مکانی کفزیان و دارای تولید طبیعی نسبتاً پایین ارزیابی گردید.
Aim and Background: Given the importance of the intertidal benthic communities as well as increasing urban and industrial facilities on the coast, this study was carried out to obtain basic information required in the control of the coast, environmental.
Material and Methods: Sampling was conducted in Bandar e Abbas, Bandar e Jask and Bandar e Lengeh by a powerboat in 2011 seasonally.
Conclusion: In this study Polycheata, Oligocheata, Crastacea, Mollusca, Nematoda, Nemerteana, Foraminiferida, Ophiuroidea and others were carried out. Results showed that Crustacea had the maximum density with amount of 333950 indm-2.
Discussion: Any changes to coastal ecosystems and intertidal zone will result in a change in the factors that govern the benthic communities as indicators of environmental changes as well as the dynamics of the visible world, evaluating and calculating.
Results: Due to Macrobenthos density and biodiversity indicators, it seems that a significant change in the density and biodiversity after algal bloom did not exist therefore; it had been before on the coast of Hormozgan.
Monthly variations of the Shannon-Wiener species diversity index (H̄) for benthic macroinvertebrates were recorded at three stations on river Ganga at Patna from July 1985 to June 1986. The Shannon-Wiener index is found to vary from 0.346 to 1.238 at station III, and indicates severe environmental stress. The range at station II, 0.689 to 2.434, is indicative of an intermediate state of environmental pollution, and the range at station I, 0.798 to 2.608, reflects a comparatively low load of pollutants.
Three main macroinvertebrate associations were found in the Bay of Quinte, Prince Edward Bay, and the adjacent area of Lake Ontario: a chironomid association of the eutrophic inner and middle bays; an association of many species of sphaeriids, oligochaetes, chironomids, and crustaceans in the mesotrophic lower Bay of Quinte and Prince Edward Bay; and a cold-stenotherm association of the oligotrophic deep basin of Lake Ontario. An additional, but more confined (inner Prince Edward Bay), association consisted of a variety of taxa, whose distribution appeared to be related to the distribution of vascular vegetation. All of the main taxonomic groups contributed to each association and to differences among associations. The lakeward progression of associations in the study area was closely similar to the west to east shifts in Lake Erie reported earlier. Species diversity in Lake Ontario associations apparently was related to degree of eutrophy and to water temperature.
A study was made of physicochemical conditions and benthic macroinvertebrate community structure in a stream receiving domestic and oil refinery effluents. Measures derived from information theory, diversity per individual and redundancy, were found to be more precise measures of stream conditions as reflected by benthic macroinvertebrate populations than traditional methods.
Benthic macroinvertebrate and physicochemical collections were made monthly in four bays of Keystone Reservoir, Oklahoma, from early November 1965 through October 1966. Benthic community structures were subjected to species diversity analyses and the results were related to selected physicochemical estimates. A total of 25 benthic macroinvertebrate species were collected. There was a high, inverse correlation between diversity (d̄) and conductivity, and between d̄ and depth. There was a direct, high correlation between conductivity and depth. There were significant differences in annual diversity (d̄) between bays which differed in water quality. Diversity indices were an easy and reliable method of determining long-term effects of waters of different qualities on the benthic fauna within reservoirs. The method should be of equal value when used on an entire reservoir, or in making comparisons between reservoirs.
These experiments were designed to determine the degree and kind of variability in the structure of the community that one might expect under very similar ecological conditions. The results of these experiments show that 95.5% to 98.0% of the specimens composed the same species in the eight communities. About 5% of the specimens were in the remaining species in one series of experiments and 1% to 2% of the species in the second series. The Shannon-Weaver diversity indices and the structures of the truncated log-normal curves representing the communities in a given series were also very similar.
Loch Linnhe and Loch Eil form the inner part of an extensive sea-loch system on the west coast of Scotland. Brief descriptions of the topographical and hydrographical characteristics of the area are given together with information on the granulometry and total organic carbon content of the sediments. A detailed quantitative faunal list of the macrobenthic species is given and their distribution over twenty-four stations throughout the system is described. The fauna may be roughly sub-divided into four major groups: 1.1) the deep-mud fauna, approximating to the Amphiura chiajei sub-community of the boreal Amphiura communities,2.2) the sandy-mud fauna, approximating to the Amphiura filiformis sub-community of the boreal Amphiura communities,3.3) the sand fauna, a mixture of species from the boreal Syndosmya and Venus communities,4.4) the gravel and pebble fauna, approximating to the Modiolus epifauna communities.There is considerable intermingling of these groups at many stations and, in addition, a number of ubiquitous species are predominant over a wide range of stations. It is concluded that distinct faunal communities do not exist in the system. Important environmental factors affecting the distribution of species are thought to be sediment-type, bottom current speed and, to a lesser extent, total organic content of the sediment. Depth appears to have little effect on distribution. Possible reasons for the blurring of distinctions between communities in enclosed and inshore areas are discussed.
Benthic community respiration rates of profundal sediments of Fuschlsee (37.6 mg O2 m–2 h–1 — eutrophic), Mondsee (40.19 mg O2 m–2 h–1 — eutrophic) and Attersee (11.5 mg O2 m–2 h–1 — oligo-mesotrophic) were measured in situ, and in cores. By exposing the sediments to different oxygen levels in the laboratory it was found that benthic community metabolism reduced with decreasing oxygen concentrations. The slope of the regression lines, relating oxygen uptake rates to oxygen concentrations, differed significantly for the different sites investigated. These results were closely related to the trophic conditions of the lakes.
The assumption that water pollution causes a depression in the diversity of benthic macroinvertebrates as measured by the Shannon index and similar diversity indices is questioned. An interpretation of the community response of benthic macroinvertebrates to pollution in the Millers River, Massachusetts is developed from species presence-absence and abundance data in conjunction with published information on the species' environmental tolerances as compared to chemical water quality data. This interpretation is compared with one derived solely from diversity index values. The interpretations are quite different; the differences may be attributed to other environmental factors such as impoundments and flow reductions which influence the fauna and thus the diversity index value, but which are not related to pollution. In addition, several intrinsic features of the diversity indices increase their bias.
The summer macroinvertebrate fauna was studied in six central Florida monomictic lakes during July, 1973. No direct relationships were found between physiochemical conditions and species diversity. Of the 22 species of benthic organisms recorded, only four species were found in all the lakes. Mean species diversity (d) values for the lakes ranged from 0.735 to 1.731.
Howmiller & Scott (1977) presented an ‘Environmental Index’ based on thorough knowledge of the ecological demands of species of freshwater oligochaetes frequently found in North American waters. These authors emphasized the fact that common diversity measures do not utilize information about the ecological attributes of the constituent species but rather about community structure. A modification of the ‘Environmental Index’ is here presented with the aim of increasing its sensitivity in Europe and possibly also in North America. Four ecological groups are here preferred to the original three, and the ecological valence of the ‘key-species’ Tubifex tubifex is discussed at some length. Whereas most environmental and diversity indices remain little affected by changes in the total abundance of oligochaetes, the modified index is sensitive to such changes. Comparisons are made with two of the most popular diversity indices applied to specific situations, i.e. the Shannon-Weaver index and Simpson's index.
In spite of recommendation in pollution manuals, indices of diversity may be inadequate in correctly characterizing situations of nutrient enrichment of freshwater environments. In the present study it is stressed that low diversity is usually found at both ends of the trophic scale and high diversity, which is supposed to characterize a clean and unstressed environment, is generally obtained in zones of transit between oligotrophic and eutrophic conditions — a likely result of the ‘nonequilibrium state’ described by Connell (1978) from coral reefs and rain forests in the tropics.
Handbook of common method in limnology (2 Ed.). The C.V. Mosby Company
- O T Lind
Lind, O. T. 1979. Handbook of common method in limnology (2 Ed.). The C.V. Mosby Company, St. Louis. pp
136-145.
The Biological Assessment of Pollution in Stream, Association of The River Authorities. Year Book and Directory
- D W Mackey
- P G Sulsby
- T Poodie
Mackey, D. W., P. G. Sulsby and T. Poodie. 1973. The Biological Assessment of Pollution in Stream,
Association of The River Authorities. Year Book and Directory, London. pp 189-197.
Assessment of water pollution
- S R Mishra
Mishra, S. R. 1996. Assessment of water pollution. Alpha Publishing, New Delhi, India, 16: 279-289.