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Eğirdir Gölü Hoyran Bölgesi Rotifer Faunasının (Rotifera) Sistematik ve Ekolojik Yönden İncelenmesi

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Hakan Didinen
Hakan Didinen
Hakan Didinen
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Yunus Ömer Boyacı at T.C. Isparta Uygulamalı Bilimler Üniversitesi
Yunus Ömer Boyacı
  • T.C. Isparta Uygulamalı Bilimler Üniversitesi
Anahtar Kelimeler
Anahtar Kelimeler
Anahtar Kelimeler
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Eğirdir Gölü
Eğirdir Gölü
Eğirdir Gölü
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Abstract

Eğirdir Gölü Hoyran Bölgesinde Nisan 2005- Mart 2006 dönemleri arasında farklı karakterlere sahip üç istasyon belirlenmiş ve aylık periyotlarla su ve plankton örnekleri alınmıştır. Bu bir yıllık çalışmada bu bölgede plankton örneklemelerinde Rotifera’ya ait 35 tür tespit edilmiştir. Bu türlerden Lepadella (Heterolepadella) ehrenbergi, Anuraeopsis fissa, Squatinella rostrum ve Lecane ludwigi Eğirdir Gölü Rotifera faunası için yeni kayıttır. Türlerin dağılımında ortam yapısının oldukça önemli olduğu tespit edilmiştir Görülme sıklığına göre türler, I. İstasyonda; Polyarthra vulgaris (12 ay), Keratella cochlearis (9 ay), Gastropus sp. (7 ay), II. İstasyonda; Polyarthra vulgaris (9 ay), Synchaeta sp. (8 ay), Lepadella ovalis (8 ay) ve III. İstasyonda ise; Polyarthra vulgaris (8 ay), Lepadella ovalis (8 ay), Synchaeta sp. (8 ay), Trichotria pocillum (8 ay) olmak üzere sıralanmaktadır. En yüksek yoğunluğa sahip türler sırasıyla, I. İstasyonda; Polyarthra vulgaris (631.066 org/m3), Asplanchna priodonta (61.211 org/m3), Synchaeta sp. ( 50.465 org/m3), II. İstasyonda; Polyarthra vulgaris (237.901 org/m3), Ascomorpha sp. (42.872 org/m3), Trichocerca similis (38.803 org/m3), III. İstasyonda ise; Anuraeopsis fissa (862.930 org/m3), Polyarthra vulgaris (270.008 org/m3), Lepadella ovalis (57.217 org/m3) olmaktadır. Bunların yanı sıra, sudaki fiziksel ve kimyasal değişimin rotiferler üzerine olan etkisi incelenmiş ve bu değişimlerden önem sırasına göre sıcaklık, klorofil-a ve organik madde en önemli parametreler olarak öne çıkmıştır
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Eğirdir Gölü Hoyran Bölgesi Rotifer Faunasının (Rotifera) Sistematik ve Ekolojik Yönden İncelenme
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... Bu bölge de su kuşları için önemli alanlar bulunur. Kıyı kesimlerinde elma bahçeleri ve tarım alanları bulunmakta, bataklık alanlar ise daha çok gölün kuzeybatısında yer almaktadır [6]. ...
Eğirdir Gölü (Hoyran Bölgesi) Fitoplanktonik Alg Florası Üzerine Bir Araştırma
Article
Full-text available
  • Apr 2016
Bu çalışmada Kasım 2012-Ekim 2013 tarihleri arasında Eğirdir Gölü (Hoyran Bölgesi) üzerinden seçilen 4 örnekyerinden aylık olarak alınan örneklerle gölün sıcaklık, pH, tuzluluk, elektriksel iletkenlik, seki görünürlüğü, klorofil-a değerleri incelenmiş, fitoplanktonun örnekyerlerine göre aylık dağılımları belirlenmeye çalışılmıştır. Çalışma alanında Bacillariophyta’dan 43, Chlorophyta’dan 20, Charophyta’dan 18, Cyanobacteria’dan 13, Dinophyta’dan 5, Euglenozoa’dan 3 ve Ochrophyta’dan 2 olmak üzere 104 takson belirlenmiştir. Fitoplankton florasının divizyolara göre dağılımı % 41 Bacillariophyta, % 19 Chlorophyta, % 17 Charophyta, % 13 Cyanobacteria, % 5 Dinophyta, % 3 Euglenozoa ve % 2 Ochrophyta olarak bulunmuştur. Bacillariophyta üyelerinin diğer bölümlere göre takson ve birey sayısı bakımından daha varsıl olduğu görülmüştür. Eğirdir Gölü, Hoyran Bölgesi’nin fitoplankton dağılımı, klorofil-a ve seki görünürlüğüne göre oligotrofik düzeyde olduğu sonucuna varılmıştır.
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... Erdoğan and Güher studied Gala Lake and they identified 71 species belonging to rotifer [6]. Yıldız et al. reported 29 rotifera species from an eutrophic lake Marmara [7] Didinen and Boyacı, reported 35 species from Hoyran Region in Egirdir lake [8]. Kaya and Altındağ, conducted a study from Gelingüllü Dam Lake and they report 54 Rotifera species [9]. ...
A Taxonomical Study on the Rotifer Fauna of Cappadocia region (Central Anatolia, Turkey)
Article
Full-text available
Many studies have been conducted on the rotifer species found in Turkey, but there are many regions that still remain to be investigated. Cappadocia (Nevsehir) is one such region that has not been studied in terms of diversity of the rotifer species. To our knowledge, the present study was the first to examine seasonal changes in rotifers in the Cappadocia region between February 2013 and April 2014. Seventy-two species of Rotifera belonging to 28 genera were recorded from 10 water bodies in the Nevsehir Province by repeatedly collecting samples in different seasons. Most species, (9, 13%) belonged to the genus Lecane followed by Trichocerca (7, 10%), Brachionus (7, 10%) and Cephalodella (5, 7%). From these results, we identified the richness of the Rotifera species in the Cappadocia region. All species that were found in this study were new records for each water source as well as for the Cappadocia (Nevsehir) region
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A Checklist of Turkish Rotifers
Article
Full-text available
  • Sep 2012
In a book chapter containing the first checklist and distribution of Turkish rotifers, published in 1999, were listed 167 taxa. Th e second checklist, published in 2004, reported 229 rotifer taxa in Turkey. During the 7 years since this checklist process, many studies have been carried out and we have prepared a new checklist of Turkish rotifers in the present study. In all, 341 rotifer taxa have been recorded to date.
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Distribution of rotifers in North Island, New Zealand, and their potential use as bioindicators of lake trophic state
Article
Full-text available
  • Jan 2001
The distribution and ecology of planktonic rotifers was investigated in 33 lakes in the North Island, New Zealand, between 1997 and 1999. A total of 79 species of monogonont rotifer were identified, with an average of 21 species per lake, a diversity which is high in comparison with many previous New Zealand studies. Most species recorded were cosmopolitan taxa, and were widespread in their distribution over the North Island. Multivariate analyses (Multi-Dimensional Scaling and Canonical Correspondence Analysis) did not distinguish distinct lake groupings based on rotifer communities, but rather gradients in assemblages, which were most highly associated with lake trophic state. Based on these responses, the development of potential rotifer bioindicator schemes for lake trophic state is described and discussed.
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Diurnal vertical distribution of rotifers (Rotifera) in the Chara zone of Budzyńskie Lake, Poland
Article
Full-text available
  • Mar 2001
Diurnal vertical distribution of rotifers was investigated in the Chara bed and the water immediately above it in the shallow region (ca. 1 m depth) of Budzyskie Lake (Wielkopolski National Park, Poland) in early September 1998. Eighty one rotifer species were identified – 71 among Chara and 59 in the open water. Significant differences in rotifer densities were observed in the Chara, with highest numbers during the day (2316 ind. l–1) and lowest numbers early morning (521 ind. l–1) and at dusk (610 ind. l–1). Above the Chara, the numbers of rotifers did not change significantly (615–956 ind. l–1). Littoral- or limnetic-forms differed in their diel vertical distribution between both zones. One group of littoral species was characterized by increased densities in the Chara in the daytime, while a second group increased in density during the night. The densities of limnetic species, which were much higher in open water, decreased in the morning or daytime in this zone. These differences in the diel behaviour of particular groups of rotifers may be dependent on microhabitat and may also be related to different kinds of predation, the exploitative competition for shared food resources between rotifers and crustaceans, as well as typical adaptation to littoral or limnetic life.
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Rotifer production in a shallow artificial lake (Lobo-Broa Reservoir, SP, Brazil)
Article
Full-text available
Rotifer production in a shallow artificial lake (Lobo-Broa Reservoir) was studied for twenty consecutive days between August 25, 1995 and September 13, 1995, during the dry season. Two species were dominant, during this period namely Filinia pejleri and Keratella americana, contributing, respectively, 36% and 28% to total rotifer numbers. Production estimates of these species were, respectively, 41.93 and 80.70 micrograms dry weight.m-3.d-1, corresponding to 18.45 and 35.51 micrograms Cm-3.d-1. The population of F. pejleri was numerically more abundant than that of K. americana, while the production of the former was less, as a result of lower egg to female ratios.
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A Checklist for Zooplanktonof Turkish Inland Waters
Article
A checklist is presented, based on compilation of previous zooplankton studies carried out at Turkish inland waters. As a result of studies conducted since 1940 to date, 229 rotiferans, 92 cladocerans and 106 copepods totalling 427 taxa is listed. Key Words:Rotifera, Cladocera, Copepoda, Zooplankton, Inland Waters, Turkey, Check-list
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Water quality monitoring and surveillance
Article
Essentially concerned with considerations in the design of sampling networks, in time and space, and the variables to measure Water quality monitoring is an important source of environmental information. -Jennifer Clayton
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Long‐term changes of planktonic rotifers in a subtropical Chinese lake dominated by filter‐feeding fishes
Article
1. The long-term changes (1956–1998) in density and species composition of planktonic rotifers were studied at two sampling stations (I, II) of Lake Donghu, a shallow eutrophic Chinese Lake densely stocked with filter-feeding fishes. Annual average densities of rotifers increased with an increase in fish yield and eutrophication, whilst species number decreased from 82 in 1962–1963 to 62 in 1994–1998. 2. During 1962–98, some species such as Anuraeopsis fissa, Polyarthra spp. (including P. dolichoptera & P. vulgaris), Trichocerca pusilla and Synchaeta oblonga increased their percentage in abundance remarkably, whilst the proportion of Keratella cochlearis decreased at two relatively eutrophic stations from 19 to 4.2% at Station I and from 30 to 3.2% at Station II. 3. The high rmax of A. fissa probably made it more successful than other rotifers under high predation pressure by planktivorous fish. The decrease in the K. cochlearis population might be attributed partly to predation by Cyclops vicinus. 4. Small rotifers were less vulnerable to fish predation than large-sized cladocerans. Decreases in cladocerans coincided with increases in rotifers, suggesting that the indirect effect of fish predation on cladocerans might have partly contributed to the population development of rotifers in Lake Donghu during recent decades. 5. We also conducted surveys (1994–1998) of seasonal dynamics of rotifers at four sampling stations (I–IV) which have varied in trophic status after fragmentation of the lake in the 1960s. A total of 75 species were identified at the four stations. Both densities and biomass of rotifers were considerably higher in the two more eutrophic stations than in the two less eutrophic stations. This indicates that the population increase of rotifers at Stations I and II during recent decades might be partly attributed to eutrophication of the lake water.
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Observations of insect predation on rotifers
Article
  • Jan 2001
Interactions between rotifers and their insect predators have not received adequate attention, possibly due to the assumption that rotifers are too small for insects to eat. In laboratory experiments, we offered the rotifers Hexarthra mira, Plationus patulus and small and large Synchaeta pectinata to four common insect predators: the notonectids Notonecta lunata and Buenoa macrotibialis, the smaller hemipteran Neoplea striola and small (1.5 mm) aeschnid dragonfly larvae. Excepting Plationus offered to dragonflies, all rotifer preys were consumed to some degree. No size selectivity was apparent for predators that ate few rotifers, but small instar Buenoa ate significantly more large (420 m) than small (300 m) Synchaeta. Predator size appeared to be less important than predatory style and prey morphology in determining ingestion rates. Neoplea and dragonflies ate more Hexarthra than Plationus, while the pattern was reversed for Buenoa, possibly because Buenoa is able to manipulate the hard lorica of Plationus better. Insect predators are capable of direct suppression of rotifer populations, an interaction which may be particularly important in littoral zones and fishless ponds where macroinvertebrates are numerous.
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Hydrobiological specificities of Eğirdir Lake
  • Jan 2002
  • M Y Aksoylar
  • Ö O Ertan
Aksoylar, M.Y., Ö.O. Ertan. 2002. Hydrobiological specificities of Eğirdir Lake, (in Turkish). DPT-97K122330 No.lu Proje, 179s., Eğirdir.