No full-text available
To read the full-text of this research,
you can request a copy directly from the authors.
A new species of Achnanthes (Bacillariophyceae) from a freshwater habitat in a karst landform from south-central China
... While working on the diatom biodiversity of a karst landform in Guizhou, we observed many interesting diatom species, resulting in the description of one new genus and eleven new taxa (Kociolek et al. 2016a(Kociolek et al. , b, 2019Lowe et al. 2017;You et al. 2016You et al. , 2017You et al. , 2019Yu et al. 2017b). The aim of this article is to describe three new Achnanthidium species, based on light microscopy (LM) and scanning electron microscopy (SEM) of cleaned materials from this same karst landform. ...
La Reserva Ecológica Buenaventura Jocotoco, se encuentra ubicada en la provincia de El Oro en el cantón de Piñas, tiene una extensión de 2900 hectáreas, con un rango altitudinal que va desde los 400 a 1450 msnm. También, posee rangos de temperatura que oscilan entre 14 y 26 °C. Con relación a la formación vegetal que se presenta en dicho lugar, se considera como: Bosque Deciduo de la Costa con un clima subtropical y altitud de 900 a 1000 msnm, y ecorregión bosque húmedo tropical con una altitud de 600 a 800 msnm que se caracteriza por presentar una alta diversidad vegetal y animal (Ministerio del Ambiente del Ecuador, 2013).
La Reserva Jorupe se encuentra ubicada en la provincia de Loja cantón Macará, limita la frontera sur de Ecuador, presenta clima tropical y su temperatura oscila entre 17 a 24ºC (Fundación Jocotoco, 2020). La reserva cubre el 50% de la Cuenca del Río Jorupe, razón por la cual recibe el nombre de Reserva Ecológica Jorupe de la Fundación Jocotoco (Córdova, 2017).
Este catálogo recoge el estudio de las microalgas y cianobacterias encontradas en estas reservas ecuatorianas.
A new freshwater benthic diatom Amphora baotuensis is described from a karst spring in China, based on morphological and molecular phylogenetic data. Based on SSU rRNA and rbcL sequences the molecular phylogeny indicates that this species is closely related to A. copulata (Kützing) Schoeman & Archibald within the Amphora sensu stricto clade. Amphora baotuensis differs from congeners by a combination of morphological features including smaller cell size, a wide, rectangular to fan-shaped dorsal fascia, a well-developed raphe ledge on the ventral side and uniseriate ventral striae.
Biodiversity "hotspot" areas have been shown to possess unique diatom floras. During our diatom studies of some of these types of areas in China, samples were collected from Hainan and Guangdong Provinces, and four species from 4 different genera are proposed as new to science based on LM and SEM observations. These new taxa are Eunotia dinghunsis Liu & Kociolek, sp. nov., Brachysira subirawanae Kociolek & Liu, sp. nov., Microcostatus muscus Liu & Kociolek, sp. nov. and Iconella sanyatangum Liu & Kociolek, sp. nov. In addition, a species known previously only from Java and Sumatra, Pinnularia rivularis Hustedt, was observed, and herein we provide LM and the first SEM observations of this species.
Four new monoraphid diatoms are examined and described from a high-altitude (> 3000 m) region of western Sichuan, China. The descriptions are based on light and scanning electron microscopy observations, and the four new species are compared with similar taxa worldwide. Achnanthidium sichuanense sp. nov. has small, lanceolate-elliptical valves, with rounded apices. The outline and central area differentiate it from similar species. The unique characteristic of Eucocconeis undulatum sp. nov. is that it has valves that are undulate along the apical axis, forming an "H"-shaped area on both raphe and rapheless valves as seen in light microscope (LM). Platessa mugecuonesis sp. nov. and Platessa lanceolata sp. nov. are two small species, whose valve outlines and central areas make them different from other species in this genus. A. sichuanense sp. nov. and E. undulatum sp. nov. are discussed in terms of the relationship between "Achnanthidium & Psammothidium" and "Eucocconeis & Psammothidium", as these genera are difficult to separate according to morphological characteristics.
In this paper we inventory the continental diatom taxa described from inland waters in China, from the first species descriptions dating back to 1848 through 2019. China's geography and hydrography are complex, including the world's highest mountains, many large rivers, salty lakes, and large karst regions. From this area, a total of 1128 taxa have been described from China over this time period. We examine the number of taxa described in ca. 20-year intervals and note the periods of time of no to few descriptions, versus time intervals with many taxon descriptions. Early on, taxon descriptions of freshwater diatoms from China were done by mostly by Europeans working alone, and the time frame of 1948 to 1967 had few descriptions, as a devasting famine and the cultural revolution impacted scientific work and productivity. B.V. Skvortzov produced a large number of taxon descriptions, during his time in residence in Harbin, later while in Sao Paulo, Brazil, and even posthumously. More recently, a wide range of labs and collaborations across China, and with a diverse array of international partners, is ushering in a new, robust era of research on the biodiversity of continental diatoms. A few areas of research and work for the future are discussed.
Nupela major sp. nov., a new species of the diatom genus Nupela, is described from Maolan Nature Reserve, Guizhou Province, China. Observations were made using light and scanning electron microscopy documenting the size, shape and ultrastructure of the new species. Valves of the monoraphid frustules are elliptical-lanceolate with more or less cuneate, subtlety protracted ends. The raphe valve has a linear-lanceolate axial area and an irregularly-shaped central area. Striae appear intermittent or disrupted. The rapheless valve has a linear-lanceolate axial area widening in the center to form an asymmetrical central area that can in some specimens reach to the valve margin. The rapheless valve has a contoured valve face, with deep indentations in the axial area. The species is assigned to Nupela by virtue of its external occlusions on the areolae, and compared with similar species in the genus. The new species is found on stones beneath a waterfall and associated with a moss community.
A new species, Simonsenia maolaniana sp. nov., is reported from a typical karst landform, Maolan Nature Reserve, Guizhou Province, China. The valves are lanceolate (larger frustules) to elliptical-lanceolate (smaller frustules), widest in the centre of the valve, and narrowly rostrate, not protracted at the ends. The more lanceolate valve outline, greater valve width and coarser structure distinguish S. maolaniana from other Simonsenia species. A direct comparison between the new species and the sympatric (though rare) S. delognei was possible because the two occurred together at Maolan. This is the first report of Simonsenia from continental China.
Hantzschia species are uncommon in Xinjiang Province, usually found in small populations and found only in a few samples. However, the diversity in the region is relatively high, with 13 species and 1 variety being identified. Except for the cosmopolitan species H. amphioxys, H. abundans, H. virgata and H. distinctepunctata, most of the taxa in Hantzschia observed in this region have limited distributions, including H. vivacior, H. nitzschioides, H. compacta, H. barckhausenii, H. longa and H. vivax, as well as the species described herein as new. Four new species of Hantzschia are described: H. pseudobardii, H. sinensis, H. yili and H. subrobusta, a further two interesting species, H. vivacior and H. nitzschioides are documented with light and scanning electron microscopy. All species described are compared with other similar Hantzschia taxa from other localities or compared to holotype specimens. These data show a higher diversity of diatoms in Xinjiang Province than previously understood and provide additional information for understanding their biogeography.
Four species of Achnanthes sensu stricto have been observed in several subaerial habitats/localities
in Macedonia. The morphological features of all recorded species have been described based on light and
scanning electron microscope observations. Two species posses similar morphological features as already
described species and were identified as A. coarctata (Brébisson ex W. Smith) Grunow and A. sinaensis
(Hustedt) stat. nov. Two species have unique set of characters that separate them from the known species and
are described in this study as A. pseudocoarctata Levkov et Tofilovska sp. nov. and A. prominula Levkov et
Tofilovska sp. nov. All recorded species were compared with the type populations including A. coarctata, A.
coarctata var. sinaensis Hustedt, and A. intermedia Kützing.
Observations of the syntype populations of A. coarctata give precise frame of the morphological
variability of the species. Achnanthes pseudocoarctata appears similar to A. coarctata, but can be easily
differentiated by the morphological and ultrastructural features of the rapheless valve. Achnanthes coarctata
var. sinaensis has distinct morphological characters that make clear separation from A. coarctata, and therefore
we propose a new status of this taxon with raising its rank to a species level. Achnanthes prominula appears
similar to A. intermedia, but from latter can be easily separated by the position of the rapheless sternum. From
other species with lanceolate or elliptic–lanceolate valves, A. prominula can be differentiated by the valve
shape, position of the rapheless sternum, central area, stria and areola density.
A study on the fine structure of the genus Achnanthes species (Bacillariophyceae) is carried out at 92 stations for taxonomic purposes from January 2009 to April 2013 in Korean marine water, freshwater and brackish water. Twelve Achnanthes species are identified based on a variety of taxonomic characters by means of light microscopy and scanning electron microscopy. Of these, seven species, Achnanthes cocconeioides, A. groenlandica, A. javanica, A. kuwaitensis, A. parvula, A. pseudolongipes, and A. yaquinensis, are newly recorded in Korean waters. All 12 species are documented concerning a taxonomic key, description, distribution, seasonality, remarks and photographs. Twenty three Achnanthes taxa are identified
in the survey.
A new monoraphid marine species, Achnanthes pseudolongipes, is described. The structure of its valves and girdle resemble those of A. Zongipes Agardh, as well as the shape of the plastid. However, A. longipes has biseriate striae on both valves, whereas A. pseudolongipes has uniseriate striae on the raphid valve and biseriate (or triseriate) on the araphid valve. In the genus Achnanthes sensu stricto, only A. pseudolongipes possesses both uniseriate and biseriate striae. The number of striae between costae is one of the most effective features of the valve for the identification of taxa in the genus Achnanthes sensu stricto.
Achnanthes was described by Bory to include three species, A. adnata, A. dubia and A. baccillarioides, formerly included under Echinella stipitata Lyngbye. Boyer typified the genus Achnanthes using A. adnata and this typification has been accepted by subsequent authors. However no extant material of A. adnata is known. Since this species was based on E. stipitata, Lyngbye material was sought and examined. This material contains specimens of Achnanthes sensu stricto and can be used as the generitype of that genus. Light and electron microscopical observations of this material are presented.C. A. Agardh created the name Achnanthes brevipes as an avowed substitution for A. adnata and this is the name that has generally been used. There is little doubt that E. stipitata, A. adnata and A. brevipes refer to the same species. Since A. brevipes has been used most extensively in the literature there is a case for conserving this name. Based on our observations we propose that Lyngbye's material be accepted as the type for Achnanthes but that the name A. brevipes be considered for conservation against E. stipitata and A. adnata.
The availability of extensive experimental data and remarkable intra- and interspecific variation in breeding behaviour make Achnanthes Bory sensu stricto an especially good model for studying the reproductive and population biology of pennate diatoms. In most Achnanthes species studied, auxospore formation is accompanied by biparental sexual reproduction, but we found uniparental auxosporulation in Achnanthes cf. subsessilis. Auxosporulation appears to be apomictic and follows contraction of the contents of unpaired cells and then a mitotic division, which is normally acytokinetic: one nucleus aborts before the cell develops into an auxospore. Rarely, both daughter nuclei survive and cytokinesis produces two auxospores (two auxospores per mother cell is highly unusual in pennate diatoms); one may abort. Expansion of auxospores is not accompanied by deposition of a transverse perizonium, but a longitudinal perizonium is produced and consists of a wide central strip (structurally similar to the araphid valve) and at least one narrow lateral strip. This newly discovered asexual lineage in Achnanthes is discussed in relation to other reproductive systems found in the genus, and also in relation to the ‘sex clock’ hypothesis concerning the adaptive significance of the diatom life cycle. Brief information on chloroplast division and nuclear dynamics over the cell cycle is also presented.
The girdle of Achnanthes longipes has been studied using scanning and transmission electron microscopy. An examination of 132 isolated bands showed that they can be classified into 3 main morphological types, all of which are usually open at one end, and bear poroids with occlusions recalling those of the valve poroids. The most advalvar band (band 1 or valvocopula) has a single row of elongated poroids on the pars exterior. The poroids have a groove-like appearance in internal views. The band interlocks with the valve following the complementary shape of its pars interior and the internal valve margin. Type 2 bands, which follow the valvocopula in the abvalvar direction, have a ligula or ligula-like expansion at the closed end, with no antiligula; their pars exterior usually bears 2 rows of circular poroids. A type 2 band seems to interlock with the valvocopula via its crenulate pars interior. The crenations may interact internally with the poroids of the valvocopula, or the cavities marking the limit between pars interior and pars exterior of the valvocopula. Presumably, type 2 bands also interlock with other type 2 bands. Type 3 bands follow type 2 bands in the abvalvar direction. They differ from type 2 bands especially in the smooth pars interior, which probably makes the interlock with type 2 bands looser than between type 2 and 1 bands, or between band 1 and the valve. Mature cingula have a total of 6 bands each. In addition to the single type 1 band, there are probably four type 2 bands and one type 3 band.
This study clarifies the fine structure of the vegetative and initial valves of Achnanthes yaquinensis and briefly compares them to other Achnanthes species. It also elucidates the structure of the perizonium, based on auxospore development in short-term cultures. The araphid valve has marginal ridges and terminal spines that allow connecting valves to form a chain. The terminal spines develop from the rapheless sternum. The complete cingulum consists of 3–5 split bands with two rows of areolae. These features can be used to discriminate species within the genus. Sexual reproduction is isogamous with two mother cells producing two auxospores, which are enclosed in mucilage. The perizonium develops on one side of an auxospore only, comprising one large central longitudinal band and four closed bands. There are no transverse perizonial bands. The raphid valve of the initial cell forms first, underneath the longitudinal perizonium, followed by the araphid valve, which is not covered by any perizonial bands. The araphid valve of the initial cells lacks a marginal spine, and the rapheless sternum lies more centrally than in the vegetative cell. The relationship of the genus Achnanthes to other monoraphid diatoms is discussed briefly.
Despite variation in their protoplast organization and wall structure, monoraphid diatoms have traditionally been grouped as a single family or order, intermediate between the araphid and biraphid diatoms. However, the predominantly marine or brackish species of Achnanthes sensu stricto share protoplast and frustule features with representatives of the Mastogloiales rather than with other monoraphid diatoms. Meanwhile, studies of morphogenesis in Achnanthes have revealed that cells become monoraphid by filling in one raphe system during valve formation, indicating that the monoraphid condition is derived rather than primitive. Evidence from light and electron microscopy is presented to support the transfer of Achnanthes to the Mastogloiales, and an emended description of the order is given. It is concluded that the Achnanthales sensu Round et al. is a paraphyletic group and that the closest relatives of the various monoraphid genera must be sought among other raphid diatoms.
Great Smoky Mountains National Park, which straddles the Tennessee–North Carolina state-line is a biologically diverse region which has recently become the site of an All Taxon Biodiversity Inventory, an effort to chronicle species diversity by documenting all species in all phyla present within park boundaries. As a result of studies within the last two years, we have added 415 new algal taxa records. With records reported in 2004, we now have documented a total of 1000 taxa in the park. This paper summarizes all algal species found to date.
The relationships between 49 naviculoid diatoms, currently arranged in 14 families and four orders were investigated using cladistic analysis in order to test the types of characters used in diatom systematics and to assess how well the current classification reflects possible phylogenetic relationships in this group. Some of the families and orders comprise taxa with different protoplast characters, or taxa with similar protoplast arrangements are placed in separate families or orders. Therefore as both cell wall and protoplast characters were used, three analyses were undertaken; total data, protoplast data and frustule data. The analyses support the recognition of the Mastogloiales (unequivocally) and the Cymbellales (largely) but indicate that some of the familial groupings are more ambiguous. The members of the Berkeleyaceae, Berkeleya, Parlibellus and Climaconeis, were never grouped together and Achnanthes
brevipes never grouped with the other monoraphid diatoms, but usually with members of the Mastogloiales (total and protoplast data). Similarly, Round et
al.'s familial groupings within the Cymbellales do not emerge from our analyses. Our results support the hypothesis that monoraphid genera have arisen independently from different naviculoid diatoms, and that Achnanthes
sensu
stricto should be transferred to the Mastogloiales. Some of the problems associated with incomplete information and inaccurate terminology are discussed briefly.
Molecular sequence analyses have yielded many important insights into diatom evolution, but there have been few attempts to relate these to the extensive fossil record of diatoms, probably because of unfamiliarity with the data available, which are scattered widely through the geological literature. We review the main features of molecular phylogenies and concentrate on the correspondence between these and the fossil record; we also review the evolution of major morphological, cytological and life cycle characteristics, and possible diatom origins. The first physical remains of diatoms are from the Jurassic, and well-preserved, diverse floras are available from the Lower Cretaceous. Though these are unequivocally identifiable as centric diatoms, none except a possible Stephanopyxis can be unequivocally linked to lineages of extant diatoms, although it is almost certain that members of the Coscinodiscophyceae (radial centrics) and Mediophyceae (polar centrics) were present; some display curious morphological features that hint at an unorthodox cell division mechanism and life cycle. It seems most likely that the earliest diatoms were marine, but recently discovered fossil deposits hint that episodes of terrestrial colonization may have occurred in the Mesozoic, though the main invasion of freshwaters appears to have been delayed until the Cenozoic. By the Upper Cretaceous, many lineages are present that can be convincingly related to extant diatom taxa. Permate diatoms appear in the late Cretaceous and raphid diatoms in the Palaeocene, though molecular phylogenies imply that raphid diatoms did in fact evolve considerably earlier. Recent evidence shows that diatoms are substantially underclassified at the species level, with many semicryptic or cryptic species to be recognized; however, there is little prospect of being able to discriminate between such taxa in fossil material.
A new diatom species, Sellaphora constrictum sp. nov., is reported from a karst landform in the Maolan Nature Reserve, Guizhou Province, China. Valves of the new species are broadly linear, slightly constricted in the middle part of the margins and have round apices, an undulate filiform to lateral raphe, a narrow axial area and a narrow conopeum bordering axial area on each side. This species also has undulate ridges along the margin and near the center of the valve, giving the impression of longitudinal ridges on either side of the axial area under light microscopy. Internally, a round opening is present in the apex of the valve, and thickened transverse bars are absent in this region. There are two types of areolae on the valve exterior. Together these features distinguish the new species from all others currently assigned to the genus. We discuss the growing number of new species and genera from freshwater environments in China, and interpretations about the delineation of the genus Sellaphora.
We describe a new genus and species of the diatom family Stephanodiscaceae with light and scanning electron microscopy from Libo Small Hole, Libo County, Guizhou Province, China. Theriotia guizhoiana gen. & sp. nov. has striae across the valve face of varying lengths, and are composed of fine striae towards the margin and onto the mantle. Many round to stellate siliceous nodules cover the exterior of the valve. External fultoportulae opening are short tubes; the opening of the rimportula lacks a tube. Internally a hyaline rim is positioned near the margin. Marginal fultoportulae possess two arcuate opercles. Areolae have domed cribra on the valve face. Those near the margin do not open to the interior. One to three sessile to slightly-raised rimportulae are placed on the valve face towards the margin; they do not terminate shortened striae towards the center of the valve. This suite of features distinguishes this group from other known genera in the Stephanodicaeae. Cyclotella shanxiensis is transferred to Theriotia, making the new combination T. shanxiensis (Xie & Qi) Kociolek et al. comb. nov. It differs from T. guizhoiana by the presence of open pores near the margin of the valve. Features of the new genus are compared and contrasted with others in the Family Stephanodiscaceae. The two species of the genus, unlike most in the family, are known only from rivers and ponds from China and Japan.
We describe a new diatom species of the genus Eunotia from a karst pond in Maolan Town, a karst area in Moalan Nature Reserve, Guizhou Province, China, using light and scanning electron microscopy. The species is similar to Eunotia sudetica, differing in size and shape of the valves. Externally, the new species has striae contained in shallow, irregularly-shaped channels and individual areolae have narrow openings due to the presence of rimmed occlusions. A large external opening of the rimportula occurs at one end of each valve. Internally, the new species has alveoli covering the areolae, the alveoli are partial in some specimens, present only in the middle of the valve while they extend from the dorsal margin to the ventral margin in other specimens. This species has a large rimportula and pseudosepta. In addition to the differences in extent of the alveoli, specimens differ in that some are proportionately wider than others, in the narrower valves small spines are consistently present as well as a few, shortened striae on the dorsal margin. We compare this new species with others in the genus based on its morphological features, and note similar internal alveoli in a species assigned to the genus Fragilariforma.
Summer and winter distributional patterns of attached diatoms were investigated in Yaquina Bay and estuary, Oregon. Differences in species composition and diversity of diatom assemblages at selected stations from fresh water just below Elk City, Oregon, to the marine waters of lower Yaquina Bay were released to environmental gradients. A total of 16,475 diatoms from 30 samples was separated into 256 species and varieties, of which 97 were found in only one sample, and 72 were represented by a single individual. The most abundant diatoms in the August samples were Fragilaria striatual var. californica, Melosira moniliformis, M. nummuloides, Navicula mutica, and Synedra fasciculata, while in the February samples Achnanthes no.2 and no.4, Navicula diserta, N. mutica, and Nitzschia frustulum var. perpusilla were dominant. Of the most abundant taxa, Navicula no. 2, N. diserta, N. gregaria, Nitzschia frustulum var. perpusilla, Synedra fasciculata and Thalassionema nitzschioides were the most evely distributed among the stations. The mean species diversity for diatom assemblages sampled in February was slightly higher than for assemblages collected in August. In February the mean specific diversity within a genus was higher and the mean generic diversity slightly lower than in August. In general, differences in assemblages were closely related horizontally to the salinity gradient and vertically to the desiccation and insolation gradients. However, biological factors were more important in accounting for differences among assemblages in the summer than in the winter and these factors were primarily species interactions between diatoms and macro-algae.
This study provides an introduction to a microwave digestion technique for the extraction of fossil diatoms from sediments. The microwave technique is compared with the standard diatom extraction technique of Battarbee (Diatom analysis. In: Berglund B.E. (ed.), Handbook of Holocene Palaeoecology and Palaeohydrology. John Wiley and Sons) that uses a combination of dilute hydrochloric acid and hydrogen peroxide and the advantages and disadvantages of their use are discussed. The results suggest that the microwave technique is fast, inexpensive and most importantly produces replicable fossil diatom assemblage data. Small samples sizes are used (0.3 g) for the microwave method thus lower quantities of chemicals are required (6 ml), which significantly decreases the cost of sample processing. Our results show that the microwave digestion technique is a viable alternative that will produce similar results within a shorter period of time.
Sediments from two tidal flats in Yaquina Estuary, Oregon, USA, containing epipelic and epipsammic diatom communities, were sampled monthly for a period of one year. Prepared slides of the diatoms were made and the taxa identified and photographed. Taxa from the Biraphidineae and Monoraphidineae were most prevalent but many Araphidineac were present as well. A total of 154 species and varieties representing 55 genera were found. The interstitial diatoms were found to comprise a unique habitat with a characteristic flora which differs considerably from the cpilithic diatom community. The Southbeach and Sally’s Bend tidal flats differed from each other in community structure, this in all likelihood being due to the differing physical, chemical, and biological parameters to which the diatoms are exposed. Allochthonous taxa from fresh-water, phytoplankton, and fossil forms were found on occasion. Ten new species were described and holotypes deposited in the diatom collection of the Academy of Natural Sciences of Philadelphia. This study extends the distribution of many diatoms previously unreported from the Pacific coast of North America and further supports the cosmopolitan nature of many of these organisms.
The morphology and fine structure of two marine mooraphid diatoms, Achnanthes javanica Grunow and A. subconstricta (Meister) comb. Nov. (= A javanica var. subconstricta Meister) have been investigated.Observations on the valves of type material (Grunow in Cleve & Möller 1878) of A. javanica show them to be lanceolate to linear in shape with a marginal ridge on the araphid valve but lacking terminal orbiculi. Conversely, A. subconsticta has a marginal ridge and special marginal spines as well as terminal orbiculi. From SEM observations in girdle view, A. subconstricta. These features support the view that A. subconstricta should be considered an independent species.
We surveyed subaerial habitats on the four main islands of Hawaii, USA for freshwater algae to examine patterns of distribution and to search for endemic species. Habitats sampled included cliff faces that ranged in moisture content from very dry to periodically moist from groundwater fog and rain. In this report we focus on the species richness, distribution and morphology of the diatom genus Achnanthes sensu stricto. We document the distribution and morphology of Achnanthes inflata and describe five new species in this genus.
An ecological study of freshwater waterbodies on Ile de la Possession (Crozet Archipelago, Antarctica) was undertaken during
the austral summer of 1997/1998. Both diatom and chemistry data were collected. A highly diverse diatom flora of 210 taxa,
belonging to 32 genera, was identified from 127 samples. The most abundant genera were Fragilaria, Achnanthes and Navicula. Principal Component Analysis was used to classify the samples on the basis of their chemical characteristics. The analysis
revealed that pH and chloride were the main factors dividing the samples into three categories: rivers, more acid lakes, and
lakes with higher chloride content. Species assemblages correspond well with this division. Forward selection with Monte Carlo
permutations selected pH, chloride, habitat and hardness. Based on the analysis, four groups of samples can be made: rivers,
acid lakes, circumneutral lakes with low chloride concentrations and coastal pools with relatively high chloride levels. The
results also indicate that a specific diatom flora exists on the island, which is comparable to that of other islands in the
same area (Kerguelen and Macquarie).
Notes on new species and new records of diatoms from the Jiulong River Estuary, Fujian. China
- Cheng Z.
Cheng, Z. and Du, Q. 1984. Notes on new species and new records of
diatoms from the Jiulong River Estuary, Fujian. China.
J. Oceanogr. Taiwan S. 3: 199-201.
Diatomeas de Montevideo. Ostenia (Festschrift fur Cornelius Osten), Montevideo
- Frenguelli J.
Frenguelli, J. 1933. Diatomeas de Montevideo. Ostenia (Festschrift
fur Cornelius Osten), Montevideo. Estud. Bot. Region Uruguaya
13: 122-30.
Non‐marine and littoral diatoms from Antarctic and Sub‐Antarctic regions. Distribution and up‐ dated taxonomy
- Kellogg T. B.
Kellogg, T. B. and Kellogg, D. E. 2002. Non-marine and littoral diatoms from Antarctic and Sub-Antarctic regions. Distribution and
up-dated taxonomy. Diatom Monogr. 1: 1-795.
Variations on some pennate diatoms from Antarctica, 2
- Kobayashi T.
Kobayashi, T. 1965. Variations on some pennate diatoms from Antarctica, 2. JARE Sci. Rep. Ser. E., Biol. 24: 1-28.
- J P Kociolek
- K Balasubramanian
- S Blanco
Kociolek, J. P., Balasubramanian, K., Blanco, S. et al. 2019.
DiatomBase [Cited on 12 March 2019]. Available from: http://
www.diatombase.org
Diversity of the diatom genus Humidophila in karst areas of
- R L Lowe
- J P Kociolek
- Q.-M You
- Q.-X Wang
- J Stepanek
Lowe, R. L., Kociolek, J. P., You, Q.-M., Wang, Q.-X. and Stepanek, J.
2017. Diversity of the diatom genus Humidophila in karst areas of
Guizhou, China. Phytotaxa 305: 269-84.
Distributional patterns in assemblages of attached diatoms from Yaquina estuary, Oregon
- C. D. Mclntire
- W. S. Overton
Mclntire, C. D. and Overton, W. S. 1971. Distributional patterns in
assemblages of attached diatoms from Yaquina estuary, Oregon.
Ecology 52: 758-77.
Uber Natur und Ursprung der Chromatophoren im Pflanzenreiche
- Mereschkowsky C.
Mereschkowsky, C. 1905. Uber Natur und Ursprung der
Chromatophoren im Pflanzenreiche. Biol. Centralbl. 25:
593-604.
The Great Smoky Mountains National Park All Tau Biodiversity Inventory: A Search For Species In Our Own Backyard. Southeast. Nat. Special Issue
- J. R. Johansen
- R. L. Lowe
- S. Carty
Diversity of the diatom genus Humidophila in karst areas of Guizhou, China
- Lowe R. L.
- Agardh C. A.