Meiobenthos composition and structure in highly mineralized tributaries of Lake El’ton

Гусаков, В. А.; Gagarin, V. G.

doi:10.1134/s2079096112030067

Cited by 11 publications

(6 citation statements)

References 10 publications

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“…It is known that salinity is one of the most impor tant abiotic factors that regulate the structure of bio cenosis. It is an established fact that taxonomic diver sity simplifies in response to increasing levels of water salinity (Mitrofanova, 2010;Gusakov and Gagarin, 2012;. However, it should be noted that this pattern, which is due to peculiarities of the outfalls of the studied watercourses, cannot be traced.…”

Section: Resultsmentioning

confidence: 97%

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Autotrophic microorganisms in river outfalls of Lake Elton

et al. 2015

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Section: Resultsmentioning

confidence: 97%

“…However, each of these segments of the small rivers of Prieltonye is characterized by a specific morpho metric and hydrochemical regime Gusakov and Gagarin, 2012;Nomokonova et al, 2013). The most specific in this regard are the outfall areas, where water masses of the rivers and the lake interact and mix with each other.…”

Section: Introductionmentioning

confidence: 99%

Autotrophic microorganisms in river outfalls of Lake Elton

et al. 2015

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“…This family has 17 valid genera, among which Monhystrella possesses 36 valid species, with the majority of representatives found in freshwater and 13 species occurring in marine environments (Fonseca & Decraemer, 2008). Most of the freshwater representatives are to be found in arid regions such as Ethiopia and southern Africa (Abebe & Coomans, 1996; Heyns, 2002) and the drier regions of Russia (Gusakov & Gagarin, 2012). The dominance of Monhystrella has previously been identified in other studies such as those by Gusakov and Gagarin (2012) in which one species represented 78% to 93% of the local fauna, and by Bongers and Van de Haar (1990) wherein the genus was extremely common in the different types of analysed sediments.…”

Section: Discussionmentioning

confidence: 99%

Occurrence of the genusMonhystrella (Nematoda: Monhysteridae) in continental aquatic reservoirs and first description of the male of Monhystrella hoogewijsi

et al. 2021

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The order Monhysterida is highly important to freshwater environments, containing a number of genera noted for their ability to endure extreme environmental conditions, such as those found in semi‐arid regions. The genus Monhystrella is often cited in references to these regions. The present study was performed in six reservoirs in a semi‐arid region of Brazil, employing collection and identification techniques commonly used for the phylum Nematoda. Sixteen genera pertaining to the phylum were detected, although only Monhystrella was found in all the reservoirs, with a monospecific population of Monhystrella hoogewijsi identified in Olivedos Reservoir. The present study contains the first record of this genus and species in Brazil, as well as the first‐ever description of the male of the species. The main morphometric variations were a longer tail and smaller amphidial fovea of females from the Brazilian semi‐arid region. The differences in morphometric measurements and the description of the male specimen expand current descriptions and levels of knowledge regarding this species.

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“…Species classified in the Paracyatholaimus genus were recorded in all oceans and latitudes and were found in all types of habitats. P. intermedius has a remarkable distribution: it is a mainly brackish species (e.g., de Man, 1880;Warwick, 1971a), however, it was also recorded from marine (e.g., Kreis, 1963;Gerlach, 1965), freshwater (e.g., Riemann, 1966;Gagarin and Nguyen Vu Thanh, 2012;Gusakov and Gagarin, 2012), and terrestrial environment (Loof, 1961;Nzeako et al, 2019). Three species were found exclusively in the Freshwater habitats: P. lewisi Coomans, Vincx and Decraemer, 1985, P. paramonovi, and P. truncatus.…”

Section: Remarksmentioning

confidence: 99%

Diversity and Distribution of Cyatholaimidae (Chromadorida: Nematoda): A Taxonomic and Systematic Review of the World Records

2022

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Nematoda is a very species-rich phylum that has successfully adapted to almost all types of ecosystems. Despite their abundance and ecological importance, the taxonomic knowledge of nematodes is still limited and the identification of species is not trivial. In Cyatholaimidae, a relatively common and abundant family of free-living nematodes, the identification of organisms is challenging due to the overlap of some generic diagnoses and the absence of updated systematic reviews. Here we systematically reviewed the knowledge about the family diversity, providing a list of valid species, the diagnostic characters to genus level, and the geographical and habitat distribution of species. The review systematized a total of 619 records. The occurrences were classified into biogeographic ecoregions and habitats. Cyatholaimidae includes 211 valid species, classified in 20 genera. The genera can be differentiated based on six diagnostics characters, namely: pattern of cuticle ornamentation; number of longitudinal rows of pore-complex in cuticle; structures of the buccal cavity; presence/absence of pharyngeal bulb; pre-cloacal supplements aspect; and the shape of gubernaculum. Cyatholaimidae includes mainly marine species, mostly occurring in the Coastal Zone. Four and three species were registered in freshwater and terrestrial habitats, respectively, all classified in the genus Paracyatholaimus. About 38% of the valid species occur in more than one type of habitat, under very different environmental conditions, suggesting a broad niche. The occurrence of congeneric species in different habitats types indicates that, throughout the evolutionary history of the family, multiple ecological shift events have occurred. The family occurs worldwide in 74 ecoregions, and the majority of the records and species are in the North Sea and Western Mediterranean. Most species are endemic to one ecoregion, and examples of broadly distributed ones may be a result of misidentifications or cases of long-distance dispersal, especially for those associated with biological substrates.

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Meiobenthos composition and structure in highly mineralized tributaries of Lake El’ton

Cited by 11 publications

References 10 publications

Autotrophic microorganisms in river outfalls of Lake Elton

Autotrophic microorganisms in river outfalls of Lake Elton

Occurrence of the genusMonhystrella (Nematoda: Monhysteridae) in continental aquatic reservoirs and first description of the male of Monhystrella hoogewijsi

Diversity and Distribution of Cyatholaimidae (Chromadorida: Nematoda): A Taxonomic and Systematic Review of the World Records

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