Plankton and Bottom Communities in the Saline Rivers of Lake Elton Basin: Statistical Analysis of Dependences

Зинченко, Т. Д.; Шитиков, В. К.; Golovatyuk, L. V.; Гусаков, В. А.; Лазарева, В. И.

doi:10.1134/s2079096118030083

Cited by 10 publications

(5 citation statements)

References 9 publications

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“…Probably, the predominance of benthic and planktobenthic diatoms is determined by a shallow depth of the river. These observations are in good agreement with the similarity and close linkage of plankton and bottom communities of invertebrates described recently in the Elton saline rivers (Zinchenko et al, 2018).…”

Section: Resultssupporting

confidence: 92%

Diatom assemblages of the brackish Bolshaya Samoroda River (Russia) studied via light microscopy and DNA metabarcoding

Selivanova¹,

Ignatenko²,

Yatsenko-Stepanova³

et al. 2019

Protistology

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Diatoms are highly diverse and widely spread aquatic photosynthetic protists. Studies of regional patterns of diatom diversity are substantial for understanding taxonomy and biogeography of diatoms, as well as for ecological perspectives and applied purposes. DNA barcoding is a modern approach, which can resolve many problems of diatoms identification and can provide valuable information about their diversity in different ecosystems. However, only few studies focused on diatom assemblages of brackish rivers and none of them applied the genetic tools. Herein, we analyzed taxonomic composition and abundance of diatom assemblages in the brackish mixohaline Bolshaya Samoroda River flowing into the Elton Lake (Volgograd region, Russia) using light microscopy and high-throughput sequencing of the V4 region of the 18S rDNA gene amplicons. In total, light microscopy of the samples taken in 2011-2014 and 2018 allowed to distinguish 39 diatom genera, represented by 76 species and infraspecies taxa. Twenty three species of diatoms were recorded in the river for the first time. Next-generation sequencing revealed a larger number of diatom taxa (26 genera and 47 OTUs in two samples vs. 20 genera and 37 species estimated by light microscopy). As a result, sequences of Haslea, Fistulifera, Gedaniella were recorded in the river for the first time. Significant differences in the data obtained with molecular and light microscopy approaches are discussed. Some V4 18S rDNA sequences were characterized by a low similarity with homologues from the reference database. We revealed high spatial-temporal heterogeneity of the diatom assemblages, occurrence of freshwater species together with brackish and marine ones, and predominance of benthic and plankto-benthic species. Thus, investigations of diatoms in brackish rivers based on both morphological and molecular approaches provide a good chance of improving an understanding of diversity, ecology and biogeography of Bacillariophyta.

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Section: Resultssupporting

confidence: 92%

Diatom assemblages of the brackish Bolshaya Samoroda River (Russia) studied via light microscopy and DNA metabarcoding

Selivanova¹,

Ignatenko²,

Yatsenko-Stepanova³

et al. 2019

Protistology

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“…The chironomids of the bottom communities were represented by eurybiont halotolerant species. Among the benthic organisms of the highly mineralized rivers fl owing into hypersaline Elton Lake, chironomid larvae predominate in terms of both abundance and biomass [Zinchenko, Golovatyuk, 2010;Zinchenko et al, 2014Zinchenko et al, , 2017aZinchenko et al, , b, 2019.…”

Section: Ecological Studiesmentioning

confidence: 99%

“…Thus, the seasonal dynamics of the most abundant multivoltine populations of chironomids is mostly determined by changes in the environmental conditions of saline rivers and by the mineralization gradient. The timing of the emergence of adults during the growing season can be shifted, changed in the habitat of larvae with frequent changes in the level of mineralization under conditions of surge phenomena and the infl ux of salt water from the hyperhaline Elton Lake in the mouth sections of the rivers Khara, Lantsug and B. Samoroda [Zorina, Zinchenko, 2009;Zinchenko, Golovatyuk, 2010]. Microchironomus deribae populations of the river Bolshaya Samoroda are resident taxa, i.e., species that are permanently present in the region as self-sustaining populations.…”

Section: Charactersmentioning

confidence: 99%

“…These rivers have a permanent fl ow in the middle and lower reaches, whereas the fl ow is intermittent at the upper reaches, especially during dry years. The climate in the area is arid; air temperature in summer is up to 41.1C [Vodnobolotny.., 2005;Zinchenko, Golovatyuk, 2010]. During the sampling period, the water temperature ranged from 12.0 to 33.1 °C.…”

mentioning

confidence: 99%

“…Bottom sediments are black silt, silty sand and plant debris. Water fl ows of the rivers are regulated by both underground and rain water [Zinchenko, Golovatyuk, 2010]. The area is characterized by extreme living conditions, is a source of the formation of organic-mineral mud with high balneological value [Zinchenko et al, 2017a, b;2021].…”

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confidence: 99%

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Morphology and ecology of Microchironomus deribae (Freeman, 1957) (Diptera, Chironomidae) from the saline rivers of the Elton lake basin (Russia)

Orel,

Zinchenko

2023

euroasentj

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Morphology and ecology of Microchironomus deribae (Freeman, 1957) was examined by material collected in the saline rivers of the Elton Lake basin (Volgogradskaya Oblast, Russia). The species is redescribed and illustrated on the basis of three metamorphic stages (larva, pupa and adult male). Information on distribution and ecology of M. deribae from the saline rivers (total mineralization 4.0-41.4 g/l) of the Elton Lake basin is given too. Microchironomus deribae is a common inhabitant of mesohaline rivers, where larvae prefer silty-sand biotopes. The frequency of occurrence of M. deribae in the Khara, Lantsug, Bolshaya Samoroda Rivers is 25.8-40.4 %. On the basis of modern samplings M. deribae appears to be very abundant in saline eutrophic rivers. Microchironomus deribae accounted for 19-65 % of total abundance of chironomids in benthic communities of rivers with salinity up to 28.6 g/l.Резюме. Изучена морфология и экология Microchironomus deribae (Freeman, 1957) из солёных рек бассейна оз. Эльтон (Волгоградская область, Россия). Вид переописан и проиллюстрирован на основе трёх стадий метаморфоза (личинка, куколка, имаго самец). Приведены данные о распространении и экологии M. deribae из солёных рек (общая минерализация 4,0-41,4 г/л) бассейна оз. Эльтон. Microchironomus deribae -обычный обитатель мезогалинных рек, личинки которого предпочитают илисто-песчаные биотопы. Встречаемость M. deribae в реках Хара, Ланцуг, Большая Саморода составляет 25,8-40,4 %. Судя по современным сборам, M. deribae довольно многочислен в солёных эвтрофных реках. На него приходилось 19-65 % от общей численности хирономид в донных сообществах рек с солёностью до 28,6 г/л.

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Environmental threat and change detection in saline lakes from 1960 to 2021: background, present, and future

Saini

Pandey

2022

Environ Sci Pollut Res

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Plankton and Bottom Communities in the Saline Rivers of Lake Elton Basin: Statistical Analysis of Dependences

Cited by 10 publications

References 9 publications

Diatom assemblages of the brackish Bolshaya Samoroda River (Russia) studied via light microscopy and DNA metabarcoding

Diatom assemblages of the brackish Bolshaya Samoroda River (Russia) studied via light microscopy and DNA metabarcoding

Morphology and ecology of Microchironomus deribae (Freeman, 1957) (Diptera, Chironomidae) from the saline rivers of the Elton lake basin (Russia)

Environmental threat and change detection in saline lakes from 1960 to 2021: background, present, and future

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