Hydrobiological communities of Veselovskoye water reservoir (the Manych River) in October 2016: The results of studies
The Veselovskoe reservoir is among the most productive reservoirs of the Manych Cascade. Sharp changes in the hydrological and hydrochemical conditions of aquatic animals' habitat have been typical for the reservoir since its formation. During the intensive succession processes taking place in the reservoir, a restructuring of the plankton and benthos communities was observed accompanied by significant fluctuations in their quantitative indicators. In 2016, there were conducted complex hydrological and biological studies of the reservoir in order to assess the structure of phytoplankton, zooplankton and zoobenthos at the present stage. The western part of the reservoir as the most productive was studied in the autumn by applying standard techniques. According to the data obtained, the phytoplankton abundance averaged 198.1 mln cells/m3, and their biomass constituted 149.1 mg/m3 in the region under discussion, with diatoms and cryptophytes dominating in the phytoplankton community. The abundance of zooplankton averaged 15,298 ind./m3, and its biomass was 42.3 mg/m3. Rotifers dominated in the zooplankton by number, while cladocera and copepods played a key role in the biomass. The zoobenthos number and biomass amounted, respectively, to 3,141 ind./m2 and 7.4 g/m2, the basis of the benthic fauna of the reservoir was formed by oligochaetes and chironomids, whose abundance was predominant, as well as by mollusks that predominated in biomass. Studies of recent decades have revealed a decrease in the phytoplankton and zooplankton biomass in the Veselovsky reservoir. After the successful acclimatization of benthic invertebrates of the Caspian estuary complex and the penetration into the reservoir and development of invasive species, primarily the Dreissena, the abundance and biomass of the bottom community have stabilized and are maintained at a high level due to the malacofauna development.
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Format: | Journal Contribution biblioteca |
Language: | Russian |
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2019
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Subjects: | Phytoplankton, Zooplankton, Zoobenthos, Fish food base, Фитопланктон, Зоопланктон, Зообентос, Кормовая база рыб, Biomass, Dominant species, Биомасса, Доминантные виды, |
Online Access: | http://hdl.handle.net/1834/15615 |
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Phytoplankton Zooplankton Zoobenthos Fish food base Фитопланктон Зоопланктон Зообентос Кормовая база рыб Biomass Dominant species Биомасса Доминантные виды Phytoplankton Zooplankton Zoobenthos Fish food base Фитопланктон Зоопланктон Зообентос Кормовая база рыб Biomass Dominant species Биомасса Доминантные виды |
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Phytoplankton Zooplankton Zoobenthos Fish food base Фитопланктон Зоопланктон Зообентос Кормовая база рыб Biomass Dominant species Биомасса Доминантные виды Phytoplankton Zooplankton Zoobenthos Fish food base Фитопланктон Зоопланктон Зообентос Кормовая база рыб Biomass Dominant species Биомасса Доминантные виды Zhivoglyadova, L. A. Luzhnyak, O. L. Shlyakhova, N. A. Hydrobiological communities of Veselovskoye water reservoir (the Manych River) in October 2016: The results of studies |
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The Veselovskoe reservoir is among the most productive reservoirs of the Manych Cascade. Sharp changes in the hydrological and hydrochemical conditions of aquatic animals' habitat have been typical for the reservoir since its formation. During the intensive succession processes taking place in the reservoir, a restructuring of the plankton and benthos communities was observed accompanied by significant fluctuations in their quantitative indicators. In 2016, there were conducted complex hydrological and biological studies of the reservoir in order to assess the structure of phytoplankton, zooplankton and zoobenthos at the present stage. The western part of the reservoir as the most productive was studied in the autumn by applying standard techniques. According to the data obtained, the phytoplankton abundance averaged 198.1 mln cells/m3, and their biomass constituted 149.1 mg/m3 in the region under discussion, with diatoms and cryptophytes dominating in the phytoplankton community. The abundance of zooplankton averaged 15,298 ind./m3, and its biomass was 42.3 mg/m3. Rotifers dominated in the zooplankton by number, while cladocera and copepods played a key role in the biomass. The zoobenthos number and biomass amounted, respectively, to 3,141 ind./m2 and 7.4 g/m2, the basis of the benthic fauna of the reservoir was formed by oligochaetes and chironomids, whose abundance was predominant, as well as by mollusks that predominated in biomass. Studies of recent decades have revealed a decrease in the phytoplankton and zooplankton biomass in the Veselovsky reservoir. After the successful acclimatization of benthic invertebrates of the Caspian estuary complex and the penetration into the reservoir and development of invasive species, primarily the Dreissena, the abundance and biomass of the bottom community have stabilized and are maintained at a high level due to the malacofauna development. |
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Journal Contribution |
topic_facet |
Phytoplankton Zooplankton Zoobenthos Fish food base Фитопланктон Зоопланктон Зообентос Кормовая база рыб Biomass Dominant species Биомасса Доминантные виды |
author |
Zhivoglyadova, L. A. Luzhnyak, O. L. Shlyakhova, N. A. |
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Zhivoglyadova, L. A. Luzhnyak, O. L. Shlyakhova, N. A. |
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Zhivoglyadova, L. A. |
title |
Hydrobiological communities of Veselovskoye water reservoir (the Manych River) in October 2016: The results of studies |
title_short |
Hydrobiological communities of Veselovskoye water reservoir (the Manych River) in October 2016: The results of studies |
title_full |
Hydrobiological communities of Veselovskoye water reservoir (the Manych River) in October 2016: The results of studies |
title_fullStr |
Hydrobiological communities of Veselovskoye water reservoir (the Manych River) in October 2016: The results of studies |
title_full_unstemmed |
Hydrobiological communities of Veselovskoye water reservoir (the Manych River) in October 2016: The results of studies |
title_sort |
hydrobiological communities of veselovskoye water reservoir (the manych river) in october 2016: the results of studies |
publishDate |
2019 |
url |
http://hdl.handle.net/1834/15615 |
work_keys_str_mv |
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dig-aquadocs-1834-156152021-05-19T06:59:13Z Hydrobiological communities of Veselovskoye water reservoir (the Manych River) in October 2016: The results of studies Результаты исследований гидробиологических сообществ Веселовского водохранилища (р. Маныч) в октябре 2016 года Zhivoglyadova, L. A. Luzhnyak, O. L. Shlyakhova, N. A. Phytoplankton Zooplankton Zoobenthos Fish food base Фитопланктон Зоопланктон Зообентос Кормовая база рыб Biomass Dominant species Биомасса Доминантные виды The Veselovskoe reservoir is among the most productive reservoirs of the Manych Cascade. Sharp changes in the hydrological and hydrochemical conditions of aquatic animals' habitat have been typical for the reservoir since its formation. During the intensive succession processes taking place in the reservoir, a restructuring of the plankton and benthos communities was observed accompanied by significant fluctuations in their quantitative indicators. In 2016, there were conducted complex hydrological and biological studies of the reservoir in order to assess the structure of phytoplankton, zooplankton and zoobenthos at the present stage. The western part of the reservoir as the most productive was studied in the autumn by applying standard techniques. According to the data obtained, the phytoplankton abundance averaged 198.1 mln cells/m3, and their biomass constituted 149.1 mg/m3 in the region under discussion, with diatoms and cryptophytes dominating in the phytoplankton community. The abundance of zooplankton averaged 15,298 ind./m3, and its biomass was 42.3 mg/m3. Rotifers dominated in the zooplankton by number, while cladocera and copepods played a key role in the biomass. The zoobenthos number and biomass amounted, respectively, to 3,141 ind./m2 and 7.4 g/m2, the basis of the benthic fauna of the reservoir was formed by oligochaetes and chironomids, whose abundance was predominant, as well as by mollusks that predominated in biomass. Studies of recent decades have revealed a decrease in the phytoplankton and zooplankton biomass in the Veselovsky reservoir. After the successful acclimatization of benthic invertebrates of the Caspian estuary complex and the penetration into the reservoir and development of invasive species, primarily the Dreissena, the abundance and biomass of the bottom community have stabilized and are maintained at a high level due to the malacofauna development. Веселовское водохранилище – одно из наиболее продуктивных среди водохранилищ Манычского каскада. С момента образования водоем характеризовался резкой сменой гидрологических и гидрохимических условий обитания гидробионтов. В ходе интенсивно протекавших сукцессионных процессов перестройка структуры планктонных и бентосных сообществ водохранилища сопровождалась значительными флуктуациями их количественных показателей. В 2016 г. на водоеме проведены комплексные гидробиологические исследования с целью оценить структуру фитопланктона, зоопланктона и зообентоса на современном этапе. Работы на водном объекте проводились с использованием стандартных методик в осенний период в наиболее продуктивной – западной – части водохранилища. Согласно полученным данным в среднем по району работ численность фитопланктона составила 198,1 млн кл./м3, биомасса – 149,1 мг/м3, в роли доминантов сообщества фитопланктона отмечены диатомовые и криптофитовые водоросли. Численность зоопланктона достигала 15 298 экз./м3, биомасса – 42,3 мг/м3. В зоопланктоне по численности доминировали коловратки, по биомассе ключевую роль играли кладоцеры и копеподы. Показатели обилия зообентоса в среднем составили 3 141 экз./м2 и 7,4 г/м2, основу бентофауны водоема по численности формировали малощетинковые черви и хирономиды, по биомассе доминировали моллюски. Исследования последних десятилетий указывают на снижение биомассы фитопланктона и зоопланктона Веселовского водохранилища. В донных сообществах после роста количественных характеристик, связанного с акклиматизацией беспозвоночных каспийского лиманного комплекса, а также проникновением и развитием видов вселенцев, в первую очередь – дрейссены, численность и биомасса стабилизировались и сохраняются на высоком уровне за счет развития малакофауны. Published 2019-10-04T09:59:58Z 2019-10-04T09:59:58Z 2019 Journal Contribution Refereed 1560-9278 10.21443/1560-9278-2019-22-2-234-242 http://hdl.handle.net/1834/15615 ru http://vestnik.mstu.edu.ru/show.shtml?art=2011 pp.234-242 Cascade of Manych Reservoirs Каскад Манычских Водохранилищ Веселовское водохранилище Veselovsky Reservoir |