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ISSN: 2542-2006

Ecology and dynamics

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Ecology and dynamics
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Архив метки: Russia

CONDITION OF PLANKTON AND BOTTOM COMMUNITIES OF THE LOWLAND USA RIVER (BASIN OF THE MIDDLE VOLGA RIVER, KUYBYSHEV RESERVOIR) UNDER CLIMATE CHANGES

Ecology and dynamics Опубликовано 30 июня, 2023 автором admin16 октября, 2023

 Zinchenko T.D.,  Abrosimova E.V.,  Gorokhova O.G.,  Golovatyuk L.V.,  Kuznetsova R.S., Bolotov S.E. Condition of Plankton and Bottom Communities of the Lowland Usa River (Basin of the Middle Volga River, Kuybyshev Reservoir) under Climate Changes // Ecosystems: ecology and dynamics. No 2. 2023. P. 137-175. | Abstract | PDF | Reference

 

Scheme showing the location of sampling stations along the Usa River
Composition of plankton algoflora in the Usa River
Changes in the abundance (1) and biomass (2) of algae of different taxa at the sampling stations (ст) of the Usa River in 2017 and 2018

We studied the specific features of spatial and structural variability of plankton and bottom communities of the small lowland river Usa, a tributary of the Kuibyshev Reservoir, as part of comprehensive studies of the ecological condition and water quality of the river. Based on the results of 2017-2018 studies, we established the type of spatial distribution of phytoplankton, zooplankton and macrozoobenthos community species along the longitudinal profile of the river with regard to hydrochemical indicators.

A comparative analysis of changes in the species richness of plankton and bottom communities and assessments of the ecological state of river with regard to the spatial variability of species diversity and quantitative characteristics was carried out. Based on the results of changes in the number and biomass of the main taxonomic groups using different methodological approaches to study the dynamics of hydrobiological indicators, their non-stationarity and the existence of regular trends depending on hydrological and hydrochemical factors were established.

The biodiversity of summer plankton algocenoses of the Usa River depending on hydrological conditions, anthropogenic influence, and changes in the content of biogenic substances was assessed for the first time. 201 algoflora taxons ranked below genus from 7 algae divisions have been identified. The dominant ones are Bacillariophyta (56% of the composition) and Chlorophyta (28%). In the limnoplankton of the Usinsk Bay the species ratio in the composition of algae divisions changes in the direction of increasing share of green algae – Chlorophyta (45%). The proportion of Cyanoprokaryota varies from 4% in the Usa River to 12% in the Usinsk Bay.

 It was found that the spatial dynamics of algocenosis structure in the Usa River is characterized by an increase in species diversity, abundance, biomass, chlorophyll-«a» content from the source to the mouth. Correlation analysis revealed reliable relations (P ≤ 0.05) between flow velocity, chlorophyll-«a» concentration, abundance, specific number of species, biomass (r = -0.65, r = -0.69, r = -0.82,  r = -0.79, respectively). In terms of biomass and chlorophyll-«a» concentration, the trophic state of rivers in the upper and middle reaches is oligotrophic, in the estuaries – oligo-mesotrophic, in the Usinsk Bay water masses correspond to mesotrophic type. The main pollutant throughout the river is the concentration of total P (7-18 MAC), which is accompanied by an increase in the proportion of myxotrophic phytoflagellates – indicators of organic pollution. The increase in the number and biomass of phytoplankton in 2017 is due to the high content of biogenic elements (N, P).

Zooplankton of the Usa River water system includes 45 species, of which there are 28 Rotifera, 13 Copepoda and 4 Cladocera. Composition of zooplankton is typical for Volga basin water bodies and is represented by phytophilic and planktonic rotifers, planktobenthic crustaceans of Alona genus. For the first time in zooplankton of the mouth zone of the Usa River an invasive species, rotifer Kellicottia bostoniensis (Rousselet, 1908) – inhabitant of water bodies of northern latitudes was registered. The highest values of zooplankton abundance were recorded in the deep-water section of the “river – reservoir”, where the number and biomass of zooplankton reached 0.4 thousand ex/m3 and 5.4 g/m3 with predominance of holarctic Daphnia galeata (G.O. Sars, 1864). Dynamism of hydrophysical and hydrological parameters determines longitudinal distribution of quantitative and structural indicators of planktonic organisms communities by ecocline type in conditions of inhabiting meso-eutrophic water masses.

The spatial variability of plankton and bottom communities has been established, taking into account local biotopic variability determined by the landscape geomorphology features and the regular trend of quantitative indicators of biotic communities taxocenes.

Assessment of water quality and ecological state of the watercourse was performed using integral methods and metrics. The obtained results of the water quality assessment of the Usa River can be used as a reference for calculating the multi-metric indicators of the ecological state of typologically similar small plain rivers.

Keywords: Usa river, small rivers, plankton and bottom communities, taxonomic diversity, abiotic factors, spatial distribution, ecological state, water quality, the basin of the Kuibyshev reservoir (Middle Volga Basin, Russia).

Funding. This work was carried out for the state task No. АААА-А17-117112040040-3 “Assessment of Modern Biodiversity and Forecast of Its Change for the Ecosystems of the Volga Basin under the Conditions of their Natural and Anthropogenic Transformation”, №121051100109-1 “Systematics, diversity, biology and ecology of aquatic and semiaquatic invertebrates, structure of populations and communities in continental waters”, and supported financially by the Russian Foundation for Basic Research (17-04-00135; 17- 44-63019) “Ecosystem Diversity of Lowland Rivers in the Middle Volga Basin under Current Conditions of Climate Change and Anthropogenic Impact”.

DOI: 10.24412/2542-2006-2023-2-137-175

EDN: HGMMEE

Метки: abiotic factors, ecological state, plankton and bottom communities, Russia, small rivers, spatial distribution, taxonomic diversity, the basin of the Kuibyshev reservoir (Middle Volga Basin, Usa river, water quality

DYNAMICS OF ORNITHOCOMPLEXES OF THE FOREST AND FOREST-STEPPE ZONES OF THE IVANOVO AND TULA REGIONS WHEN CHANGING BACKGROUND CLIMATE AND WATER CONTENT OF RIVERS IN CONDITIONS OF ANTHROPOGENIC IMPACT

Ecology and dynamics Опубликовано 30 декабря, 2022 автором admin3 апреля, 2023

Shapovalova I.B. Dynamics Of Ornithocomplexes Of The Forest And Forest-Steppe Zones Of The Ivanovo And Tula Regions When Changing Background Climate And Water Content Of Rivers In Conditions Of Anthropogenic Impact // Ecosystems: Ecology and Dynamics. No. 4. 2022. P. 50-70. | Abstract | PDF | Reference |

 

Common lizard (Lacerta vivipara), June 2021 (Photo by I.B.Shapovalova)
Common viper (Vipera berus), July 2022 (Photo by I.B.Shapovalova)
Chick of the European nightjar (Caprimulgus europaeus), taken on 23/07/2022, in a pine forest with the lower layer formed by blueberries, near the margine, in the area of the Sakhtysh-Rubskoye peat mining (Photo by M.E.Koshelev)
Male wheatear (Oenanthe oenanthe), June 2019 (Photo by I.B.Shapovalova)

Common morel (Morchella esculenta) in the clearing near the Bogatyrevo Village (Photo by I.B.Shapovalova)
Yellowhammer (Emberiza citrinella), May 2022 (Photo by I.B.Shapovalova)
The nest of black-tailed godwits (Limosa limosa) in the fallow field near the Bogatyrevo Village, May 2022 (Photo by I.B.Shapovalova)
A pair of black-tailed godwits (Limosa limosa) in the fallow field near the Bogatyrevo Village, May 2022 (Photo by I.B.Shapovalova)

Globeflower (Trollius europaeus) on a mesophilic meadow near the Bogatyrevo Village, May 2022 (Photo by I.B.Shapovalova)
Green tiger beetle (Cicindela campestris) on a country road along the field, near the Bogatyrevo Village, in the area of the Sakhtysh-Rubskoye peat mining, May 2022 (Photo by I.B.Shapovalova)
Red-tailed bumblebee (Bombus lapidarius) on a mesophilic meadow near the Bogatyrevo Village, May 2022 (Photo by I.B.Shapovalova)
A young common moorhen (Gallinula chloropus) on the Ptan River in Kurkinsky District, Tula Region, July 2019 (Photo by I.B.Shapovalova)

In this article we present the results of monitoring of ornithocomplexes of floodplain ecosystems of the basins of small rivers of Tula and Ivanovo regions on the example of the rivers Ptan and Vyazma for the period 2019-2022. There is given a characteristic of the composition and structure of the floodplain ornithocomplexes of small rivers of the zone of mixed forests and forest-steppe zone. The analysis of seasonal and multi-annual dynamics of the floodplain ornithocomplex is according to the main transformation indicators (species diversity and abundance). The previously developed methodology for assessing the transformation of coastal ornithocomplexes of regulated sections of small rivers located in intrazonal conditions has been tested. The relationship between the species composition and abundance of coastal ornithocomplexes has been established.

Keywords: Russia, Ivanovo Region, Tula region, monitoring, dynamics, assessment, impact factor, zone of mixed and broad-leaved forests, forest-steppe zone, floodplain ecosystems, river floodplain, intrazonal landscape, aridization, hydrological regime, climate, precipitation, humidity, species composition, number, population density, abundance, ornithocomplexes, population, rare species, Red Book, swamp-near-water complex.

Acknowledgements. The author would like to thank the chief editor and reviewers of the “Ecosystems: Ecology and Dynamics” for their assistance with this publication. The author also expresses a special gratitude to Zh.V. Kuzmina and E.I. Tobolova.

Funding. The work was carried out for the Water Problems Institute of the Russian Academy of Sciences as part of the research work for 2022-2024 “Study of Geoecological Processes in Hydrological Systems of Land, Formation of the Quality of Surface and Ground Waters, Problems of Water Resources Management and Water Use under Conditions of Climate Change and Anthropogenic Impact”, No. FMWZ-2022-0002, State Registration No. AAAA-A18-118022090104-8.

DOI: 10.24412/2542-2006-2022-4-50–70

EDN: JWYDZG

 

Метки: abundance, aridization, assessment, climate, dynamics, floodplain ecosystems, forest-steppe zone, humidity, hydrological regime, impact factor, intrazonal landscape, Ivanovo Region, monitoring, number, ornithocomplexes, population, population density, precipitation, rare species, Red Book, river floodplain, Russia, species composition, swamp-near-water complex, Tula region, zone of mixed and broad-leaved forests

ORNITHOCOMPLEXES OF THE VYAZMA RIVER VALLEY AND THE NORTHERN PART OF THE SAKHTYSH-RUBSKOE PEAT FIELDS UNDER ANTHROPOGENIC IMPACT (SOUTHWEST OF IVANOVO REGION)

Ecology and dynamics Опубликовано 27 декабря, 2021 автором admin28 марта, 2022

Shapovalova I.B. Ornithocomplexes of the Vyazma River Valley and the Northern Part of the Sakhtysh-Rubskoe Peat Fields Under Anthropogenic Impact (Southwest of Ivanovo Region) // Ecosystems: ecology and dynamics. No 4. 2021. P. 103-125. | Abstract | PDF | Reference … Read next

Метки: abundance, aridization, assessment, bog-semi-aquatic complex, climate, floodplain ecosystems, hydrological regime, impact factor, intrazonal landscape, Ivanovo Region, ornithocomplexes, population, population density, population numbers, river floodplain, Russia, species composition, zone of mixed and deciduous forests

EXPERIENCE IN ASSESSMENT OF LAND DEGRADATION DYNAMICS OF THE SOUTH OF EUROPEAN PART OF RUSSIA USING THE METHODOLOGY OF LAND DEGRADATION NEUTRALITY

Ecology and dynamics Опубликовано 5 октября, 2020 автором admin30 декабря, 2020

Belyaeva M.V., Andreeva O.V., Kust G.S.,  Lobkovskiy V.A. Experience in Assessment of Land Degradation Dynamics of the South of European Part of Russia Using the Methodology of Land Degradation Neutrality // Ecosystems: ecology and dynamics. 2020. Vol. 4. No 3. … Read next

Метки: Land Degradation Neutrality, Land Degradation Neutrality Indicators, Russia, Trends.Earth

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