Assessment of Changes in the Structure of Zooplankton Communities to Infer Water Quality of the Caspian Sea

Krupa, Elena

doi:10.3390/d11080122

Cited by 4 publications

(21 citation statements)

References 41 publications

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“…The basis of zooplankton quantitative variables was formed rotifers Brachionus quadridentatus, cladocerans Evadne anonyx, Podonevadne angusta, Podo vadne camptonyx, Podonevadne trigona, and copepods Acartia tonsa and Calanipeda aqued cis. In terms of abundance, the Shannon diversity index varied from 0.44 to 1.95 bits/i and from 0.51 bits/mg to 2.35 bits/mg [5,6].…”

Section: Description Of Study Areamentioning

confidence: 99%

“…Sturgeons of the Caspian Sea are benthivorous [2], with about 90% of the world's sturgeon catch currently being carried out in the Caspian Sea [3]. Furthermore, the Caspian Sea is a hotspot of biological diversity [3][4][5][6]. Biodiversity conservation is an important direction of life science, and its significance has formed the basis of many international documents, including the Convention on Biological Diversity [7].…”

Section: Introductionmentioning

confidence: 99%

“…The last time scrutinizing zooplankton studies were carried out in the Caspian Sea was in 2008 and 2016. According to published data, 37 taxa were identified in the zooplankton of the Kazakhstan part of the Caspian Sea in that period [5]. The number of planktonic invertebrates varied from 3600 to 150,800 individual/m 3 , and the biomass from 488.68 to 1766.5 mg/m 3 .…”

Section: Introductionmentioning

confidence: 99%

“…In terms of abundance, the Shannon diversity index varied from 0.44 to 1.95 bits/ind. and from 0.51 bits/mg to 2.35 bits/mg [5,6].…”

Section: Introductionmentioning

confidence: 99%

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The Current State of Zooplankton Diversity in the Middle Caspian Sea during Spring

Aubakirova,

Mazhibayeva,

Assylbekova

et al. 2023

Diversity

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The study of planktonic animals of the Caspian Sea is topical and, during the last centuries, has brought and continues to bring new results. This is an inevitable process attributed to the introduction of non-indigenous predatory representatives of zooplankton by ballast water of ships. During the study period, the zooplankton of the Middle Caspian Sea was represented by 13 taxa and consisted mainly of non-indigenous species typical of the Palearctic region. Native fauna was represented by three species—cladoceran Evadne anonyx, Podonevadne camptonyx, and copepod Halicyclops sarsi during the study period. The quantitative variables of zooplankton did not reach a high level in May 2020 and 2021 compared to the data of previous years. Cladocerans Podonevadne camptonyx, copepods Acartia tonsa, and larvae of Cirripedia dominated in 2020. By 2021, the dominant species of last year had been replaced by the cladoceran Evadne nordmanni. One-way ANOVA analysis detected significant differences in the quantitative variables of cladocerans and copepods between different years of zooplankton study. The decreasing abundance, biomass, and alteration of the dominant zooplankton species in the Middle Caspian Sea during the study period may be associated with the feeding type of predator species and a slight elevation of water salinity.

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Section: Description Of Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…In terms of abundance, the Shannon diversity index varied from 0.44 to 1.95 bits/ind. and from 0.51 bits/mg to 2.35 bits/mg [5,6].…”

Section: Introductionmentioning

confidence: 99%

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The Current State of Zooplankton Diversity in the Middle Caspian Sea during Spring

Aubakirova,

Mazhibayeva,

Assylbekova

et al. 2023

Diversity

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“…The informativeness of biological assessment methods is because the structure of natural communities is formed under the influence of a complex of climatic and anthropogenic factors. In particular, an increase in nutrient load is accompanied by an increase in the abundance and a decrease in the average size of planktonic invertebrates [11][12][13], as well as a violation of the structure of the dominance of species in communities [14][15][16][17]. The effectiveness of the bioindication method based on aquatic invertebrates in environmental studies has been shown in several publications [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Zooplankton as Indicator of the Ecological State of Protected Aquatic Ecosystems (Lake Borovoe, Burabay National Nature Park, Northern Kazakhstan)

Krupa

Romanova

Berkinbaev

et al. 2020

Water

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The enrichment of the protected Borovoe Lake with nutrients has taken place within the last 100 years, from the moment the first resort was formed on its shores. The purpose of this study was to assess the current ecological state of Borovoe based on the structure of zooplankton. According to the chemical data, in the summer of 2019, the content of nutrients in the water was, relatively, not high; the content of heavy metals was very low. Twenty-seven species were found in zooplankton. The average abundance of zooplankton was 988.8 thousand ind./m3 with a biomass of 1.52 g/m3. Rotifera dominated. Cladocera sub-dominated. The Shannon index values were 2.31 bit/ind. and 2.57 bit/mg; the values of Clarke’s W-statistics and Δ-Shannon were negative. The abundance of zooplankton increased more than nine times, but the average individual mass of an organism decreased from 0.0112 to 0.0016 mg over the past decade. Despite the relatively low content of nutrients, the structure of zooplankton demonstrated that the nutritional load on Lake Borovoe is currently close to critical. Statistical mapping of the data and redundancy analysis (RDA) showed that the primary source of lake pollution is the village of Borovoe and sanatoriums located on the southeast and northwest coasts.

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The Role of External Factors in the Variability of the Structure of the Zooplankton Community of Small Lakes (South-East Kazakhstan)

Aubakirova

Krupa

Mazhibayeva³

et al. 2021

Water

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The variability of hydrochemical parameters, the heterogeneity of the habitat, and a low level of anthropogenic impact, create the premises for conserving the high biodiversity of aquatic communities of small water bodies. The study of small water bodies contributes to understanding aquatic organisms’ adaptation to sharp fluctuations in external factors. Studies of biological communities’ response to fluctuations in external factors can be used for bioindication of the ecological state of small water bodies. In this regard, the purpose of the research is to study the structure of zooplankton of small lakes in South-East Kazakhstan in connection with various physicochemical parameters to understand the role of biological variables in assessing the ecological state of aquatic ecosystems. According to hydrochemical data in summer 2019, the nutrient content was relatively high in all studied lakes. A total of 74 species were recorded in phytoplankton. The phytoplankton abundance varied significantly, from 8.5 × 107 to 2.71667 × 109cells/m3, with a biomass from 0.4 to 15.81 g/m3. Shannon diversity index of phytoplankton in the lakes at high altitude varied from 1.33 to 2.39 and from 0.46 to 3.65 in the lakes at lower altitudes. The average weight of the cells of algae species varied from 0.2079 to 1.5076 × 10−6 mg in the lakes at lower altitudes, the average weight of the cells of algae species changed from 0.6682 to 1.2963 × 10−6 mg in the lakes at higher altitudes. Zooplankton was represented by 58 taxa. The total abundance of zooplankton varied from 0.05 to 169.00 thousand ind./m3 with biomass of 0.51-349.01 mg/m3. Shannon diversity of zooplankton in the lakes at lower altitude fluctuated from 0.42 to 2.32 and it was 0.66–1.77 in the lakes at higher altitudes. The average individual mass of specimens in zooplankton in mountain lakes ranged from 0.021 to 0.037 mg and varied from 0.002 to 0.007 mg in other lakes. The main factors in the development of the structure of zooplankton communities in small lakes were temperature, TDS, the content of nitrates, phosphates, and the composition and biomass of planktonic algae. The hydrochemical and biological data of the investigated lakes indicated their organic pollution. Our results once again confirmed the applicability of structural variables of zooplankton in assessing water quality.

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Assessment of Changes in the Structure of Zooplankton Communities to Infer Water Quality of the Caspian Sea

Cited by 4 publications

References 41 publications

The Current State of Zooplankton Diversity in the Middle Caspian Sea during Spring

The Current State of Zooplankton Diversity in the Middle Caspian Sea during Spring

Zooplankton as Indicator of the Ecological State of Protected Aquatic Ecosystems (Lake Borovoe, Burabay National Nature Park, Northern Kazakhstan)

The Role of External Factors in the Variability of the Structure of the Zooplankton Community of Small Lakes (South-East Kazakhstan)

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