Динамика количественного развития весенне-летнего зоопланктона Краснодарского водохранилища
This paper presents information on the quantitative development and species composition of the spring and summer zooplankton of the Krasnodar Reservoir in 2019, as well as long-term changes in the abundance and biomass of zooplankton for two seasons (spring and summer). The data on the changes in species diversity and quantitative development of zooplankton during the reservoir filling period and 25 and 45 years onward are presented. The dominant groups of zooplankters and dominant species among them have been identified. A comparison of the dynamics of qualitative and quantitative development of zooplankton in the Krasnodar Reservoir has shown that for the past 25 and 45 years (from 1974 to 2019), changes in species composition were insignificant. The number of species of planktonic organisms in each period under review is almost the same: 42 species during the reservoir filling period and 45 species in 1999–2001 and 2019. In terms of their abundance, rotifers and copepods prevailed in the present plankton composition, accounting for 57.3 and 40.7 %, respectively. Copepods accounted for 80.1 % of the total biomass. The average abundance of zooplankton organisms in the spring and summer seasons of 2019 exceeded the count for the period after flooding by 1.4 times, and for 1999–2001 it was by 2 times. However, the biomass of zooplankton in previous years was, on average, 3.5 and 8 times higher, respectively, due to the development of larger forms of cladocerans and copepods. The biomass of spring and summer zooplankton in the Krasnodar Reservoir in 2019 was 0.21−0.34 g/m3, which is compliant with the values characteristic for mesotrophic reservoirs. It is concluded that the Krasnodar Reservoir is a water body that has preserved its fishery potential for growing fish on natural feed resources.
| Main Authors: | , |
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| Format: | Journal Contribution biblioteca |
| Language: | Russian |
| Published: |
2022
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| Subjects: | Species composition, Biomass, Abundance, Food resources, Dominant species, Polyarthra remata, Keratella cochlearis, Bosmina longirostris, Acanthocyclops vernalis vernalis, ASFA_2015::Y::Zooplankton, ASFA_2015::S::Seasonal variations, |
| Online Access: | http://hdl.handle.net/1834/42361 |
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