Open AccessSEASONAL BIODIVERSITY AND PRODUCTIVITY OF PLANCKTOFAUNA IN SMALL WATER BODIES OF NORTHERN KAZAKHSTAN
Author(s) -
Lyudmila Ivanovna Sharapova
Publication year - 2020
Publication title -
vestnik astrahanskogo gosudarstvennogo tehničeskogo universiteta. seriâ: rybnoe hozâjstvo
Language(s) - English
Resource type - Journals
eISSN - 2309-978X
pISSN - 2073-5529
DOI - 10.24143/2073-5529-2020-4-81-92
Subject(s) - zooplankton , daphnia pulex , biodiversity , biomass (ecology) , productivity , environmental science , plankton , ecology , eutrophication , cladocera , biology , nutrient , economics , macroeconomics
The article presents the study results of zooplankton in six water bodies in Northern Kazakhstan in 2019. Small reservoirs (up to 1 m in depth) were characterized by shallow water and strong overgrowing. With sufficient development of the plankton biological fund (15-41 taxa), only one reservoir, the α-oligotrophic type, had a very low mass of zooplankton. The biodiversity of the communities varied significantly in different seasons. Two lakes, of the β-eutrophic and
α-polytrophic types, had high values in spring and summer (13.3 and 17.2 g/m3). The biomass was presented by valuable feed hydrobionts Daphnia pulex, species of the genus Ceriodaphnia. The zooplankton of the river Kamysakty and two other reservoirs reached moderate or average biomass levels in different seasons. The type of these reservoirs changed from α-mesotrophy to oligotrophy during the vegetation season. It is recommended to use the highly productive lakes for commercial catching the biomass of zooplankton. Measures on reducing overgrowth in terms of the reclamation of reservoirs will contribute to growing the mass of valuable biological resources and effective involvement of the reservoir into the economic turnover.