Impact of goose-like birds on phytoand zooplankton of lakes in the Taimyr Peninsula
A. V. Krylov1, A. N. Sharov1, T. N. Anufrieva2,3, R. Z. Sabitova1, I. V. Chalova1, M. I. Gladyshev2,3
1Papanin Institute for Biology of Inland Waters, Russian Academy of Sciences, Borok, Russia
2Krasnoyarsk Science Centre of the Siberian Branch of Russian Academy of Science, Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russia
3Siberian Federal University, Krasnoyarsk, Russia
Keywords: algae, cyanobacteria, rotifers, crustaceans, hydrophilic birds, guanotrophication
Abstract
The data obtained on the qualitative and quantitative composition of summer phyto- and zooplankton of two lakes of the Taimyr Peninsula indicate a higher trophic status of the water body, which is under pressure from hydrophilic birds. Compared to the background water body, statistically significantly higher phytoplankton abundance (134.6 ± 16.3 thousand cells/l vs. 60.4 ± 11.8 thousand cells/l), zooplankton biomass (134.6 ± 16.3 thousand cells/l vs. 60.4 ± 11.8 thousand cells/l), zooplankton biomass (349.0 ± 170.2 mg/l vs. 64.5 ± 19.5 mg/l), rotifer biomass (15.6 ± 3.5 mg/l vs. 1.6 ± 0.4 mg/l) and their dominance, as well as saprobic index (1.71 ± 0.09 vs. 1.48 ± 0.06). At the same time, specific features of community organization were revealed - higher species richness of phyto- and zooplankton; absence of Cyanobacteria in phytoplankton composition and statistically significantly higher abundance of Bacillariophyta (80.7 ± 11.8 thousand kl./l vs. 31.7 ± 6.5 thousand kl./l), number of species (4 vs. 2) and biomass (326.6 mg/l vs. 60.6 ± 18.8 mg/l) of paddle-bearing crustaceans, which may be determined by the peculiarities of hydrobionts reaction to the products of bird activity. This allows us to speak about the prospects of guanotrophication to improve the trophic status of water bodies without significant deterioration of environmental quality and biodiversity of hydrobiont communities.
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