Zooplankton of the Argazi reservoir (Southern Urals, Russia) and its long-term changes
Tóm tắt
The Argazi reservoir on the Miass River, the oldest reservoir in the Southern Urals, has been investigated. In total 49 species and forms of zooplankton are identified, including new and rare species for the fauna of the Urals. Throughout the reservoir zooplankton has high species diversity and considerable biomass (up to 11 g/m3). Rotifers are the leading group in the plankton of the reservoir. Compared to the early 1960s, the abundance and biomass of zooplankton has increased by 5–10 times. The disappearance of some plankton forms and the emergence of new ones, as well as an increased number of rotifers and some crustaceans by 1–2 orders of magnitude, are noted. The influence of three main factors that could lead to long-term changes in zooplankton—eutrophication, heavy metals pollution, and global warming—are considered. The last factor seems to be the most important.
Tài liệu tham khảo
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