Open AccessQuantitative characteristics of zooplankton in the rivers of the Upper Amur Basin, exposed to the effects of placer gold mining
Author(s) -
E.H. Zykova
Publication year - 2022
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/962/1/012045
Subject(s) - placer mining , zooplankton , environmental science , productivity , crustacean , structural basin , tributary , hydrology (agriculture) , geology , drainage basin , oceanography , ecology , geography , geochemistry , biology , geomorphology , cartography , geotechnical engineering , economics , macroeconomics
Research conducted in June and September 2020 showed that the species composition of rotifers and lower crustaceans in 17 water courses of the Upper Amur Basin, exposed to the effects of placer gold mining, included 43 species. Most of the water courses were researched for the first time. Based on the environmental and geographic assessment, the prevalent species were widespread and eurytopic. Most parts of the rivers were characterised by low quantitative characteristics (0.01–3.77 × 10 3 ind. m -3 and 0.06–54.64 mg m -3 ), which was explained by the hygrological conditions and long-term effects of mining in the river beds. A better productivity (up to 39 × 10 3 ind. m -3 and 228 mg m -3 ) was registered in the areas of former excavations in the river beds, with slower water exchange and better conditions for the development of zooplankton.