The dynamics of biogenic elements in the ecosystem of Lake Arakhley (Eastern Transbaikal Region)

4th School-Seminar of Young Russian Scientists "Problems of Sustainable Regional Development", dedicated to the 70th anniversary of Academician of the Russian Academy of Sciences Arnold Kirillovich Tulokhonov

自然科学（总论）

Matveeva, M.O.^1 ; Ts Tsybekmitova, G.^1

Institute of Natural Resources Ecology and Cryology SB RAS, Chita

672014, Russia^1

关键词: Abiotic conditions;    Biogenic elements;    Biological process;    Interannual;    Maximum permissible concentration;    Mesotrophic lakes;    Nitrogen and phosphorus;    Water ecosystems;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/320/1/012032/pdf
DOI  :  10.1088/1755-1315/320/1/012032

学科分类：自然科学（综合）

来源: IOP

【 摘 要 】

This study presents the interannual dynamics of biogenic elements (nitrogen and phosphorus) in Lake Arakhley and compares functioning values of the water ecosystem within different types of intra-annual (seasonal) dynamics of the content of biogenic elements and organic matter in low water years and high water years. The research shows tendencies of increasing and decreasing contents of nitrogen and phosphorus. In low water years, organic matter is autochtonous, whereas in high water years its origin is allochtonous. The concentrations of biogenic elements do not exceed the values of maximum permissible concentration in fishery waters which means that eutrophication has not started. It was found that the dynamics of the content of nitrogen and phosphorus is determined by change in abiotic conditions and rate of biochemical and biological processes. The findings provide better understanding how mesotrophic lakes function.