Plankton community and the relationship with the environment in saline lakes of Onon-Torey plain, Northeastern Mongolia

Saudi Journal of Biological Sciences
Ekaterina Yu Afonina, Natalya A Tashlykova

Abstract

The plankton community of sixteen saline lakes located on Onon-Torey plain (Northeastern Mongolia) during the filling phase and the raising of the water level was investigated in July 2011. Thirty-five taxa of phytoplankton and thirty-one species of zooplankton were found. For phytoplankton, blue-green algae (Merismopedia elegans,Anabaenopsis elenkinii,Arthrospora fusiformis,Spirulina major,Lyngbyasp.,Oscillatoriasp.) and green algae (Monoraphidium minutum,Tetrastrum komarekii,Ankyra ocellata,Oocystissp.) were dominant. For zooplankton,Filinia longiseta, Brachionus plicatilis,B. variabilis,Hexarthra mira(Rotifera),Daphnia magna,Moina brachiata,M. mongolica(Cladocera),Arctodiaptomus bacillifer,Mixodiaptomus incrassatus,Metadiaptomus asiaticus(Copepoda) dominated. Mineralization, active hydrogen ratio, dissolved oxygen and water temperature were the main factors influencing the diversity, structure and distribution of plankton organisms in the steppe lakes during low water level. The RDA analysis for phytoplankton and zooplankton from different lakes was carried out for selected two groups which included lakes and a subset related species. The first group is of oligohaline and mesohaline lakes in which mostly green algae, rotifer...Continue Reading

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