The community structure and seasonal dynamics of p

Authors: Wen Zhao Yuanyi Zhao Qiaohan Wang Mianping Zheng Jie Wei Shan Wang

Publish Date: 2016/02/05

Volume: 34, Issue: 6, Pages: 1143-1157

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Abstract

The seasonal variations in biomass abundance and species composition of plankton in relation to hydrography were studied in the saline Bange Lake northern Tibet China Sampling was carried out between one to three times per month from May 2001 to July 2002 Salinity ranged from 14 to 146 The air and water temperature exhibited a clear seasonal pattern and mean annual temperatures were approximately 48°C and 73°C respectively The lowest water temperature occurred in winter from December to March at 2°C and the highest in June and July at 177°C Fortyone phytoplankton taxa 21 zooplankton and 5 benthic or facultative zooplankton were identified The predominant phytoplankton species were Gloeothece linearis Oscillatoria tenuis Gloeocapsa punctata Ctenocladus circinnatus Dunaliella salina and Spirulina major The predominant zooplankton species included Holophrya actra Brachionus plicatilis Daphniopsis tibetana Cletocamptus dertersi and Arctodiaptomus salinus The mean annual total phytoplankton density and biomass for the entire lake were 452×107 cells/L and 160 mg/L respectively The annual mean zooplankton abundance was 52 162 322 and 57 144 ind/L in the three sublakes The annual mean total zooplankton biomass in Lakes 1–3 was 123 998 and 213 mg/L respectively The annual mean tychoplankton abundances in Bg1 2 and 3 were 47 67 and 654 ind/L The annual mean tychoplankton biomass was 236 016 and 203 mg/L respectively The zooplankton biomass including tychoplankton in the lake was 911 mg/L The total number of plankton species in the salt lake was significantly negatively correlated with salinitySupported by the China Geological Survey Resources No 2002004 the National Natural Science Foundation of China No 30371112 the Liaoning Science and Technology Foundation Nos 002119 20022100 the Special Program for Key Basic Research of Ministry of Science and Technology China No 2014FY210700

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