摘要
2009年4-5月对西藏那曲地区12个盐湖进行浮游植物采样调查,共检出浮游植物58种,隶属于6门39属,其中硅藻门种数最多(34种),占浮游植物总种数的58.62%,其次为绿藻门(11种)和蓝藻门(8种)。主要优势种为舟形藻属未定种1种、菱形藻属未定种1种、湖泊鞘丝藻和小形卵囊藻。平均生物密度和生物量分别为9.70×104cells/L和0.162 8 mg/L。分析了西藏盐湖浮游植物区系组成特点,及其与环境因子尤其是含盐量的关系,结果表明:浮游植物物种数、生物密度与生物量均与含盐量存在不显著的负相关关系(P>0.05),在盐湖生态系统中,盐度是决定浮游植物多样性及个体数量的关键因素之一,浮游植物群落结构受众多生态因子共同影响。
The phytoplankton of 12 salt lakes in Naqu region, Tibet had been investigated during April to May in 2009. A total of 58 species of phytoplankton were identified, belonging to 39 genera of 6 phyla. Bacillariophyta （34 species） was dominant in species richness by 58.62 percentage, followed by Cyanophyta （11 species） and Chlorophyta （8 species）. Navicula sp. , Nitzschia sp. , Lyngbya limnetica, Oocystis parva were the main dominant species. The average density and biomass of phytoplankton were 9.70×104 eells/L and 0. 162 8 mg/L, respectively. This paper also discusses the phytoplankton community characteristics of Tibet salt lakes, and the relationship between floristic composition characteristics of phytoplankton and environmental factors, especially the salinity. The results show that the correlationship between phytoplankton species, density, biomass and salinity were not significant （P 〉 0.05）. In salt lakes, the salinity is an important limiting factor in determining the structure of phytoplankton community, and it is controlled by numerous ecological factors.
出处
《上海海洋大学学报》
CAS
CSCD
北大核心
2013年第4期577-585,共9页
Journal of Shanghai Ocean University
基金
上海高校知识服务平台上海海洋大学水产动物遗传育种中心(ZF1206)
上海市重点学科建设项目(S30701)
国土资源部地质调查项目(1212010818056
1212011120982)
关键词
西藏盐湖
浮游植物
群落特征
环境因子
Tibet salt lake
phytoplankton
community characteristics
environmental factors
