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当前位置: 首页 > 文章 > 抚仙湖冬-春季浮游植物群落结构变化及其影响因子识别 海洋湖沼通报 2016 (6) 87-98
Position: Home > Articles > Ldentification of Phytoplankton Community Changes and Environmental Factors During the Winter-spring Transition in Fuxian Lake Transactions of Oceanology and Limnology 2016 (6) 87-98

抚仙湖冬-春季浮游植物群落结构变化及其影响因子识别

作  者：
蒋伊能;张涛;陈丽;李天丽;赵帅营
关键词：
抚仙湖;浮游植物;群落结构;环境因子
摘  要：
抚仙湖是我国第二大深水湖泊,目前总体处于贫营养状态。本研究于2015年1月~3月对抚仙湖冬-春季转换期间浮游植物群落结构进行空间调查,探讨冬春季转换期间浮游植物变化与环境因子的关系,以期为抚仙湖生态保护提供科学依据。本次研究共鉴定出浮游植物6门39属53种,绿藻门种数最多。浮游植物优势种在时间上出现明显的变化特征。浮游植物生物量和物种丰富度随时间呈现上升趋势,香农指数和均匀度指数在早春季节最低,这与3月硅藻门的小环藻优势度大成为绝对的优势种有关。空间上南部湖区和北部湖区浮游植物群落结构在2月和3月存在显著差异,而生物量仅在3月出现显著差异且北部偏高,物种丰富度和香农指数在1月出现显著差异且南部湖区偏高。Pearson相关分析表明浮游植物生物量与总磷、水温、溶解氧、电导率以及总溶解性固体显著正相关,与透明度显著负相关(P<0.001);冗余分析(RDA)和方差分解分析的结果表明总磷、温度、pH、电导率以及总溶解性固体解释了抚仙湖冬-春季浮游植物群落时空变化的31.9%,其中总磷和温度是主要的影响因子。
译  名：
Ldentification of Phytoplankton Community Changes and Environmental Factors During the Winter-spring Transition in Fuxian Lake
作  者：
JIANG Yineng;ZHANG Tao;CHEN Li;LI Tianli;ZHAO Shuaiying;ZHANG Hucai;CHEN Guangjie;Provincial Key Laboratory of Plateau Geographical Processes and Environmental Change,School of Tourism and Geography,Yunnan Normal University;Institute of Hydrobiology,Chinese Academy of Sciences;
关键词：
Fuxian Lake;;Phytoplankton;;Community structure;;Environmental factors
摘  要：
Fuxian Lake,the second deepest lake in China,is currently an oligotrophic large system.We conducted a spatial survey on the variation of phytoplankton from January to March in 2015 to uncover the spatio-temporal pattern of phytoplankton changes and their relationship with environmental factors.A total of 53 algal species belonging to 6phyla and 39 genera were identified.Chlorophyta was generally dominant,followed by Bacillariophyta,Cyanophyta,Cryptophyta,Chrysophyta and Pyrrophyta,with dominant taxa showing strong temporal variations.Phytoplankton biomass and species richness displayed an increasing trend over the sampling months.The Shannon and Pielou indices showed that the diversity and evenness values decreased to a minimum in March,possibly due to the absolute dominant species of Cyclotellasp.Over space,phytoplankton community structure displayed significant dissimilarity in both February and March and there existed significant difference in algal biomass only in March with higher biomass found in the north basin.In comparison,significant difference in species richness and Shannon index was found in January with higher diversity values observed in the south of the lake basin.The Pearson correlation analyses showed that algal biomass was positively and significantly correlated with lake water TP,water temperature,dissolve oxygen,conductivity and total dissolved solid,but had a significantly negative correlation with water transparency.Redundancy and variation partitioning analyses showed that TP concentrations and water temperature were the main environmental factors in driving the change of phytoplankton during the winter to spring transition across sites.

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