安宁河中游浮游植物群落结构及其与环境因子的关系  

Phytoplankton community structure and its relation to environmental conditions in the middle Anning River,China

作　　者：马宝珊[1] 徐滨[1] 魏开金[1] 朱祥云[1] 徐进[1] MA Bao-shan;XU Bin;WEI Kai-jin;ZHU Xiang-yun;XU Jin(Yangtze River Fisheries Research Institute,Chinese Academy of Fishery Sciences,Wuhan 430223,China).)

机构地区：[1]中国水产科学研究院长江水产研究所,武汉430223

出　　处：《生态学杂志》2020年第10期3332-3341,共10页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(51809280)资助。

摘　　要：为了解安宁河中游浮游植物群落结构及其与环境因子的相关性,分别于2015年7-8月(丰水期)和2016年1-2月(枯水期)对安宁河干、支流浮游植物开展调查,并于2015年7月-2016年6月对安宁河支流浮游植物进行周年调查。结果表明:安宁河中游共检出浮游植物7门53属95种,其中硅藻门居多(64种);丰水期干、支流生物量差别不大,枯水期干流浮游植物的密度和生物量都显著高于支流;安宁河支流全年优势种为曲壳藻属未定种(Achnanthes sp.)、偏肿桥弯藻(Cymbella ventricosa)、桥弯藻属未定种(Cymbella sp.)和扁圆卵形藻(Cocconeis placentula)等;安宁河支流浮游植物密度和生物量都以3月最高,1月最低;丰水期安宁河浮游植物的分布与pH和海拔密切相关,枯水期主要与河宽相关,pH也有一定影响;安宁河支流浮游植物群落结构的周年变化主要与pH、电导和水温相关;溶氧与浮游植物生长的相关性不大。该研究可为高海拔地区河流生物多样性保护提供科学依据。To understand the phytoplankton community structure and its relation to the environmental conditions,two surveys were conducted in the Anning River and its tributaries in July and August 2015(wet season),and January and February 2016(dry season).Sampling was also performed monthly from July 2015 to June 2016 in the tributaries of the Anning River.A total of95 species of phytoplankton belonging to 53 genera of 7 phyla were identified,with Bacillariophyta(64 species)as dominant taxa.There was no significant difference in phytoplankton biomass between the mainstream and the tributaries during the wet season.The density and biomass of phytoplankton in the mainstream were significantly higher than those in the tributaries during the dry season.Across the whole year,the dominant species in the tributaries were Achnanthes sp.,Cymbella ventricosa,Cymbella sp.and Cocconeis placentula.The density and biomass of phytoplankton were the highest in March and the lowest in January.The phytoplankton density was significantly correlated to pH and altitude in the wet season,while it was correlated with the channel width and pH in the dry season.In addition,monthly variations of phytoplankton structure in the tributaries were correlated to pH,conductivity and water temperature.Dissolved oxygen was not associated with phytoplankton growth.This study provides a scientific basis for river biodiversity conservation in high altitude areas.

关 键 词：硅藻 多样性 冗余分析 周年变化 

分 类 号：Q948.8[生物学—植物学]