摘要
为了探明沙湖浮游动物密度、生物量、分布与水环境因子之间的关系,运用多元逐步回归分析、通径分析和典范对应分析方法对2009年4月、7月、10月、2010年1月测定的沙湖浮游动物密度、生物量数据与水环境因子进行多元分析。结果表明:沙湖浮游动物密度与叶绿素a含量、总氮、总磷之间呈显著线性相关,影响沙湖浮游动物密度的主要水环境因子依次为叶绿素a含量、总氮、总磷;浮游动物生物量与叶绿素a含量、总氮、透明度、化学需氧量(CODMn)之间呈显著线性相关,影响浮游动物生物量的主要水环境因子依次为叶绿素a含量、总氮、透明度、化学需氧量;叶绿素a含量和总氮对浮游动物的直接影响作用最强,其他水环境因子主要通过影响叶绿素a含量间接影响浮游动物密度及生物量。浮游动物与水环境因子的CCA排序结果将分别适应不同水环境的16种浮游动物分为3组,叶绿素a含量、化学需氧量、水温和总磷是影响沙湖浮游动物群落特征及时空分布的主要水环境因子。
Multiple stepwise regression analysis,path analysis and canonical correspondence analysis were employed to study the relationships between the zooplankton density,biomass,and distribution and the water environmental factors in Shahu Lake,Ningxia of Northwest China in April,July,and October 2009 and January 2010.The zooplankton density had significant linear correlations with the chlorophyll a,total nitrogen（TN）,and total phosphorous（TP） concentrations in the Lake,and the significance was in the order of chlorophyll a,TN and TP.The zooplankton biomass had significant linear correlations with chlorophyll a and TN concentrations,SD,and CODMn,and the significance was in the order of chlorophyll a,TN,SD and CODMn.The chlorophyll a and TN concentrations had the strongest direct effect on the zooplankton,whereas the other water environmental factors had indirect effect on the zooplankton by influencing chlorophyll a concentration.Based on canonical correspondence analysis,the 16 zooplankton species adapted to different water environments in the Lake were divided into 3 groups.Chlorophyll a,CODMn,temperature and TP were the main water environmental factors affecting the community structure and the spatiotemporal distribution of the zooplankton in the Lake.
出处
《生态学杂志》
CAS
CSCD
北大核心
2012年第4期896-901,共6页
Chinese Journal of Ecology
基金
宁夏自然科学基金项目(NZ0829
NZ0929)资助
关键词
浮游动物
密度
生物量
多元逐步回归分析
通径分析
典范对应分析
zooplankton
density
biomass
multiple stepwise regression analysis
path analysis
canonical correspondence analysis.
