浙江水源地水库浮游动物丰度和生物量与水质参数的通径分析  

PATH ANALYSIS OF ZOOPLANKTON ABUNDANCE AND BIOMASS WITH WATER QUALITY PARAMETERS IN WATER SOURCE RESERVOIRS,ZHEJIANG PROVINCE

作　　者：李共国[1] 徐杭英[2] 于海燕[2] 俞建[2] 韩明春[2] LI Gong-Guo;XU Hang-Ying;YU Hai-Yan;YU Jian;HAN Ming-Chun(Zhejiang Provincial Top Key Discipline of Biological Engineering,Zhejiang Wanli University,Ningbo 315100,China;Zhejiang Environment Monitoring Center,Hangzhou 310007,China)

机构地区：[1]浙江万里学院 [2]浙江省环境监测中心,杭州310007

出　　处：《水生生物学报》2019年第1期165-172,共8页Acta Hydrobiologica Sinica

基　　金：浙江省重中之重学科开放基金(ZS2018005)资助~~

摘　　要：为探明浙江水源地水库浮游动物群落特征及与环境因子的关系,达到用浮游动物群落参数监测水源地水库水质的目的。于2014年1月至2016年10月,对10个饮用水源地水库(K1—K10)展开了水质参数、浮游动物丰度和生物量的季节调查。采用多元逐步回归与通径分析的方法,研究了浙江水源地水库环境因子与浮游动物群落之间的相互关系和作用过程。结果表明, 2014—2016年水库浮游动物平均密度97.5 ind./L,主要由桡足类无节幼体(占36.3%)、轮虫(28.4%)和剑水蚤(20.0%)组成。平均生物量289.3μg/L,主要由枝角类(占39.3%)、剑水蚤(29.0%)和哲水蚤(14.5%)组成。Chl. a含量是春、夏季水库浮游动物丰度的决策因子, TP含量是秋、冬季群落丰度波动的限制因子,春季TN通过N﹕P比率影响群落丰度。DO含量是冬季和夏季水库浮游动物生物量发展的决策因子,冬季DO通过降低N﹕P比促进群落生物量发展。水库浮游动物现存量受到了TP含量消长、N﹕P比率变化,以及最终反映的水体Chl.a含量共同影响。In order to understand the community characteristics of zooplankton and relationships with environmental factors,and aimed to use zooplankton community parameters monitoring the water quality of water source reservoirs,a seasonal investigation was conducted on the water quality parameters,abundance and biomass of zooplankton in water source reservoirs(K1-K10)from January,2014 to October,2016 in Zhejiang Province.The relationships and action mechanism between water environment factors and zooplankton abundance and biomass were studied by the method of multiple stepwise regression and path analysis.The results showed that the average abundance of zooplankton in the reservoirs was 97.5 ind./L from 2014 to 2016,mainly composed of copepods nauplii(36.3%),Rotifer(28.4%)and Cyclops(20.0%).The average biomass was 289.3μg/L,which was mainly composed of Cladocera(39.3%),Cyclops(29.0%)and Cyclops(14.5%).Chl.a content was the decisive factor of zooplankton abundance in spring and summer,and TP content was the limiting factor for fluctuation of community abundance in autumn and winter,and the community abundance was affected by TN through N﹕P ratio in spring.DO content was a decisive factor in the development of zooplankton biomass in winter and summer,and the community biomass was promoted by DO through reducing N﹕P ratio in winter.The present zooplankton stock in the reservoirs was affected by the fluctuation of TP content,the change of N﹕P ratio and the Chl.a content of the water body ultimately reflected.

关 键 词：水库 浮游动物 丰度 生物量 水质参数 通径分析 

分 类 号：S932.8[农业科学—渔业资源]