摘要
于2020年3—10月(春季、夏季和秋季)对刘家峡水库的后生浮游动物和水环境因子进行调查,并通过冗余分析探讨刘家峡水库浮游动物与环境因子之间的关系,以期为刘家峡水库水生态保护和渔业资源的可持续利用提供参考。共鉴定后生浮游动物3类24种,其中轮虫12种、枝角类7种、桡足类5种。夏季后生浮游动物种类最多,为16种,春季最少,11种。优势种为螺形龟甲轮虫、针簇多肢轮虫、前节晶囊轮虫、长额象鼻溞、长刺溞、僧帽溞、汤匙华哲水蚤和无节幼体,季节更替明显。调查期间,后生浮游动物平均密度为31 ind·L^(-1),变化范围在8~116 ind·L^(-1);平均生物量0.280 mg·L^(-1),变化范围在0.056~0.606 mg·L^(-1)。后生浮游动物Shannon多样性指数为0.77~1.87,平均值为1.55;Margalef丰富度指数为1.90~3.07,平均值为2.56;Pielou均匀度指数为0.20~0.55,平均值为0.44;最低值均出现在9月。冗余分析显示,水温、透明度和硝酸氮与后生浮游动物群落结构具有明显相关性。刘家峡水库水体处于贫营养型水平,符合国家Ⅱ类水的水质标准。
We investigated metazooplankton community structure and water environmental factors in Liujiaxia Reservoir from March to October 2020.Metazooplankton community structure and its relationships with environmental factors were analyzed by redundancy analysis,aiming to provide reference for water protection and sustainable utilization of fisheries in Liujiaxia Reservoir.A total of 24 species of zooplankton were identified,including 12 species of rotifers,7 species of cladocerans,and 5 species of copepods.There were 16 species of zooplankton in summer and 11 species in spring.The dominant species were Keratella cochlearis,Polyarthra trigla,Asplanchna priodonta,Daphnia longispina,Daphnia cucullata,Bosmina longirostris,Sinocalanus dorrii and nauplius,with seasonal variations.The density of zooplankton varied from 8 to 116 ind·L^(-1),with an average density of 31 ind·L^(-1).The biomass of zooplankton varied from 0.056 to 0.606 mg·L^(-1),and the average biomass was 0.280 mg·L^(-1).The Shannon index,Margalef richness index,and Pielou evenness index were 0.77-1.87(1.55 on average),1.90-3.07(2.56),and 0.20-0.55(0.44),respectively.The lowest values of all the three diversity indices were found in September.Results of redundancy analysis showed that environmental factors such as water temperature,transparency and nitrate content were significantly related to zooplankton community structure.Water body of Liujiaxia Reservoir was at an oligotrophic level,which accords with the China’s national class Ⅱ water quality standards.
作者
杜岩岩
杨濯羽
杨顺文
苏子郡
史小宁
王太
DU Yan-yan;YANG Zhuo-yu;YANG Shun-wen;SU Zi-jun;SHI Xiao-ning;WANG Tai(Gansu Fisheries Research Institute,Lanzhou 730030,China)
出处
《生态学杂志》
CAS
CSCD
北大核心
2022年第10期1955-1961,共7页
Chinese Journal of Ecology
基金
甘肃省创新基地和人才计划项目(21JR7RA720)
甘肃省省级财政农业资源及生态保护补助资金项目(202001)
甘肃省科技计划项目(20JR5RA100)资助。
关键词
后生浮游动物
群落结构
环境影响
刘家峡水库
冗余分析
metazooplankton
community structure
environmental factor
Liujiaxia Reservoir
redundancy analysis
作者简介
杜岩岩,女,1983年生,高级工程师,主要研究方向为鱼类资源保护。E-mail:273639273@qq.com;通讯作者:王太,E-mail:5279292@qq.com。
