摘要
开展浮游动物群落时空分布和环境因子等调查,评价鱼类饵料生物资源和水生态现状,为连环湖水生态环境保护和渔业资源可持续利用提供科学依据。2018年6月-2019年5月,在连环湖阿木塔与牙门喜湖区共设置8个采样点,进行为期1年的调查。共检出浮游动物75种,其中原生动物20种、轮虫21种、枝角类15种、桡足类19种;优势种16种,其中原生动物12种、轮虫和枝角类各1种、桡足类2种;浮游动物群落结构趋于小型化。浮游动物年均丰度为1 060个/L,年均生物量为2.93 mg/L,夏季平均丰度与生物量最大。Shannon-Wiener多样性指数、Pielou均匀度指数和Margalef丰富度指数年均值分别为1.09、0.36和1.56,多样性因季节不同而有所变化,各样点间并不存在明显差异。相关性分析显示,水温和DO是影响连环湖两湖区浮游动物群落结构变化的决定性因子,pH是影响浮游动物种类、丰度的重要正相关因子,透明度为负相关因子。冗余分析(RDA)显示,TN、TLI和叶绿素a也是影响浮游动物群落结构的重要因素。水体理化指标和多样性指数的综合评价结果表明,连环湖阿木塔与牙门喜湖区水质状况整体为α-中污型、轻度富营养水平。
Lianhuan Lake is located in Daqing City,Heilongjiang Province and consisted of 18connected lakes with a total area of 556.08km 2,the largest alkaline lake and primary fishery of northeast China.In this study,we explored the spatiotemporal distribution of the zooplankton community and analyzed its re-lationship with environmental factors in Lianhuan Lake.The objectives were to evaluate the food organism resources of fish,the status of hydroecology,and provide scientific evidence for conserving the aquatic e-cology and sustainably developing fishery resources.From June 2018to May 2019,a seasonal investigation of zooplankton was carried out at eight sampling sites in Amuta and Yamenxi Lakes and included measure-ment of environmental factors,including pH,water temperature(WT),transparency(SD)chlorophyll a(Chl-a),dissolved oxygen(DO),total nitrogen(TN)and total phosphorus(TP).A total of 75zooplank-ton species were identified,including 20protozoans,21rotifers,15cladocerans and 19copepods.Domi-nant species included 12protozoans,1rotifer,1cladoceran and 2copepods.The zooplankton community structure displayed a trend towards miniaturization.The annual average abundance and biomass of zoo-plankton were 1060ind/L and 2.930mg/L and both were higher in summer than in other seasons.The an-nual Shannon-Wiener diversity,Pielou evenness and Margalef richness indices of the zooplankton commu-nity averaged,respectively,1.09,0.36and 1.56.Zooplankton diversity also varied seasonally,but differ-ence among the eight sampling sites was not significant.Correlation analysis showed that WT and DO were the major environmental factors affecting zooplankton community structure.Zooplankton species and a-bundance were positively correlated with pH and negatively correlated with SD.RDA shows that the zoo-plankton community was also related to TN,Chl-a and the comprehensive trophic level index(TLI).O-verall,the diversity indices indicatedα-mesosaprobic conditions and the TLI indicated that Lianhuan Lake was mesotrophic.
作者
陈昕
李喆
唐富江
齐妍
高文燕
鲁万桥
CHEN Xin;LI Zhe;TANG Fu-jiang;QI Yan;GAO Wen-yan;LU Wan-qiao(National Demonstration Center for Experimental Fisheries Science Education,Shanghai Ocean University,Shanghai 201306,P.R.China;Heilongjiang River Fisheries Research Institute,Chinese Academy of Fishery Sciences,Harbin 150070,P.R.China;Centre for Research on Environmental Ecology and Fish Nutrition(CREEFN)of the Ministry of Agriculture,Shanghai Ocean University,Shanghai 201306,P.R.China)
出处
《水生态学杂志》
CSCD
北大核心
2020年第6期89-97,共9页
Journal of Hydroecology
基金
中央级科研院所基本科研业务费项目(HSY201806M)。
关键词
连环湖
浮游动物
相关性分析
RDA分析
水质评价
Lianhuan Lake
zooplankton
correlation analysis
RDA analysis
water quality evaluation
