作 者：
孟顺龙;肖代;陈小丽;瞿建宏;李丹丹;范立民;裘丽萍;宋超;陈家长;徐跑
单 位：
江苏省水文水资源勘测局泰州分局;中国水产科学研究院淡水渔业研究中心
关键词：
浮游动物;群落结构;里下河腹地;丰水期;枯水期
摘 要：
为了探究丰枯水期里下河腹地典型水体中浮游动物的群落结构特征,通过布设20个采样站点,于2014年丰水期(7月29日)和枯水期(12月24日)对里下河腹地典型水体进行了2次全面调查,并对水质状况进行了评价。结果表明,里下河腹地典型水体共鉴定出浮游动物21种(包括变种和变型),无节幼体1类;其中轮虫最多,共14种,占浮游动物总种数的66.6%;枝角类次之,共6种,占28.6%;桡足类最少,仅1种,占4.8%;各站点浮游动物种类组成和密度均以轮虫和枝角类为主,数量在5~15种,密度变化在9.8~102.2个/L。浮游动物相似性指数在0.18~0.55,平均为0.36,偏向于轻度相似,表明丰水期与枯水期的生境差异较大。优势种的优势度不高,在0.023~0.297;多样性指数在1.73~3.56,均匀度指数在0.67~0.95,表明丰、枯水期里下河腹地典型水体的浮游动物群落信息含量较大、群落结构处于较稳定状态。浮游动物多样性和水质监测结果均表明,枯水期水质优于丰水期,枯水期水质基本处于清洁状态,丰水期水质基本处于中度污染状态;污染源主要为面源污染,且串场河(6号)、新通扬运河(12号)、喜鹊湖(17号)、兴姜河(18号)受人类活动影响较大。
译 名：
Zooplankton Community Structure and Water Quality Assessment in Typical Water Bodies of the Lixia River Basin in Dry and Wet Seasons
作 者：
MENG Shun-long;XIAO Dai;CHEN Xiao-li;QU Jian-hong;LI Dan-dan;FAN Li-min;QIU Li-ping;SONG Chao;CHEN Jia-zhang;XU Pao;Freshwater Fisheries Research Center,Chinese Academy of Fishery Sciences,Fishery Eco-Evironment Monitoring Center of Lower Reaches of Changjiang River,Ministry of Agriculture,Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Changjiang River,Ministry of Agriculture;Taizhou Sub-bureau of Jiangsu Province Hydrology and Water Resources Investigation Bureau;
关键词：
zooplankton;;community structure;;Lixia River hinterland;;rainy season;;dry season
摘 要：
Lixia River is one of the most important rivers in Jiangsu province and it plays an important role in provincial aquaculture development. However,no research on the zooplankton community structure of Lixia River basin had been reported and basic ecological information on species composition and density are lacking. In this study,the zooplankton community and the physicochemical parameters of typical water bodies in the Lixia River basin were investigated. The study was carried out at 20 sampling stations on July 29th( rainy season) and December24th( dry season) of 2014. The Shannon-Wiener biodiversity index,Mc Naughton predominance index,Pielou evenness index and Jaccard similarity index were used to characterize zooplankton community structure and the single factor index was used to assess water quality. The study will provide scientific evidence for eco-environmental evaluation and support regulation of the Lixia river basin. Twenty-one zooplankton species( including varieties) and1 class of nauplii were recorded: 14 rotifer,6 cladocera and 1 copepoda species,accounting for 66. 6%,28. 6%and 4. 8%,respectively,of the total species. The species number and zooplankton biomass at each sampling station ranged from 5 to 15 species and from 9. 8 to 102. 2 ind/L,with rotifers and cladocerans dominating both species number and biomass at all sampling stations. During the dry season and rainy seasons,the similarity indices of the community structure for each sampling station ranged from 0. 18 to 0. 55,and averaged 0. 36,indicating that the eco-environment differed significantly between dry season and rainy season. A total of five dominant species were found during the rainy season and nine species during the dry season,with the degree of dominance ranging from 0. 023 to 0. 297. The Shannon-Wiener biodiversity index and Pielou evenness index of the zooplankton community during the rainy season and dry season ranged from 1. 73 to 3. 56 and 0. 67 to 0. 95,respectively,indicating that the diversity and uniformity of the zooplankton community were high and that the zooplankton community structure in the Lixia River basin was complex. Water quality in the dry season was better than in the rainy season:clean in the dry season and moderately polluted in the rainy season,based on the results of zooplankton community diversity and water quality monitoring. Non-point sources are the main source of pollution to Lixia River and the Chuanchang River( No. 6),Xintongyang River( No. 12),Xique River( No. 17) and Xingjiang River( No. 18)are seriously affected by human activities.
