摘要
逐月对湖南省大通湖的浮游动物群落结构及环境因子进行了调查,并通过典范对应分析（CCA）,探讨浮游动物群落结构与环境因子之间的关系,以期为其渔业可持续利用提供参考。营养盐水平、营养状态指数（TSIM）及浮游动物优势种特征均表明,大通湖水体处于富营养状态。调查共发现浮游动物20属46种,其中原生动物18种、轮虫19种、枝角类4种、桡足类5种;优势种为中华似铃壳虫（Tintinnopsis sinensis）、裂足臂尾轮虫（Brachionus diversicornis）、前节晶囊轮虫（Asplanchna priodonta）、针簇多肢轮虫（Polyarthra trigla）、长三肢轮虫（Filinia longiseta）、长额象鼻溞（Bosmina longirostris）和英勇剑水蚤（Cyclops strenuus）。浮游动物丰度和生物量年平均值分别为1013±125 ind·L-1和5.12±0.96 mg·L-1,均在10月—次年3月相对较高,4月最低,空间上整体呈现南高北低的分布趋势。多样性指数（H）、丰富度指数（D）和均匀度指数（J）分别为0.31~1.88、0.11~1.39和0.45~0.90。CCA结果表明,水温与总磷是影响大通湖浮游动物群落结构的主要环境因子。推断,鲢、鳙放养与软体动物空间分布特征是影响大通湖浮游动物群落结构的重要生物因素。
In this study,zooplankton and environmental factors in Datong Lake of Hunan Province were investigated monthly. Zooplankton community structure and its relationships with environmental factors were analyzed by canonical correspondence analysis（ CCA） to provide reference for fisheries sustainable utilization in Datong Lake. The characteristics of water nutritional levels,trophic state index（ TSIM） and dominant zooplankton species indicated that the lake was under accelerated eutrophication status. A total of 46 species from 20 genera were identified,which consisted of 18 species of Protozoa,19 species of Rotifera,4 species of Cladoera and 5species of Copepoda. According to the abundance and occurrence,Tintinnopsis sinensis,Brachionus diversicornis,Asplanchna priodonta,Polyarthra trigla,Filinia longiseta,Bosmina longirostris and Cyclops strenuous were considered as the dominant species. The mean annual abundance and biomass of zooplankton were 1013 ± 125 ind · L-1and 5. 12 ± 0. 96 mg · L-1,respectively. The abundance and biomass were both relatively high from October to March 2014,and lowest in April,with a spatial pattern of decreasing from South to North. The Shannon index（ H）,abundance index（ D）,and Pielou index（ J） of the zooplankton community were 0.31-1.88,0.11-1.39,and 0.45-0.90,respectively. The CCA results indicated that water temperature and total phosphorus concentration were the two main environmental factors affecting the zooplankton community structure in the Datong Lake. The stocking of silver carp and bighead carp as well as the spatial distribution pattern of Mollusca might also play an important role in determining the zooplankton community structure in this shallow lake.
出处
《生态学杂志》
CAS
CSCD
北大核心
2016年第3期733-740,共8页
Chinese Journal of Ecology
基金
国家公益性行业(农业)科研专项(201303056和201503108)资助
关键词
浮游动物
生物多样性
群落结构
环境因子
典范对应分析
zooplankton
biodiversity
community structure
environmental factor
canonical correspondence analysis
作者简介
高子涵，女，1990年生，硕士研究生，主要从事水生生物资源与环境方面的研究。E-mail：queenshaidow@163．com
通讯作者E-mail：lideliang80@aliyun．com
