摘要
2003年7月至2004年4月，每季度对武汉市南湖大型底栖动物进行定量和定性的采样分析，共发现大型底栖动 物30种；优势种为霍甫水丝蚓和刺铗长足摇蚊，均呈聚集分布；大型底栖动物的年均密度和生物量分别为4437 ind/m^2和 17．79 g/m^2，其密度和生物量春季最高，Shannon-Wiener 多样性指数和 Margalef 多样性指数的年均值分别为1．515和 1．123．比较分析了南湖大型底栖动物组成的历史变化，对水环境进行了生物学评价，并提出了南湖大型底栖动物合理利 用的建议．
Abstract： Lake Nanhu （30°30＇N, 114°21 ＇E） situated in Wuhan City, Hubei Pmvince of China, is an eutrophic shallow lake along the middle reaches of Yangtze River, with a main surface area 400 hm^2 of aquaculture. In order to provide academic data for reasonable utilization of aquatic resource and ecological strategy to protect aquatic environment, macmzoobenthos were collected at 10 sampling stations seasonally and some random sampling stations frequently in Lake Nanhu, during the period of investigation from July 2003 to April 2004. A total of 30 species were identified, including 10 species of oligochaeta, 4 mollusca, 14 aquatic insecta, 1 hirudinea and 1 decapoda. Only oligochaeta and aquatic insecta were found at 10 sampling stations. The dominant species were Limnodrilus hoffmeisteri and Tanypus punctipennis, and 1δ - index indicated their distribution were aggregated.
The density and biomass of macrozoobenthos in the lake were 4437 ind/m^2 and 17.79 g/m^2 , respectively. The seasonal change of density was in spring 〉 summer 〉 autumn 〉 winter; and biomass ranked as in spring 〉 winter 〉 summer 〉 autumn. The annual average value of Shannon-Wiener diversity index and the Margalef diversity index were 1. 515 and 1. 123, respectively. Macrozoobenthos was mainly composed of several polluted species, and many macmzoobenthos have disappeared within recent years based on comparing to the former study in Lake Nanhu. The fishery potential production of macrzoobenthos was 1. 504 × 10^4 kg. However, the omnivomus fishes annual stocking was 1.60 × 10^4 kg since 2000, which was unreasonable and should be decreased to 5.0 × 10^3 kg. Lake Nanhu was eutrophicated according to macmzoobenthos communities structure and the content of N, P in water. The water quality was evaluated by the diversities of macrozoobenthos communities structure.
出处
《湖泊科学》
EI
CAS
CSCD
北大核心
2005年第4期327-333,共7页
Journal of Lake Sciences
基金
国家自然科学基金(30470342)教育部博士学科点专项科研基金(20020504001)
关键词
大型底栖动物
群落结构
南湖
多样性
Macrozoobenthos
community structure
Lake Nanhu
diversity
