生态环境学报Issue(8)：1310-1316,7.
平原河网地区大型底栖动物群落结构及其与环境因子的关系
Characteristics of macrobenthos community structure and its relationship to environmental factors within a typical plain river network
摘要
Abstract
Benthic macroinvertebrates are abundant in the streams and lakes. Since most of them have sessile mode of lives or limited migration distance, their species and numbers are important parameters to access the habitat environmental quality. Collection of macroinvertebrates biosurvey data has worldwidely been used as a routine approach by most water quality agencies. The communities of benthic macroinvertebrate have distinct geographical characteristics, correspondingly reflecting the quality of natural environment and socio-economic development of surronding regions. To understand and characterize the benthic biota and elucidate their adaptive responses to environmental factors, we investigated benthic macroinvertebrate fauna at 83 sites in Shanghai city, which is a representative plain river network. In total, we found 20 taxa of the benthic macroinvertebrate: 10 Mollusca, 6 Arthropoda and 4 Annelida. Our data showed that macrobenthos community structure processed typical characteristics including simple composition, low species richness and high pollution-tolerant. Among all species, Arthropoda was found to be the most frequently detected one with highest population density. The spatial heterogeneity of macrobenthos community was linked to the regional extents of urbanization level, respectively. From the downtown area to suburb or rural areas, the number of species increased from 11 to 15 while habitat density decreased from 8776.3/m2 to 690.3/m2. Moreover, it exhibited high degree of correlation between the physicochemical indicators of water quality and the spatial distribution of macrobenthos fauna. Most species of Arthropoda are high pollution-tolerants and were absolutely dominant in the downtown area with heavier organic pollution and lower dissolved oxygen. In contrast, the species of Mollusca and Annelida predominated in the suburb and rural areas with lighter pollution and higher dissolved oxygen level. The significant negative correlation was found between population density of Oligochaetes and dissolved oxygen concentration. Taken together, Mollusks are indicator species showed relatively healthy aquatic environment and annelids such as oligochaetes are indicator species indentifying organic polluted and low-DO environments.关键词
大型底栖无脊椎动物/群落结构/环境因子/河道/平原河网地区Key words
benthic macroinvertebrate/community structure/environmental factors/rivers plain river network分类
生物科学引用本文复制引用
陈小华,高伟,刘文亮,孙从军,康丽娟..平原河网地区大型底栖动物群落结构及其与环境因子的关系[J].生态环境学报,2013,(8):1310-1316,7.基金项目
上海市城市化生态过程与生态恢复重点实验室开放课题基金项目(SHUES2013B01) （SHUES2013B01）
