The response of benthic macroinvertebrate communities to environmental pressures in streams and rivers: A case study of Taihu and Chaohu Basins

被引：2
|
作者：
Zhang Y. [1 ]
Cai Y. [1 ]
Zhang Y. [1 ]
Gao J. [1 ]
Li K. [1 ,3 ]
机构：
[1] State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing
[2] Water Resources Planning Bureau of Jiangsu Province, Nanjing
[3] Sino-Danish College, University of Chinese Academy of Sciences, Beijing
来源：
Hupo Kexue/Journal of Lake Sciences | 2021年 / 33卷 / 01期
关键词：
Benthic macroinvertebrate; Chaohu Basin; Generalized additive models; Response curves; Taihu Basin;
D O I：
10.18307/2021.0111
中图分类号：
学科分类号：
摘要：
This study seeks to clarify the response of benthic macroinvertebrate communities to environmental pressures in streams and rivers, and two regions with different degrees of human disturbance, i.e. Taihu Basin and Chaohu Basin, were chosen as the study area. Benthic macroinvertebrate communities in these two regions were investigated, as well as the physicochemical conditions of the water and sediment and habitat condition. Spatial analysis and multivariate statistical analysis were used to explore how macroinvertebrates respond to the environmental variables. The results showed that the environmental quality and the benthic macroinvertebrate communities were significantly different in these two basins, indicating that different disturbance intensities had different effects on the ecological environment and benthic macroinvertebrates. The habitat quality of Chaohu Basin was better than that of Taihu Basin. Besides, nutritional concentrations in the plain area of Chaohu Basin, especially the nitrogen concentration were higher than that in the plain area of Taihu Basin. The hilly area of Chaohu Basin has more sensitive species (e.g. aquatic insects) and less pollution-tolerant species (e.g. oligochaetes) than Taihu Basin, and the plain area of Chaohu Basin has much higher abundance of oligochaetes (mainly Limnodrilus hoffmeisteri and Branchiura sowerbyi) than Taihu Basin. Based on generalized additive model, response curves showed that habitat diversity and total nitrogen can be used as indicators for taxa richness and biodiversity. Characteristic species, such as Bellamya aeruginosa, Radix swinhoei, Corbicula fluminea, L. hoffmeisteri, B. sowerbyi, Chironomus flaviplumus, could be used as environmental monitoring indicators due to their response to specific environmental factors. The response curves can reveal the relationship between benthic macroinvertebrate communities and water quality, nutritional status and habitat quality, which can be used to predict benthic macroinvertebrate communities and succession process under different human disturbances. © 2021 by Journal of Lake Sciences.
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页码：204 / 217
页数：13
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