|Table of Contents|

The littoral zone macroinvertebrate distribution in relation to environment variables in the lower Yangtze River Channel from Nanjing to the estuary

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

2019 03
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The littoral zone macroinvertebrate distribution in relation to environment variables in the lower Yangtze River Channel from Nanjing to the estuary
WU Cong1 XU Jing2 YIN Senlu2 TAN Chaozhong1 CHEN Kai1 GAO Jin1 & WANG Beixin1**
1 Laboratory of Aquatic Insects and Stream Ecology, Department of Entomology, Nanjing Agricultural University, Nanjing 210095, China 2 Biodiversity Research Center, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Mollusca nereid water physical-chemical variable habitat biodiversity conservation

Macroinvertebrates are promising indictors for the elucidation of community distribution patterns in relation to environmental variables in the lower Yangtze River channel. We conducted a survey on the littoral zone macroinvertebrates, water physical-chemical variables, and habitat quality of 43 sites distributed in 6 sections from Nanjing down to the estuary in April 2017. Our goal was to examine the macroinvertebrate distribution pattern and explore the potential drivers in the lower Yangtze River channel. A total of 63 taxa belonging to 35 families, 17 orders, 3 classes, and 7 phyla, and were recorded and Arthropoda and Mollusca were dominant groups and Limnodrilus sp. was the dominant species. Interestingly, Dentinephtys glabra, previously recorded in the estuary only, was a common species of nereid from the estuary up to Nanjing. In terms of the species richness, the Shannon-Wiener index has conducted in 6 sections, Zhenjiang had the highest richness with 31 and a diversity index of 1.71, followed by Jiangyin, and the north branch of the estuary had the lowest richness of 12 and diversity index of 0.90. Results of canonical correspondence analysis showed that water pollution, habitat degradation or loss, and shipping were the major factors influencing the macroinvertebrate distribution. The distribution pattern of macroinvertebrates was highly influenced by human activities, and water pollution control and habitat restoration were equally important for the conservation of macroinvertebrate diversity in the lower Yangtze River channel.


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Last Update: 2019-06-25