鄱阳湖大型底栖动物时空演变特征及驱动因素

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Abstract Macrozoobenthos community and environmental variables were investigated at 133 sites in Poyang Lake in July 2019. The relationships between macrozoobenthic community structure and environmental factors were examined. A total of 48 species belonging to 7 classes, 16 orders, 22 families and 38 genera were recorded. The average density and biomass of macrozoobenthos were 158.38 ind/m² and 173.76g/m², respectively, mainly dominated by Corbicula fluminea,Parafossarulus eximius and Bellamya aeruginosa. In terms of spatial patterns, the whole lake was divided into five areas, including northern, northwest, central, eastern and southern lake areas. One-way ANOVA analysis detected significant differences of physicochemical variables among the five lake areas, while no significant differences in sediment parameters. The community structure of benthic animals among the five lake areas also varied significantly as indicated by one-way analysis of similarity (ANOSIM). Regarding to biodiversity indexes, significantly higher values in northern lake were found than those in other lake areas. Canonical correspondence analyses (CCA) showed that water depth, dissolved oxygen, turbidity, total phosphorus, chlorophyll a, loss on ignition, and sediment type were significantly related to the community structure of macrozoobenthos. In the long term, the biodiversity of macrozoobenthos in Poyang Lake has declined significantly compared with those in their historical condition, with the dominated species changed from large molluscs to small molluscs and insects. Sand mining, changes in hydrological conditions and decline of aquatic vegetation were the main environmental factors regulating the spatiotemporal succession of the macrozoobenthic community structure in Poyang Lake.

Key words： Poyang Lake macrozoobenthos community structure biodiversity environmental factors

Received: 20 September 2020

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X171

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	Articles by authors
	ZOU Liang-hua
	ZOU Wei
	ZHANG Qing-ji
	LI Ying
	GONG Zhi-jun
	ZHANG Yan-jie
	LU Shun-bao
	CAI Yong-jiu

Cite this article:

ZOU Liang-hua,ZOU Wei,ZHANG Qing-ji等. Characteristics and driving factors of spatiotemporal succession of macrozoobenthos in Poyang Lake[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(6): 2881-2892.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I6/2881

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