Macrozoobenthic assemblages in relation to environments of the Yangtze-isolated lakes

doi:10.1007/s11783-011-0381-8

Front Envir Sci Eng

0, Vol.

Issue () : 246-254 https://doi.org/10.1007/s11783-011-0381-8

RESEARCH ARTICLE

Macrozoobenthic assemblages in relation to environments of the Yangtze-isolated lakes

Baozhu PAN^1,2, Haijun WANG¹, Hongzhu WANG¹(

), Zhaoyin WANG³

1. State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; 2. Changjiang River Scientific Research Institute, Wuhan 430010, China; 3. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China

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Abstract

Eutrophication can shift lakes from a clear, macrophyte-dominated state to a turbid, algae-dominated state, and different habitat condition supports different fauna. Macrozoobenthos are good indicators of water environment, and studies on macrozoobenthic assemblage characteristics can help us to know which state a lake is in, thus provide the basis for its eutrophication control. In this study, a systematic investigation on macrozoobenthos was conducted in 17 Yangtze-isolated lakes to explore the macroecological laws of macrozoobenthic assemblages. Detrended correspondence analysis (DCA) revealed that variance of benthic assemblage structure occurred in two types of lakes. In macrophytic lakes, altogether 51?taxa of macrozoobenthos were identified. The average density and biomass of total macrozoobenthos were 2231?individuals·m^-2 and 1.69 g dry weight·m^-2, respectively. Macrozoobenthic assemblage was characterized by dominance of scrapers (i.e. gastropods). In algal lakes, altogether 20 taxa of macrozoobenthos were identified. The average density and biomass of total macrozoobenthos were 2814 individuals·m^-2 and 1.38 g dry weight·m^-2, respectively. Macrozoobenthic assemblage was characterized by dominance of collector-gatherers (i.e. oligochaetes). Wet biomass of submersed macrophytes (B_Mac) and phytoplankton chlorophyll a concentration (Chla) were demonstrated as the key factor structuring macrozoobenthic assemblages in macrophytic and algal lakes, respectively.

Keywords macrozoobenthos assemblage characteristics environment analyses macrophytic lake algal lake

Corresponding Author(s): WANG Hongzhu,Email:wanghz@ihb.ac.cn

Issue Date: 01 April 2012

Cite this article:

Baozhu PAN,Haijun WANG,Hongzhu WANG, et al. Macrozoobenthic assemblages in relation to environments of the Yangtze-isolated lakes[J]. Front Envir Sci Eng, 0, (): 246-254.

URL:

https://academic.hep.com.cn/fese/EN/10.1007/s11783-011-0381-8
https://academic.hep.com.cn/fese/EN/Y0/V/I/246

Fig.1 Distribution of studied lakes along the Yangtze River. Lakes 1-8 are situated in the suburban regions, and these macrophytic lakes are as follows: HHL, Honghu Lake (Lake 1, 8 sites); LHL, Luhu Lake (Lake 2, 8 sites); NBZL, Nanbeizui Lake (Lake 3, 6 sites); NSL, Niushan Lake (Lake 4, 7 sites); QDL, Qiaodun Lake (Lake 5, 4 sites); TJDL, Taojiada Lake (Lake 6, 3 sites); XSHL, Xiaosihai Lake (Lake 7, 10 sites); ZDL, Zhangdu Lake (Lake 8, 6 sites). Lakes 9-17 are situated in the urban regions, and these algal lakes are as follows: GHL, Gehu Lake (Lake 9, 7 sites); HXL, Hongxing Lake (Lake 10, 4 sites); LYL, Longyang Lake (Lake 11, 6 sites); MSL, Moshui Lake (Lake 12, 5 sites); NHL, Nanhu Lake (Lake 13, 7 sites); NTZL, Nantaizi Lake (Lake 14, 6 sites); QLL, Qingling Lake (Lake 15, 3 sites); SJL, Sanjiao Lake (Lake 16, 3 sites); SLQL, Sanliqi Lake (Lake 17, 4 sites)

Tab.1 Basic morphometric and main environmental parameters of the studied lakes

Tab.2 Limnological parameters of the studied lakes, with probability levels () determined by Unequal N HSD test after one-way ANOVA

Fig.2 Ordination diagram of sampling lakes by detrended correspondence analysis (DCA) based on abundance of macrozoobenthos.□, macrophytic lakes; ○, algal lakes. The meanings of abbreviative letter of sampling lakes are presented in Fig. 1

Fig.3 Density (, individuals·m) and biomass (, g dry weight·m) (mollusks without shells) of each taxonomic group of macrozoobenthos in macrophytic and algal lakes of the Yangtze basin

Fig.4 Density (, individuals·m), biomass (, g dry weight·m) (mollusks without shells) of each functional feeding group of macrozoobenthos in macrophytic and algal lakes of the Yangtze basin

Tab.3 Density (, individuals·m), biomass (, g dry weight·m) (mollusks without shells) and percentage of dominant taxa in macrophytic and algal lakes of the Yangtze basin

Fig.5 CCA biplots of species-environments. Major environmental variables influencing abundance and distribution of macrozoobenthos in macrophytic lakes (a) and in algal lakes (b) are presented. Environmental parameters: , development of lake volume; , water depth (m); , Secchi depth (m); TN, total nitrogen concentration of water (mg·m); , phytoplankton chlorophyll concentration (mg·m); , wet biomass of submersed macrophytes (g·m)

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