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Assessing the benthic quality status of the Bohai Bay(China)with proposed modifications of M-AMBI

Acta Oceanologica Sinica 2015年第10期34卷 111-121页

作者： CAI Wenqian BORJA Angel LIN Kuixuan ZHU Yanzhong ZHOU Juan LIU Lusan State Environmental Protection Key Laboratory of Estuary and Coastal Environment Chinese Research Academy of Environmental Sciences Marine Research Division AZTI-Tecnalia

Multivariate AZTI＇s Marine Biotic Index （M-AMBI） was designed to indicate the ecological status of European coastal areas. Based upon samples collected from 2009 to 2012 in the Bohai Bay, we have tested the response of variations of M-AMBI, using biomass （M-BAMBI） in the calculations, with different transformations of the raw data. The results showed that the ecological quality of most areas in the study indicated by M-AMBI was from moderate to bad status with the worse status in the coastal areas, especially around the estuaries, harbors and ouffalls, and better status in the offshore areas except the area close to oil platforms or disposal sites. Despite large variations in nature of the input data, all variations of M-AMBI gave similar spatial and temporal distribution patterns of the ecological status within the bay, and showed high correlation between them. The agreement of new ecological status obtained from all M-AMBI variations, which were calculated according to linear regression, was almost perfect. The benthic quality, assessed using different input data, could be related to human pressures in the bay, such as water discharges, land reclamation, dredged sediment and drilling cuts disposal sites. It seems that M-BAMBI were more effective than M-NABMI （M-AMBI calculated using abundance data） in indicating human pressures of the Bay. Finally, indices calculated with more severe transformations, such as presence/absence data, could not indicate the higher density of human pressures in the coastal areas of the north part of our study area, but those calculated using mild transformation （i.e., square root） did.

关键词： macrozoobenthos M-AMBI abundance biomass data transformation ecological status

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

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Frontiers of Environmental Science & Engineering 2012年第2期6卷 246-254页

作者： Baozhu PAN Haijun WANG Hongzhu WANG Zhaoyin WANG State Key Laboratory of Freshwater Ecology and Biotechnology Institute of HydrobiologyChinese Academy of SciencesWuhan 430072China Changjiang River Scieniific Research Institute Wuha~430010China State Key Laboratory of Hydroscience and Engineering Tsinghua UniversityBeijing 100084China

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 and 1.69 g dry weight·m , 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 and 1.38 g dry weight·m , respectively. Macrozoobenthic assemblage was characterized by dominance of collector-gatherers (i.e. oligochaetes). Wet biomass of submersed macrophytes ( ) and phytoplankton chlorophyll concentration ( ) were demonstrated as the key factor structuring macrozoobenthic assemblages in macrophytic and algal lakes, respectively.

关键词： macrozoobenthos assemblage characteristics,environment analyses macrophytic lake algal lake

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