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渤海湾曹妃甸围填海工程对大型底栖动物群落的影响 总被引：2，自引：0，他引：2
为研究渤海湾围填海工程对附近海域大型底栖动物群落的影响,利用2013年秋季和2014年春季调查数据,对渤海湾附近海域大型底栖动物群落的物种数、总平均丰度、总平均生物量和生物多样性指数进行分析。结果发现,调查区域的优势类群为多毛类,优势种为凸壳肌蛤(Musculus senhousia)和日本倍棘蛇尾(Amphioplus japonicas),这与渤海湾大型底栖动物群落优势种单一和物种小型化的特征相符。曹妃甸围填海海域与邻近海域的大型底栖动物群落物种数、丰度、生物量和多样性指数均没有显著差异。2014年春季较2013年秋季的大型底栖动物群落多样性稍有所提高,这可能是围填海工程放缓和阶段性施工结束后生物群落在缓慢的恢复。ABC曲线(Abundance/Biomass Curves)分析表明渤海湾大型底栖动物群落均已受到中等程度干扰;M-AMBI指数分析发现曹妃甸围填海区大型底栖动物群落健康状况较差。结合渤海湾围填海面积和历史数据,发现围填海等人类活动已对渤海湾生态环境和大型底栖动物群落造成了不同程度的影响,导致该区域的生态系统受损。受损生态系统的完全恢复需要漫长的过程,受损大型底栖动物群落的次生演替也需要较长的时间,短时间内不会有明显的改善。 相似文献
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To understand the ecological status and macrobenthic assemblages of the Xin'an River Estuary and its adjacent waters, a survey was conducted for environmental variables and macrobenthic assemblage structure in September 2012(Yantai, China). Several methods are adopted in the data analysis process: dominance index,diversity indices, cluster analysis, non-metric multi-dimentional scaling ordination, AMBI and M-AMBI. The dissolved inorganic nitrogen and soluble reactive phosphorus of six out of eight sampling stations were in a good condition with low concentration. The average value of DO((2.89±0.60) mg/L) and p H(4.28±0.43) indicated that the research area faced with the risk of ocean acidification and underlying hypoxia. A total of 62 species were identified, of which the dominant species group was polychaetes. The average abundance and biomass was577.50 ind./m2 and 6.01 g/m2, respectively. Compared with historical data, the macrobenthic assemblage structure at waters around the Xin'an River Estuary was in a relatively stable status from 2009 to 2012.Contaminant indicator species Capitella capitata appeared at Sta. Y1, indicating the animals here suffered from hypoxia and acidification. AMBI and M-AMBI results showed that most sampling stations were slightly disturbed,which were coincided with the abiotic measurement on evaluating the health conditions. Macrobenthic communities suffered pressures from ocean acidification and hypoxia at the research waters, particularly those at Stas Y1, Y2 and Y5, which displays negative results in benthic health evaluation. 相似文献
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