| 长江口大型底栖动物群落的演变过程及原因探讨 |
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| 引用本文： | 刘录三,郑丙辉,李宝泉,蔡文倩,韩庆喜,林岿璇.长江口大型底栖动物群落的演变过程及原因探讨[J].海洋学报,2012,34(3):134-145. |
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| 作者姓名： | 刘录三 郑丙辉 李宝泉 蔡文倩 韩庆喜 林岿璇 |
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| 作者单位： | 1.中国环境科学研究院 国家环境保护河口与海岸带环境重点实验室, 北京 100012 |
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| 基金项目： | 国家环保公益性行业科研专项(2008467041)。 |
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| 摘 要： | 根据近30年来的长江口大型底栖动物群落的历史资料,以及2009年和2010年的现场调查数据,从长江口底栖动物群落结构变化特征出发,分析了其长期演变的过程和规律,旨在阐明底栖动物群落的演变趋势,识别其重要演变时段。同时结合长江口海域近50~60年来的入海径流量和携沙量变化、营养盐和DO等水质特征变化,分析底栖动物群落的变化原因。分析结果表明,长江口底栖生物群落的变化可大体分为3个阶段,第一阶段是20世纪90年代之前,底栖生物群落无论物种数、生物量都维持相对较高的水平;第二阶段发生在20世纪90年代初至2005年,由于受到气候变化和人类活动的综合影响,底栖生物群落的上述指标都有所降低,表明受到自然和人为因素干扰的加剧;第三阶段是2005年之后至现在,由于长江口水域的各项生态环境保护措施加强,底栖生物群落得到一定程度的恢复。通过对长江口海域各种环境因素的分析表明,底栖生物群落变化受到长江口区域生物因素和非生物因素的共同影响,变化趋势也与环境因素的变化比较吻合。
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| 关 键 词： | 大型底栖动物 群落演变 长江口 |
| 收稿时间： | 2011/6/20 0:00:00 |
| 修稿时间： | 2011/10/21 0:00:00 |
Long-term trends of macrobenthos in Changjiang Estuary, China in relation to environmental changes |
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| LIU Lusan,ZHENG Binghui,LI Baoquan,CAI Wenqian,HAN Qingxi and LIN Kuixuan.Long-term trends of macrobenthos in Changjiang Estuary, China in relation to environmental changes[J].Acta Oceanologica Sinica (in Chinese),2012,34(3):134-145. |
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| Authors: | LIU Lusan ZHENG Binghui LI Baoquan CAI Wenqian HAN Qingxi and LIN Kuixuan |
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| Affiliation: | 1.State Environmental Protection key Laboratory of Estuary and Coastal Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China2.Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China3.State Environmental Protection key Laboratory of Estuary and Coastal Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;College of Water Sciences, Beijing Normal University, Beijing 100875, China |
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| Abstract: | The macrobenthos samples collected from Changjiang Estuary, China in 2009 and 2010 were identified to clarify the current state, and the historical data obtained from essentially the same sampling area were analyzed to get the long-term trends and their response to environmental changes over the past 30 years. The average total species number exhibited an obvious fluctuation over this 30 year period, which includes three periods, e.g., period one-before 1990s, the total species number maintained relatively high value; period two-from 1990s to 2005, the total species number decreased markedly; and period three-after 2005, the total species number increased rapidly. The average biomass and the abundance also had similar trends over the last 30 years. The trends of species composition of macrobenthos community was that some long-lived, larger sized, stress intolerant resident species had been replaced by some opportunistic, short-lived, small sized taxa, especially some opportunistic polychaeta species, which indicated the macrobenthos community of the study area was unhealthy and unstable. The results of MDS ordination also approximately coincide with the above results. The integrated impacts both from climate changes and from anthropogenic disturbances, such as aquaculture, coastal land reclamation and sewage discharge were the triggers for these long-term changes. |
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| Keywords: | macrobenthos long-term trends Changjiang Estuary |
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