| Macrobenthic community structure in the Changjiang Estuary and its adjacent waters in summer |
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| 作者姓名： | MENG Wei LIU Lusan ZHENG Binghui LI Xinzheng LI Zhongyu |
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| 作者单位： | MENG Wei1，LIU Lusan1，ZHENG Binghui1，LI Xinzheng2，LI Zhongyu31. Chinese Research Academy of Environmental Sciences，Beijing 100012，China2.Institute of Oceanology，Chinese Academy of Sciences，Qingdao 266071，China3.Jiamusi Municipal Environmental Monitoring Station，Jiamusi 154002，China |
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| 基金项目： | 科技部重点基础研究计划项目 |
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| 摘 要： | On the basis of data collected in the summer of 2006 from 27 sampling stations in the Changjiang Estuary and its adjacent waters, the ecological characteristics of macrobenthos and the relationship between the macrobenthos and the environmental factors were studied using hierarchical cluster and non-metric multidimensional scaling (MDS).The biomass, abundance, Shannon-Wiener's and Margalef's indices of the macrobenthos were presented. The results showed that a total of 253 macrobenthic species were found in the research region, and most of them belong to mollusks and polychaetes. The dominant species were Cossurella dimorpha, Eocylichna cylindrella, Episiphon kiaochowwanense, Nassarius semiplicatus, Ocstergrenia variabilis and Sternaspis scutata. The average abundance of the macrobenthos was (313.15±233.4) ind./m2, and the average biomass was (15.2±11.2)g/m2.The distribution patterns of the abundance and biomass of the macrobenthos were similar. The abundance and biomass in the area close to the estuary were lower than those from the area more distant to the estuary; the central part of the research region had higher abundance and biomass than other parts of the research region. In accordance with the results, four macrobenthic communities with distinct spatial differences were identified. The low abundance and biomass in the area close to the estuary should be caused by the high sedimentation rate. The statistical analysis indicated that the depth is the most important factor affecting the distribution of macrobenthos.
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| 关 键 词： | 大型底栖生物 长江河口 生物多样性 群落结构 |
| 收稿时间： | 2007-01-09 |
| 修稿时间： | 2007-06-05 |
Macrobenthic community structure in the Changjiang Estuary and its adjacent waters in summer |
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| MENG Wei,LIU Lusan,ZHENG Binghui,LI Xinzheng,LI Zhongyu.Macrobenthic community structure in the Changjiang Estuary and its adjacent waters in summer[J].Acta Oceanologica Sinica,2007,26(6):62-71. |
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| Authors: | MENG Wei LIU Lusan ZHENG Binghui LI Xinzheng and LI Zhongyu |
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| Institution: | 1.Chinese Research Academy of Environmental Sciences, Beijing 100012, China2.Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China3.Jiamusi Municipal Environmental Monitoring Station, Jiamusi 154002, China |
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| Abstract: | On the basis of data collected in the summer of 2006 from 27 sampling stations in the Changjiang Estuary and its adjacent waters, the ecological characteristics of macrobenthos and the relationship between the macrobenthos and the environmental factors were studied using hierarchical cluster and non-metric multidimensional scaling (MDS).The biomass, abundance, Shannon-Wiener's and Margalef's indices of the macrobenthos were presented. The results showed that a total of 253 macrobenthic species were found in the research region, and most of them belong to mollusks and polychaetes. The dominant species were Cossurella dimorpha, Eocylichna cylindrella, Episiphon kiaochowwanense, Nassarius semiplicatus, Ocstergrenia variabilis and Sternaspis scutata. The average abundance of the macrobenthos was (313.15±233.4) ind./m2, and the average biomass was (15.2±11.2)g/m2.The distribution patterns of the abundance and biomass of the macrobenthos were similar. The abundance and biomass in the area close to the estuary were lower than those from the area more distant to the estuary; the central part of the research region had higher abundance and biomass than other parts of the research region. In accordance with the results, four macrobenthic communities with distinct spatial differences were identified. The low abundance and biomass in the area close to the estuary should be caused by the high sedimentation rate. The statistical analysis indicated that the depth is the most important factor affecting the distribution of macrobenthos. |
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| Keywords: | macrobenthos community structure biodiversity Changjiang Estuary |
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