| The relation between distribution of zooplankton and salinity in the Changjiang Estuary |
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| 作者姓名： | 高倩 徐兆礼 庄平 |
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| 作者单位： | Institute of Oceanology Chinese Academy of Sciences，Key and Open Laboratory of Marine and Estuary Fisheries，Ministry of Agriculture of China，East China Sea Fisheries Research Institute，Chinese Academy of Fisheries Sciences，Key and Open Laboratory of Marine and Estuary Fisheries，Ministry of Agriculture of China，East China Sea Fisheries Research Institute，Chinese Academy of Fisheries Sciences，Qingdao 266071，China Key and Open Laboratory of Marine and Estuary Fisheries，Ministry of Agriculture of China，East China Sea Fisheries Research Institute，Chinese Academy of Fisheries Sciences，Shanghai 200090，China Graduate University of Chinese Academy of Sciences，Beijing 100038，China，Shanghai 200090，China，Shanghai 200090，China |
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| 基金项目： | the Major Research Plan of the Natural Science Foundation (NSF) of China，Major Program of NSF of China，Research Project of Shanghai Yangtze Estuarine Natural Reserve for Chinese Sturgeon and Special Research Project of the Ministry of Science and Technology of China |
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| 摘 要： | Seasonal netzplankton samples from stations in the Changjiang (Yangtze River) Estuary were collected from May, 2004 to February, 2005. The dominant species and their contribution to the total zooplankton abundance were determined. Moreover, the relationship between the salinity and abundance was studied with stepwise linear regression. During the whole year, the salinity was positively correlated with the abundance, while the temperature, negatively. Linear regression analysis showed also a high positive correlation with salinity for total abundance in August and November, while in February and May, no obvious relations were found. The most abundant community was composed of neritic and brackish-water species. The North Passage (NP) (salinity <5) was greatly diluted by freshwater while the North Branch (NB) was brackish water with salinity range of 12–28. Consequently, clear decline in abundance of zooplankton was along the estuarine haloclines from the maximum in the area of high salinity to the minimum in the limnetic zone. Total zooplankton abundance and biomass were lower in NP than the NB in all seasons. In short, the salinity influenced the abundance of each species of zooplankton, and ultimately determined the total abundance of zooplankton. Furthermore, a winter peak in the abundance existed, which might be caused by the flourishing of Sinocalanus sinensis, a widely distributed species in the Changjiang Estuary.
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| 关 键 词： | 盐度 长江三角洲 浮游动物 优胜物种 |
| 收稿时间： | 8 October 2010 |
The relation between distribution of zooplankton and salinity in the Changjiang Estuary |
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| Qian?Gao,Zhaoli?Xu,Ping?Zhuang.The relation between distribution of zooplankton and salinity in the Changjiang Estuary[J].Chinese Journal of Oceanology and Limnology,2008,26(2):178-185. |
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| Authors: | Qian Gao Zhaoli Xu Ping Zhuang |
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| Institution: | [1]Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China [2]Key and Open Laboratory of Marine and Estuary Fisheries, Ministry of Agriculture of China, East China Sea Fisheries Research Institute, Chinese Academy of Fisheries Sciences, Shanghai 200090, China [3]Graduate University of Chinese Academy of Sciences, Beijing 100038, China |
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| Abstract: | Seasonal netzplankton samples from stations in the Changjiang (Yangtze River) Estuary were collected from May,2004 to February,2005.The dominant species and their contribution to the total zooplankton abundance were determined.Moreover,the relationship between the salinity and abundance was studied with stepwise linear regression.During the whole year,the salinity was positively correlated with the abundance,while the temperature,negatively.Linear regression analysis showed also a high positive correlation with salinity for total abundance in August and November,while in February and May,no obvious relations were found.The most abundant community was composed of neritic and brackish-water species.The North Passage (NP) (salinity<5) was greatly diluted by freshwater while the North Branch (NB) was brackish water with salinity range of 12-28.Consequently,clear decline in abundance of zooplankton was along the estuarine haloclines from the maximum in the area of high salinity to the minimum in the limnetic zone.Total zooplankton abundance and biomass were lower in NP than the NB in all seasons.In short,the salinity influenced the abundance of each species of zooplankton,and ultimately determined the total abundance of zooplankton.Furthermore,a winter peak in the abundance existed,which might be caused by the flourishing of Sinocalanus sinensis,a widely distributed species in the Changjiang Estuary. |
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| Keywords: | salinity Changjiang (Yangtze River) Estuary zooplankton abundance dominant species |
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