| Assessment of trophic status in Changjiang （Yangtze） River estuary |
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| 引用本文： | 王保栋.Assessment of trophic status in Changjiang （Yangtze） River estuary[J].中国海洋与湖沼学报,2007,25(3):261-269. |
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| 作者姓名： | 王保栋 |
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| 作者单位： | The First |
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| 基金项目： | 国家高技术研究发展计划(863计划);国家海洋局海洋生态系统与生物地球化学重点实验室基金 |
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| 摘 要： | The integrated methodology for the assessment of estuarine trophic status (ASSETS), which was extended and refined from the United States National Estuarine Eutrophication Assessment (NEEA), is a multi-parameter assessment system and has been widely used in eutrophication assessment in estuarine and coastal waters. The ASSETS was applied to evaluate the trophic status of the Changjiang (Yangtze) River estuary, one of the largest estuaries in the world. The following main results were obtained: (i) The estuarine export potential is "moderate susceptibility" due to the "moderate" dilution potential and "moderate" flushing potential; (ii) The overall human influence (OHI) index classified the impact of nutrients in the system as "high" due to the high level of nutrient discharge by the river which channels anthropogenic impacts in the catchments to the estuarine system; (iii) The overall eutrophic condition (OEC) in the estuary was classified into the "high" category due to frequent occurrence of nuisance and toxic algal blooms in the mixing and seawater zones; (iv) Since the nutrient loadings (e.g., DIN) in the river is expected to continue to increase in the near future following the population increase and rapid economic growth throughout the drainage basin, the nutrient-related symptoms in the estuary are likely to substantially worsen, which leads to the "worsen high" category for the definition of future outlook (DFO). The combinations of the three components (i.e., OHI, OEC, and DFO) lead to an overall grade as "bad" for the trophic status in the Changjiang River estuary.
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| 关 键 词： | 营养状态 河口 长江 模型 |
| 收稿时间： | 4 November 2005 |
| 修稿时间： | 2006-03-142006-05-29 |
Assessment of trophic status in Changjiang (Yangtze) River estuary |
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| Wang?Baodong.Assessment of trophic status in Changjiang (Yangtze) River estuary[J].Chinese Journal of Oceanology and Limnology,2007,25(3):261-269. |
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| Authors: | Wang Baodong |
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| Institution: | 1.The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;2.The Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China |
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| Abstract: | The integrated methodology for the assessment of estuarine trophic status (ASSETS), which was extended and refined from the United States National Estuarine Eutrophication Assessment (NEEA), is a multi-parameter assessment system and has been widely used in eutrophication assessment in estuarine and coastal waters. The ASSETS was applied to evaluate the trophic status of the Changjiang (Yangtze) River estuary, one of the largest estuaries in the world. The following main results were obtained: (i) The estuarine export potential is "moderate susceptibility" due to the "moderate" dilution potential and "moderate" flushing potential; (ii) The overall human influence (OHI) index classified the impact of nutrients in the system as "high" due to the high level of nutrient discharge by the river which channels anthropogenic impacts in the catchments to the estuarine system; (iii) The overall eutrophic condition (OEC) in the estuary was classified into the "high" category due to frequent occurrence of nuisance and toxic algal blooms in the mixing and seawater zones; (iv) Since the nutrient loadings (e.g., DIN) in the river is expected to continue to increase in the near future following the population increase and rapid economic growth throughout the drainage basin, the nutrient-related symptoms in the estuary are likely to substantially worsen, which leads to the "worsen high" category for the definition of future outlook (DFO). The combinations of the three components (i.e., OHI, OEC, and DFO) lead to an overall grade as "bad" for the trophic status in the Changjiang River estuary. |
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| Keywords: | eutrophication model estuary Changjiang (Yangtze) River ASSETS index |
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