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学科主题: Ecology; Limnology
题名: Budgets and dynamics of nitrogen and phosphorus in a shallow, hypereutrophic lake in China
作者: Huijuan Tang ; Ping Xie
通讯作者: Xie, P, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol China, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China
关键词: FRESH-WATER
刊名: JOURNAL OF FRESHWATER ECOLOGY
发表日期: 2000
卷: 15, 期:4, 页:505-514
收录类别: SCI
部门归属: Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol China, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China
摘要: Budgets and dynamics of nitrogen and phosphorus in Lake Donghu were investigated from Oct. 1997 to Sept. 1999. The water residence time was estimated to be 89 days in 1997-1998 and 124 days in 1998-1999. The total external loadings were 53 g N m(-2) yr(-1) and 3.2 g P m(-2) yr(-1) in 1997-1998, and 42 g N m(-2) yr(-1) and 3.1 g P m(-2) yr(-1) in 1998-1999. On average, about 80% of nitrogen and phosphorus input was from sewage outlets, while the rest was from land runoff and precipitation. Ammonium ion was the most abundant form of inorganic nitrogen in the sewage. The nutrient output was mainly through water outflow and fish catch. The percentages of nutrients in fish were estimated to be 7.8%-11.2% for nitrogen and 47.6%- 49.6% for phosphorus. Lake Donghu has a very high nutrient retention (63% for nitrogen and 79% for phosphorus) mainly due to its closure and long water residence time. Sedimentation is an important nutrient retention mechanism in this lake. Using mass balance method, we estimated that denitrification of Lake Donghu involves about 50% of the retained nitrogen. Lake Donghu is rich in inorganic nitrogen and phosphorus and showed great seasonal variation.
WOS记录号: WOS:000165431900010
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/152342/10062
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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Huijuan Tang; Ping Xie.Budgets and dynamics of nitrogen and phosphorus in a shallow, hypereutrophic lake in China,JOURNAL OF FRESHWATER ECOLOGY,2000,15(4):505-514
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