| Budgets and dynamics of nitrogen and phosphorus in a shallow, hypereutrophic lake in China | |
| Huijuan Tang; Ping Xie; Xie, P, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol China, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China | |
| 2000 | |
| Source Publication | JOURNAL OF FRESHWATER ECOLOGY
 |
| Volume | 15Issue:4Pages:505-514 |
| Abstract | 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. |
| Keyword | Fresh-water |
| Department | Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol China, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China |
| Subject Area | Ecology ; Limnology |
| Indexed By | SCI |
| WOS ID | WOS:000165431900010 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ihb.ac.cn/handle/152342/10062 |
| Collection | 期刊论文 |
| Corresponding Author | Xie, P, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol China, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China |
| Recommended Citation GB/T 7714 | Huijuan Tang,Ping Xie,Xie, P, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol China, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China. Budgets and dynamics of nitrogen and phosphorus in a shallow, hypereutrophic lake in China[J]. JOURNAL OF FRESHWATER ECOLOGY,2000,15(4):505-514. |
| APA | Huijuan Tang,Ping Xie,&Xie, P, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol China, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China.(2000).Budgets and dynamics of nitrogen and phosphorus in a shallow, hypereutrophic lake in China.JOURNAL OF FRESHWATER ECOLOGY,15(4),505-514. |
| MLA | Huijuan Tang,et al."Budgets and dynamics of nitrogen and phosphorus in a shallow, hypereutrophic lake in China".JOURNAL OF FRESHWATER ECOLOGY 15.4(2000):505-514. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Budgets and dynamics（703KB） | 开放获取 | -- | View Application Full Text | |||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment