TN : TP ratio and planktivorous fish do not affect nutrient-chlorophyll relationships in shallow lakes
文献类型：期刊论文
| 作者 | Wang, Hai-Jun1; Liang, Xiao-Min1; Jiang, Ping-Hong1,2; Wang, Jian1; Wu, Shi-Kai1,2; Wang, Hong-Zhu1 |
| 刊名 | FRESHWATER BIOLOGY
 |
| 出版日期 | 2008-05-01 |
| 卷号 | 53期号:5页码:935-944 |
| 关键词 | chlorophyll-a phytoplankton planktivorous fish total nitrogen : total phosphorus ratio total phosphorus |
| ISSN号 | 0046-5070 |
| 通讯作者 | Wang, HZ, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China |
| 中文摘要 | 1. In previous work, phytoplankton regulation in freshwater lakes has been associated with many factors. Among these, the ratio of total nitrogen to total phosphorus (TN : TP) has been widely proposed as an index to identify whether phytoplankton are N- or P-limited. From another point of view, it has been suggested that planktivorous fish can be used to control phytoplankton. 2. Large-scale investigations of phytoplankton biomass [measured as chlorophyll a, (chl-a)] were carried out in 45 mid-lower Yangtze shallow lakes to test hypotheses concerning nutrient limitation (assessed with TN : TP ratios) and phytoplankton control by planktivorous fish. 3. Regression analyses indicated that TP was the primary regulating factor and TN the second regulating factor for both annual and summer phytoplankton chl-a. In separate nutrient-chl-a regression analyses for lakes of different TN : TP ratios, TP was also superior to TN in predicting chl-a at all particular TN : TP ranges and over the entire TN : TP spectrum. Further analyses found that chl-a : TP was not influenced by TN : TP, while chl-a : TN was positively and highly correlated to TP : TN. 4. Based on these results, and others in the literature, we argue that the TN : TP ratio is inappropriate as an index to identify limiting nutrients. It is almost impossible to specify a 'cut-off' TN : TP ratio to identify a limiting nutrient for a multi-species community because optimal N : P ratios vary greatly among phytoplankton species. 5. Lakes with yields of planktivorous fish (silver and bighead carp, the species native to China) > 100 kg ha(-1) had significantly higher chl-a and lower Secchi depth than those with yields < 100 kg ha(-1). TP-chl-a and TP-Secchi depth relationships are not significantly different between lakes with yields > 100 kg ha(-1) or < 100 kg ha(-1). These results indicate that the fish failed to decrease chl-a yield or enhance Z(SD). Therefore, silver carp and bighead carp are not recommended as a biotic agent for phytoplankton control in lake management if the goal is to control the entire phytoplankton and to enhance water quality. |
| 英文摘要 | 1. In previous work, phytoplankton regulation in freshwater lakes has been associated with many factors. Among these, the ratio of total nitrogen to total phosphorus (TN : TP) has been widely proposed as an index to identify whether phytoplankton are N- or P-limited. From another point of view, it has been suggested that planktivorous fish can be used to control phytoplankton. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 学科主题 | Marine & Freshwater Biology |
| 类目[WOS] | Marine & Freshwater Biology |
| 研究领域[WOS] | Marine & Freshwater Biology |
| 关键词[WOS] | SILVER CARP ; HYPOPHTHALMICHTHYS-MOLITRIX ; PLANKTON COMMUNITY ; ALGAL BIOMASS ; BIGHEAD CARP ; PHOSPHORUS ; PREDICTION ; NITROGEN ; EUTROPHICATION ; PHYTOPLANKTON |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000254808400008 |
| 公开日期 | 2010-10-13 |
| 源URL | [http://ir.ihb.ac.cn/handle/152342/8184]  |
| 专题 | 水生生物研究所_中科院水生所知识产出（2009年前）_期刊论文 |
| 作者单位 | 1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Hai-Jun,Liang, Xiao-Min,Jiang, Ping-Hong,et al. TN : TP ratio and planktivorous fish do not affect nutrient-chlorophyll relationships in shallow lakes[J]. FRESHWATER BIOLOGY,2008,53(5):935-944. |
| APA | Wang, Hai-Jun,Liang, Xiao-Min,Jiang, Ping-Hong,Wang, Jian,Wu, Shi-Kai,&Wang, Hong-Zhu.(2008).TN : TP ratio and planktivorous fish do not affect nutrient-chlorophyll relationships in shallow lakes.FRESHWATER BIOLOGY,53(5),935-944. |
| MLA | Wang, Hai-Jun,et al."TN : TP ratio and planktivorous fish do not affect nutrient-chlorophyll relationships in shallow lakes".FRESHWATER BIOLOGY 53.5(2008):935-944. |
入库方式： OAI收割
来源：水生生物研究所
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