Distribution Characteristics of Phosphorus in the Sediments and Overlying Water of Poyang Lake
文献类型：SCI/SSCI论文
| 作者 | Wang L. Q.; Liang, T. |
| 发表日期 | 2015 |
| 关键词 | submerged macrophytes nitrogen dynamics yangtze-river eutrophication china forms shallow taihu phytoplankton fractionation |
| 英文摘要 | Phosphorus (P) is a key indicator of the aquatic organism growth and eutrophication in lakes. The distribution and speciation of P and its release characteristics from sediments were investigated by analyzing sediment and water samples collected during high flow and low flow periods. Results showed that the average concentrations (ranges) of total phosphorus (TP) in the surface and deep water were 0.06 mg L-1 (0.03-0.13 mg L-1) and 0.15 mg L-1 (0.06-0.33 mg L-1), respectively, while the average concentration (range) of TP in sediments was 709.17 mg kg(-1) (544.76-932.11 mg kg(-1)). The concentrations of TP and different forms of P varied spatially in the surface sediments, displaying a decreasing trend from south to north. P also varied topographically from estuarine areas to lake areas. The vertical distribution of TP and different forms of P were observed to decrease as depth increased. The P concentrations during the low flow period were higher than those during the high flow period. Inorganic phosphorus (IP) was the dominant form of P, accounting for 61%-82% of TP. The concentration of bioavailable phosphorus in sediments was relatively large, indicating a high risk of release to overlying water. The simulation experiment of P release from sediments showed that the release was relatively fast in the first 0-5 min and then decreased to a plateau after 1 hr. Approximately 84-89% of the maximum amount of P was released during the first hour. |
| 出处 | Plos One |
| 卷 | 10 |
| 期 | 5 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1932-6203 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/38902]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Wang L. Q.,Liang, T.. Distribution Characteristics of Phosphorus in the Sediments and Overlying Water of Poyang Lake. 2015. |
入库方式： OAI收割
来源：地理科学与资源研究所
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