Long-term (1956-1999) dynamics of phosphorus in a shallow, subtropical Chinese lake with the possible effects of cyanobacterial blooms |
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| 出 版 社：Water Research |
| 发表时间：2002 |
| 台 站：
东湖湖泊生态系统试验站
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| 作 者：Xie, L; Xie, P |
| 点 击 率：4535 |
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| 关 键 字：null |
| 摘 要：null |
| 关 键 字(英文)：phosphorus, water and sediment, long-term changes, cyanobacterial blooms, Lake Donghu |
| 摘 要(英文)：Abstract- This paper described the long-term changes of phosphorus concentrations in both the lake water and the sediment in a subtropical Chinese lake, Lake Donghu. The total phosphorus (TP) concentration in the lake water experienced an upward period from the 1950s, and peaked in 1983/1984, but declined obviously afterwards. From the 1950s to the1990s, TP content in the upper 10 cm sediment of the lake increased steadily from 0.307 to 1.68 mg P g DW-1 at Station I and from 0.151 to 0.89 mg P g DW-1 at Station II, respectively. The TP increase in the lake water before mid-1980s was mainly attributed to the massive input of sewage P. Outbreak of cyanobacterial blooms coincided with the peaks of TP and Orthophosphate (PO4-P) in the water in mid-1980s, and the maximum TP of the water reached as high as 1.349mg/l at Station I and 0.757mg/l at Station II (in1984), respectively. The TP and PO4-P declines in the water after mid-1980s was mainly attributed to the elimination of cyanobacterial bloom by fishes. |
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