七星湖湿地磷素分布特征及扩散通量估算

钟馨; 田永兰; 钟美芳; 张化永

doi:10.3969/j.issn.1674-991X.2017.02.023

七星湖湿地磷素分布特征及扩散通量估算

doi: 10.3969/j.issn.1674-991X.2017.02.023

华北电力大学工程生态学与非线性科学研究中心,北京 102206

详细信息

作者简介:
钟馨(1992—),女,硕士研究生,研究方向为水污染控制与生态修复, zhongxin0531@126.com

通讯作者:
张化永 E-mail: rceens@ncepu.edu.cn

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出版历程
- 收稿日期: 2016-09-09
- 刊出日期: 2017-03-20

Distribution of phosphorus and estimation of diffusion flux in the Qixinghu wetland

Research Center for Engineering Ecology and Nonlinear Science, North China Electric Power University, Beijing 102206, China

More Information

Corresponding author: Huayong ZHANG E-mail: rceens@ncepu.edu.cn

摘要

摘要: 为研究山东省滕州市七星湖湿地磷素的分布特征及其迁移规律,植被在磷的迁移转化中的作用,采集秋季七星湖表层沉积物及其上覆水体样品,分析总磷(TP)、总溶解性磷(TDP)、溶解性活性反应磷(SRP)、颗粒态磷(PP)的分布特征和相关性,计算沉积物-上覆水体界面的扩散通量。结果表明:TP浓度在上覆水体明水区域沿途总体变化不大(0.05~0.06 mg/L),在芦苇群落沿程降低(0.04~0.09 mg/L),香蒲群落中有波动变化(0.02~0.09 mg/L)。上、中、下游3个断面明水区域沉积物间隙水中各形态磷素浓度均比植物区域高,说明植物对沉积物中磷素的截留吸收转化有重要作用。上、中、下游大型挺水植物各器官磷素所占比例有明显差异,且地上部分高于地下部分。七星湖湿地经过3年的磷素沉降,沉积物TP浓度增加42.2%。沉积物-上覆水体间TDP和SRP的扩散通量均为正通量,表明磷素从沉积物向上覆水体扩散,且明水区域扩散通量均高于植物区域。表层沉积物间隙水和上覆水体各形态磷的相关性表明,间隙水中的磷主要以TDP和SRP的形态向上覆水体扩散。
- 间隙水 /
- 湿地 /
- 水生植物 /
- 磷形态 /
- 扩散通量
Abstract: To study the distribution and migration of phosphorus in the Qixinghu wetland in Tengzhou City of Shangdong Province, the samples of overlying water and sediment of Qixinghu wetland were collected, the distribution characteristics of total phosphorus(TP), total dissolved phosphorus(TDP), solubility reactive phosphorus(SRP) and particulate phosphorus(PP) analyzed, and the relationship of P in overlying water and pore water of sediment studied. The results showed that, TP concentrations in overlying water of open water area were stable along with the flow direction (0.05-0.06 mg/L), declined in overlying water of reed community area (0.04-0.09 mg/L) and fluctuated in overlying water of cattail community area (0.02-0.09 mg/L). All measured phosphorus fractionations (TP, TDP, SRP and PP) in pore water of sediment of open water area were higher than those of plant communities, indicating that plants played an important role in the absorption and transformation of phosphorus in sediments. Phosphorus contents in aerial organs of macrophytes were significantly higher than the underground part. After settlement of phosphorus in three years, the content of TP in sediments increased by 42.2% in the wetland. The diffusion flux across sediment-water interface of TDP and SRP were positive, suggesting that phosphorus diffuses from sediment to overlying water. Moreover, diffusion fluxes of open water were higher than those of the plant communities. As indicated by the various forms of phosphorus correlation of pore water and overlying water, the phosphorus of pore water mainly diffuses into the overlying water by TDP and SRP.
- pore water of sediment /
- wetland /
- macrophytes /
- phosphorus fractionations /
- diffusion flux

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