Distribution of Phosphorus and Nitrogen in the Sediments of the North Bay in Dianchi Lake
Distribution of Phosphorus and Nitrogen in the Sediments of the North Bay in Dianchi Lake
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DOI：
10.1089/ees.2015.0563
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发表时间：
2016-07
影响因子：
1.8
通讯作者：
Songdi;BaiXiaohua
中科院分区：
文献类型：
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作者：
Songdi;BaiXiaohua
摘要分析了滇池北湾4个沉积物柱样中磷和氮的形态特征。探讨了各形态磷、氮随沉积深度的变化情况及垂直分布特征。磷和氮在浅水区和河口沉积物中有大量积累。沉积物中磷的含量在一段时间内相对稳定，还原态可溶性磷的变化趋势表现出较高的垂直和空间变异性，这与沉积物的氧化还原状态有关。氮及其形态的垂直分布呈现复杂的变化趋势，各站点间的变化趋势没有明显的相似性。磷的平均浓度在整个剖面上随河口距离的增加而降低。结果表明，随着盘龙江河口时间的延长，水体中的磷、氮负荷逐渐加重。
Abstract Phosphorus and nitrogen fractions of four core sediment samples collected from the north bay of Dianchi Lake in China were analyzed. The condition of various forms of phosphorus and nitrogen varied with sediment depth among different sites, and characters of vertical distribution are discussed. Large amounts of phosphorus and nitrogen were accumulated in sediments of the shallow and estuary. The contents of phosphorus in the sediments were relatively stable over a period of time, and the variation trend of reductant soluble phosphorus showed high vertical and spatial variations, which were related to the redox state of sediments. Vertical distribution of nitrogen and fractions presented complex change tendency and there were no obvious similarities of the variation trend among all sites. Average concentrations of phosphorus decreased with the distance of the estuary in the whole profile. Results reflected that the phosphorus and nitrogen load was aggravated with time of estuary of Panlong River i...