课题组以漳江口自然保护区红树林生态系统为研究对象，该区域位于中国东南沿海的亚热带湿地生态系统。为更好地实施生态风险评估与环境管理，本研究对29个站位表层沉积物的痕量金属浓度、来源和污染进行了分析。沉积物中金属的含量分布为Cu>Cr>Zn>Cr>Pb>Hg，聚类分析和主成分分析表明，该区域的痕量金属主要来自于人为活动影响。污染负荷指数和累积指数法的计算结果表明，沉积物中除Pb，Cr和As，其余元素处于未污染状态。。相关文章《Environmental and Ecological Risk Assessment of Trace Metal Contamination in Mangrove Ecosystems: A Case from Zhangjiangkou Mangrove National Nature Reserve》于2016年8月被《BioMed Research International》接收。

Abstract:

Zhangjiangkou Mangrove National Nature Reserve is a subtropical wetland ecosystem in southeast coast of China, which is of dense population and rapid development. The concentrations, sources, and pollution assessment of trace metals (Cu, Cd, Pb, Cr, Zn, As, and Hg) in surface sediment from 29 sites and the biota specimen were investigated for better ecological risk assessment and environmental management. The ranges of trace metals in mg/kg sediment were as follows: Cu (10.79–26.66), Cd (0.03–0.19), Pb (36.71–59.86), Cr (9.67–134.51), Zn (119.69–157.84), As (15.65–31.60), and Hg (0.00–0.08). The sequences of the bioaccumulation of studied metals are Zn > Cu > As > Cr > Pb > Cd > Hg with few exceptions. Cluster analysis and principal component analysis revealed that the trace metals in the studied area mainly derived from anthropogenic activities, such as industrial effluents, agricultural waste, and domestic sewage. Pollution load index and geoaccumulation index were calculated for trace metals in surface sediments, which indicated unpolluted status in general except Pb, Cr, and As.