文章摘要
方淑波,叶属峰,贾晓波,田 壮,聂 耳,郑 正.盐城海岸带表层土壤重金属潜在生态风险分析[J].上海海洋大学学报,2012,21(1):86-91
盐城海岸带表层土壤重金属潜在生态风险分析
Analysis of spatial heterogeneity of the ecological risks associated with heavy metals along Yancheng Coast
  
DOI:
中文关键词: Hakanson指数  重金属  空间格局  潜在生态风险  管理策略
英文关键词: Hakanson index  heavy metals  spatial patterns  potential ecological risks  management strategy
基金项目:国家自然科学基金(41101172);国家水专项资金(2009ZX07106-04)
作者单位
方淑波 上海海洋大学 水产与生命学院 
叶属峰 上海海洋大学 水产与生命学院 
贾晓波 中国环境科学研究院 流域水生态保护技术研究室 
田 壮 上海海洋大学 水产与生命学院 
聂 耳 复旦大学 环境科学与工程系 
郑 正 复旦大学 环境科学与工程系 
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中文摘要:
      以2007年9-10月间采集的106个表层土壤样品为基础,分析了Cr、Cu、Ni、Zn、Cd等5种重金属元素的含量,计算了盐城海岸带重金属的Hakanson生态风险指数,研究了盐城海岸带的重金属生态风险格局。采用GS+软件,对生态风险指数进行了空间插值。结果表明:盐城海岸带的重金属生态风险呈现出明显的南北分异及海陆分异,北部开发较久的区域、内陆区域的生态风险值较高。对比农田与水产养殖区域与整个区域的平均生态风险值,农田区域的生态风险值接近整体的生态风险值,而水产养殖区域的生态风险值低于整体的生态风险值。就人为活动引入的重金属生态风险管理而言,盐城海岸带的重金属生态风险管理集中于人类活动较强和较弱的两个区域,〖JP2〗前者如北部射阳港、射阳电厂、大丰港等,后者如射阳丹顶鹤自然保护区、大丰麋鹿自然保护区以及南部辐射沙洲区域等,这些区域多数是生态价值较高的热点区域
英文摘要:
      Using the Hakanson Risk Index, the spatial patterns of potential heavy metal (HM) ecological risks were studied. 106 soil and sediment samples were collected from September to October,2007 along the Yellow Sea Coast, and analyzed for the concentrations of heavy metals including metals of Cr, Cu, Ni, Zn, and Cd. By software of GS+, the RI indices were interpolated. Data analysis revealed a dichotomy of HM levels and the associated potential for ecological risk, with northern areas having higher HM concentrations and greater risk indices while southern areas having lower levels of HM and RIs. RIs were also higher in inland areas than near the coastal areas. Our data revealed that the average HM concentrations in agricultural areas were higher than the average value of all samples. In contrast, the average HM concentrations from aquaculture areas were lower than the overall average. These data suggest the need for two overall target areas for ongoing risk investigations, one centered on controlling HM sources and offsite transport at highly disturbed locations, such as Sheyang Harbor, Sheyang Power Plant, Dafeng Habor, which are located in the north, and a second focused on the less disturbed southern areas, particularly nature reserves where maintenance of biological diversity and eco integrity is paramount, including the Sheyang Red Crown Crane Natural Reserved Areas, the Dafeng Moose Natural Reserved Lands, and the southern radiation sand areas.
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