广西北部湾近岸生态系统风险评价

【Author】 CHEN Zuo-zhi,CAI Wen-gui,XU Shan-nan,HUANG Zi-rong,QIU Yong-song(South China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Guangzhou 510300,China)

【机构】 中国水产科学研究院南海水产研究所；

【摘要】 根据2009年9月广西北部湾近岸的海洋生态调查资料,利用地理信息系统的空间分析功能,从海水水质、营养水平、生物量和初级生产力水平、生物多样性和生态系统缓冲容量5个方面分析了秋季广西北部湾近岸海域环境现状,并进一步利用生态风险综合指数对广西北部湾海洋生态风险进行了评价.结果表明:2009年秋季,广西北部湾近岸海域生态环境质量较好,大部分生态系统风险指标等级均处于"中低"或"较低"水平,整体处于低风险状态.生态风险综合指数结果显示,广西北部湾海域生态风险分布具有明显的空间异质性,离岸水域生态系统的风险综合指数较低,越靠近港湾内,风险状态等级越高.

【Abstract】 Based on the marine ecological investigation in the coastal area of Beibu Gulf,Guangxi in September 2009,a GIS-based evaluation was conducted on the present status of ecological environment quality,including seawater quality,nutrient level,biomass,primary productivity,biodiversity,and ecological buffer capacity,in the area in autumn,and the integrated ecological risk index(ERI) was adopted to assess the risk of the coastal ecosystem in the Gulf.In September 2009,the study area had a better ecological environment quality.Most of the risk indicators were at medium or lower level,and the total area was overall at low ecological risk level.The ERI showed that there was an obvious spatial heterogeneity in the distribution of the ecological risk.The nearer to the harbors,the higher the risk was.

【关键词】 生态风险评价； 生态风险综合指数； 地理信息系统； 北部湾； 广西近岸；

【Key words】 ecological risk assessment； ecological risk comprehensive index； GIS； Beibu Gulf； Guangxi coast.；

【基金】 环境保护部北部湾经济区沿海重点产业发展战略环境影响评价项目(20090413);广东省自然科学基金博士科研启动项目(9451030002002475);中央级公益性科研院所基本科研业务费专项资金(2010ZD01)资助