【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)
【機構】 中國水產科學研究院南海水產研究所;
【摘要】 根據2009年9月廣西北部灣近岸的海洋生態調查資料,利用地理信息系統的空間分析功能,從海水水質、營養水平、生物量和初級生產力水平、生物多樣性和生態系統緩沖容量5個方面分析了秋季廣西北部灣近岸海域環境現狀,并進一步利用生態風險綜合指數對廣西北部灣海洋生態風險進行了評價.結果表明:2009年秋季,廣西北部灣近岸海域生態環境質量較好,大部分生態系統風險指標等級均處于"中低"或"較低"水平,整體處于低風險狀態.生態風險綜合指數結果顯示,廣西北部灣海域生態風險分布具有明顯的空間異質性,離岸水域生態系統的風險綜合指數較低,越靠近港灣內,風險狀態等級越高.
【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.
【Key words】 ecological risk assessment; ecological risk comprehensive index; GIS; Beibu Gulf; Guangxi coast.;
【基金】 環境保護部北部灣經濟區沿海重點產業發展戰略環境影響評價項目(20090413);廣東省自然科學基金博士科研啟動項目(9451030002002475);中央級公益性科研院所基本科研業務費專項資金(2010ZD01)資助
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