廣西北部灣近岸生態(tài)系統(tǒng)風(fēng)險評價

【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(jī)構(gòu)】 中國水產(chǎn)科學(xué)研究院南海水產(chǎn)研究所；

【摘要】 根據(jù)2009年9月廣西北部灣近岸的海洋生態(tài)調(diào)查資料,利用地理信息系統(tǒng)的空間分析功能,從海水水質(zhì)、營養(yǎng)水平、生物量和初級生產(chǎn)力水平、生物多樣性和生態(tài)系統(tǒng)緩沖容量5個方面分析了秋季廣西北部灣近岸海域環(huán)境現(xiàn)狀,并進(jìn)一步利用生態(tài)風(fēng)險綜合指數(shù)對廣西北部灣海洋生態(tài)風(fēng)險進(jìn)行了評價.結(jié)果表明:2009年秋季,廣西北部灣近岸海域生態(tài)環(huán)境質(zhì)量較好,大部分生態(tài)系統(tǒng)風(fēng)險指標(biāo)等級均處于"中低"或"較低"水平,整體處于低風(fēng)險狀態(tài).生態(tài)風(fēng)險綜合指數(shù)結(jié)果顯示,廣西北部灣海域生態(tài)風(fēng)險分布具有明顯的空間異質(zhì)性,離岸水域生態(tài)系統(tǒng)的風(fēng)險綜合指數(shù)較低,越靠近港灣內(nèi),風(fēng)險狀態(tài)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.

【關(guān)鍵詞】 生態(tài)風(fēng)險評價； 生態(tài)風(fēng)險綜合指數(shù)； 地理信息系統(tǒng)； 北部灣； 廣西近岸；

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

【基金】 環(huán)境保護(hù)部北部灣經(jīng)濟(jì)區(qū)沿海重點產(chǎn)業(yè)發(fā)展戰(zhàn)略環(huán)境影響評價項目(20090413);廣東省自然科學(xué)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(yè)務(wù)費(fèi)專項資金(2010ZD01)資助