四川汶川地震对生态系统破坏及其生态影响分析
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摘要
利用多平台、多分辨率遥感数据,监测了四川汶川地震灾前、灾后地表覆盖的变化,分析了地震对区域生态系统的破坏及生态重灾区各生态系统类型破坏的分布特征.采用地理信息系统建模、空间复合分析等手段,研究了地震对灾区生态承载力、生境与生物多样性、生态系统服务功能的影响.结果表明,地震对灾区生态系统造成严重破坏,灾区因地表破坏、水土流失加剧导致区域生态承载力下降,生境破碎化,生物多样性与生态系统服务功能受到影响.
The land surface vegetation variation before and after the earthquake in Wenchuan,Sichuan Province was monitored using multi-platform and multi-resolution Remote Sensing(RS) data.The ecological destroy intensity due to the earthquake and the distribution characteristics were analyzed.By constructing GIS models and spatial overlay analysis,the changes of ecological capacity of ecological disaster region,the impacts of habitats and biodiversity in the nature reserves,and the decline of ecosystem service of the assessment region caused by earthquake were studied.The results showed that the ecosystems were seriously destroyed in the earthquake disaster region.The main impacts included regional ecosystem capacity decline caused by destroy of land surface and intensification of soil and water loss,habitat fragmentation and biodiversity loss,and decline of ecosystem services.
The land surface vegetation variation before and after the earthquake in Wenchuan,Sichuan Province was monitored using multi-platform and multi-resolution Remote Sensing(RS) data.The ecological destroy intensity due to the earthquake and the distribution characteristics were analyzed.By constructing GIS models and spatial overlay analysis,the changes of ecological capacity of ecological disaster region,the impacts of habitats and biodiversity in the nature reserves,and the decline of ecosystem service of the assessment region caused by earthquake were studied.The results showed that the ecosystems were seriously destroyed in the earthquake disaster region.The main impacts included regional ecosystem capacity decline caused by destroy of land surface and intensification of soil and water loss,habitat fragmentation and biodiversity loss,and decline of ecosystem services.
引文
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[9]莫申国.GIS支持下的秦岭植被景观梯度分析[J].环境科学研究,2008,21(2):105-108.
[10]Wenger R B,Harris H J,Sivanpillai R,et al.A graph theoreticanalysis of relationships among ecosystem stressors[J].J EnvironManage,1999,57:109-122.
[11]杨克磊,张建芳,杨晓帆,等.唐山市南湖生态示范区景观生态风险评价[J].环境科学研究,2008,21(3):104-109.
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[13]Renner R.Ecological risk assessment struggles to define itself[J].Environ Sci Technol,1996,30:A172-A174.
[14]王学志,徐卫华,欧阳志云,等.生态位因子分析在大熊猫(Ailuropoda melanoleuca)生境评价中的应用[J].生态学报,28(2):821-828.
[15]肖,欧阳志云,赵景柱,等.岷山地区大熊猫(Ailuropodamelanoleuca)生境影响因子连通性及主导因子[J].生态学报,2008,28(1):267-273.
[16]张泽钧,胡锦矗,吴华.邛崃山系大熊猫和小熊猫生境选择的比较[J].兽类学报,2002,22(3):161-168.
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