县域尺度生物多样遥感监测与评价研究

针对国内缺少系统性生物多样性遥感评价技术方法与案例的现状,结合国家重点生态功能区县域生物多样性评价工作要求,基于遥感技术优势与特点,建立了县域尺度生物多样性遥感监测与评价方法,并开展实例应用,动态监测了研究区生物多样性时空变化情况。监测结果显示:研究区生物多样性在2000~2010年以降低区域为主,其面积占研究区总面积的77.24%,而提高区域只占22.58%。通过实例分析表明:所建立的方法能够监测县域尺度的生物多样性现状及其时空变化情况,能在"面"尺度上获取生物多样性空间信息,相对于生态调查的传统方法,具有时效性强、操作简便、效率高等优势,可以应用于县域尺度生物多样性监测与评价。

Biodiversity Monitoring and Assessment Using Remote Sensing Technology at County’s Scale

With regard to the lack of systemic evaluation of biodiversity in China,combining with the requirements of Biodiversity Assessment at county’s in the National Key Ecological Function Areas,based on the remote sensing technology advantages and characteristics,the paper proposed a monitoring and evaluation method for biodiversity at county’s scale using remote sensing.which can carry it out in a county and monitored the temporal and spatial biodiversity changes in the study area.The results showed that the decreased biodiversity zone mainly occupied the study area from 2000 to 2010,whose area accounted for 77.24% of the study area while the increased zone only accounted for 22.58%.The application showed that the method can monitor the current status and the temporal and spatial changes of biodiversity at county’s scale,which also can obtain spatial information of biodiversity at the pixel scale,as a result,managers can quantitatively analyze the biodiversity.Compared with the traditional method of field investigation,the proposed method has the advantages of fine timeliness,easy operation and high efficiency.Therefore,it is feasible to be used in monitoring and assessment of biodiversity at county’s scale.