基于遥感数据的青海湖流域生物多样性评价研究

摘要

青海湖地区是我国青藏高原生物多样性最为丰富的地区之一.利用遥感技术手段配合地面调查,建立适合青海湖流域的生物多样性评价指标体系,并对流域的生物多样性进行评价.结果显示,流域内生物多样性最为丰富的区域主要分布在湖区的北部.这些区域共同特点是植被覆盖度高,年降水量较多,河流分布密集,再加上人口密度低,载畜量低,没有道路和旅游的影响,这些区域为动植物营造了一个良好的生存环境和发展空间.青海湖周边地区、沙岛、青海湖北岸、鸟岛、倒淌河湿地等区域生物多样性较低,亟需加强保护.%Qinghai-Lake Area is one of the most abundant areas of biological diversity in Qinghai-Tibetan Plateau.Therefore,we use remote sensing technology and ground investigation to build indicator system for biodiversity assessment,fit for Qinghai-Lake Area,and carries out assessment The result shows,the most abundant areas of biological diversity of this basin distribute north of the Qinghai-Lake Those areas have the same characteristics of high vegetation coverage,high annual precipitations,concentrated river distribution,low density of population,low stick capacity,and low influence of road and tourism These areas build good living environment and developing space for plants and animals But districts of surrounding areas of Qinghai-Lake,Sand Island,North bank of Qinghai-Lake,Bird Island and Daotang-River Wetland,with low biological diversity,are badly in need of strengthen protection