青藏高原那曲地区冬虫夏草资源分布空间分析方法

冬虫夏草(Cordyceps sinensis)是分布在我国青藏高原的可再生资源,具有极其名贵的中药材价值,而目前我国冬虫夏草资源的分布区域尚不清楚。以西藏那曲地区为例,根据冬虫夏草资源分布的生境条件,结合冬虫夏草的生态特性指标,利用地理信息系统(GIS)空间分析方法对冬虫夏草的空间分布区域进行了分析。结果表明,那曲地区冬虫夏草资源主要分布于那曲的东部,分布面积约为4.93万km2,占地区总面积的12.54%。与实地调查结果比较,提出的基于GIS空间分析的冬虫夏草分布区分析方法精度较高,说明空间分析方法在冬虫夏草资源调查评价上具有一定的可行性,为今后的冬虫夏草资源调查等相关研究提供方法支持。

The spatial distribution of Cordyceps sinensis in Nakchu Prefecture of Tibetan Plateau

Cordyceps sinensis is a unique resource as traditional Chinese medicine with precious value in Tibetan Plateau of China.However,spatial distribution of the resource was still unknown very clearly.This paper intended to map the distribution of Cordyceps sinensis resource in Nakchu region in Tibet,using an approach of GIS spatial analysis.The characteristics of Cordyceps sinensis were considered with habitat conditions for the mapping.Our mapping result showed that Cordyceps sinensis in Nakchu was mainly distributed in Eastern Regions,with an area of 49300 km~2,accounting for 12.54% of the total.Verification with field investigation confirmed the accuracy of the mapping approach.This indicated the feasibility of applying GIS technology in monitoring the spatial dynamics of Cordyceps sinensis resource in future.