基于熵权法模糊物元模型的独一味(Lamiophlomis rotata)适宜性分布

Potential Suitable Regions of Lamiophlomis rotata Determined with the Entropy Method-fuzzy Matter Element Model

独一味(Lamiophlomi s rotata)是唇形科濒危药用植物。根据模糊物元模型理论构建独一味产量与14个生态因子之间的模糊隶属函数,采用熵权法确定评价指标权重,利用ArcGIS平台确定青藏高原地区独一味生态适宜性空间分布,旨在探究独一味适宜性分布状况,为濒危藏药独一味资源的动态监测及资源开发利用提供科学依据。结果表明:独一味最佳生态相似区域占研究区面积的3.13%、高度相似区域占6.34%、中度相似区域面积占8.53%、低度相似区域占6.35%、不相似区域占75.65%。独一味主要集中在青藏高原东部边缘四川、甘肃和青海高海拔地带的次生植被及逐渐退化的高山草甸区,基于GIS的模糊物元模型可评价独一味的生态适宜区域和空间分布状态,为其GAP选址和生境保护地带提供有价值的信息。

Lamiophlomis rotataa is an endangered plateau medicinal herb.Based on fuzzy matter-element model,fuzzy membership functions of the relationships between the plant yield and14 ecological factors were designed.On the basis of these data,the optimum suitability conditions for the plant were calculated and the relative importance of each environmental factor were determined by the entropy method model,resulting in the most limiting suitability assessment criteria.Finally,the probably adaptive regions for the plant were estimated based on GIS spatial analysis of habitat conditions in Tibet areas in order to explore the adaptive distribution and provide a scientific basis for monitoring and utilization of the plant resources.The results showed that there was 3.13% of the studied area classified as the best suitable region for L.rotata,6.34% of which as the highly suitable region,8.53% as the middle suitable region,6.35% as the low suitable,and75.65% of which as the unsuitable region.The best and the highly suitable regions were mainly located in Sichuan,Gansu,and Qinghai on the Eastern edge of the Qinghai-Tibet Plateau areas,where were rich in secondary vegetations and degraded alpine meadows.The assessment model based on GIS could accurately evaluate the ecological suitability and the spatial distribution for the plant,which is of value to address the choice of good agricultural practice(GAP)and provide insight for choosing the most suitable cultivation sites as well as the habitat protection zones.