甘肃省药用植物资源空间分布格局及其驱动因子

Spatial Distribution Pattern of Medicinal Plant Resources in Gansu Province and Driving Factors

目的:了解甘肃省药用植物资源种类空间分布特征,分析造成该空间分异的原因、变化趋势及影响的驱动因子,为甘肃省药用植物资源的合理开发和可持续发展提供科学依据。方法:运用全局空间自相关分析、趋势表面分析、局部空间自相关分析和热点分析等地统计分析技术,对第四次全国中药资源普查甘肃省87个县(区)药用植物资源种类丰富度及空间分布差异进行分析,并以植被类型、土壤质地、年平均气温、年平均降水量、海拔等为自然驱动因素,进一步分析本省药用植物资源空间分布格局与驱动因子的相关性。结果:甘肃省药用植物资源种类丰富度高或低的县(区)表现出集中分布的空间格局,其中种类丰富度高且集中分布在东南部,种类丰富度低的县(区)聚集分布在西北部;影响冷热点区域的主导驱动因子有植被类型、土壤质地类型构成比例、年均降雨量等。结论:甘肃省药用植物资源物种丰富度由西向东、由北向南呈递增趋势;自然驱动因子是影响药用植物资源多样性的重要因子,也是影响其空间分布格局的主导因子,其变化对药用植物资源的多样性及空间分布具有显著差异。

Objective:To clarify the spatial distribution characteristics of medicinal plant resources in Gansu province,analyze the causes,changing trends,and driving factors of the spatial differentiation,and thus lay a scientific basis for the rational development and sustainable development of medicinal plant resources in this province.Method:Based on the data of The Fourth National Survey of Chinese Medicine Resources,the richness and spatial distribution difference of medicinal plant resources in 87 counties(districts)of Gansu province were analyzed via the global spatial autocorrelation analysis,trend surface analysis,local spatial autocorrelation analysis,and hotspot analysis.Moreover,the correlation of vegetation type,soil texture,annual average temperature,annual average precipitation,and altitude with the spatial distribution pattern of the medicinal plant resources was discussed.Result:Counties(districts)with high or low richness of medicinal plant resources in Gansu province were respectively clustered together.To be specific,counties(districts)with high richness of the medicinal resources were mainly in southeastern Gansu,while those with low richness in northwestern Gansu.The leading driving factors affecting the cold and hot spots included vegetation type,soil texture,and average annual rainfall.Conclusion:The species richness of medicinal plant resources in Gansu province rises from west to east and from north to south.The natural driving factors are the key to the diversity and spatial distribution pattern of medicinal plant resources,which show significant influence on them.