朝鲜淫羊藿于中国东三省的潜在分布预测

Predicting the potential distribution of Epimedium koreanum Nakai in Northeast China

了解物种分布格局及其主要影响因子是进行科学合理保护和利用野生资源的重要基础和前提。朝鲜淫羊藿(Epimedium koreanum Nakai)作为东北地区重要的药用植物资源,对其潜在分布格局进行预测,探讨决定其分布格局的主要环境因子,可为其种群保护和开发利用提供科学依据。本文基于朝鲜淫羊藿的15个地理分布点数据和19个气候以及6个土壤指标,利用最大熵(Max Ent)模型,对朝鲜淫羊藿在东北三省的潜在分布区和适宜等级进行预测。结果表明:朝鲜淫羊藿的潜在分布区主要位于辽宁省东部和吉林省南部,面积达170270 km2;核心适生区位于辽宁省东部以及吉林省南部的温带落叶阔叶林区域,面积达80102 km2。最干月降水量和表层土壤有机碳含量分别是影响朝鲜淫羊藿分布的主要气候和土壤因子。本研究可为朝鲜淫羊藿药用植物资源的生境保护与人工栽培用地的合理布局提供科学依据。

Understanding species distribution and its main influencing factors is important basis for the rational conservation and utilization of wild resources. Epimedium koreanum Nakai is an important medicinal plant resource in Northeast China. Predicting the potential distribution of E.koreanum and clarifying the driving factors can provide scientific basis for the conservation and exploitation of this species. In this study,we predicted the potential distribution and suitability grades of E. koreanum in Northeast China based on 15 occurrence records,19 climatic factors and six soil factors using the Maximum Entropy（ Max Ent） model. We found that the potential distribution of E. koreanum were mainly located in eastern Liaoning and southern Jilin with an area of 170270 km^2. The core suitable habitats of E. koreanum were located in the temperate deciduous broad-leaved forests of eastern Liaoning and southern Jilin,with an area of 80102 km^2. The precipitation of the driest month and organic carbon content in topsoil were the major climatic and soil factors influencing its potential distribution,respectively. Our results will provide scientific basis for the habitat conservation and artificial cultivation of E. koreanum.