基于生态位模型的连翘产地适宜性定量分析

Quantitative Analysis of Regional Suitability of Forsythia suspensa Based on Niche Model

连翘是一味名贵中药,具有很高的药用价值和经济价值。基于生态位模型和地理信息系统相关原理和方法,利用已知的69个连翘分布点位,结合24个与其生长和分布息息相关的环境因子,定量分析连翘在我国的潜在分布。结果表明,其核心分布区主要位于我国中部和东部地区,基本上分布于105°~125°E,30°~40°N之间,总面积为1 013 959 km^2;影响连翘分布的主导环境因子是:最冷季平均温度、最干月降雨量、最干季平均温度、气温季节性变动、年降雨量;最适宜连翘生长的生态位参数是:冬季最低温0℃左右,最干月降雨量在10 mm左右,最干季平均温度在0℃左右,气温季节性变动小于14℃,年降雨量755 mm左右。

Forsythia suspensa is a precious Chinese medicine, and it has a very high medicinal value and economic value. Based on t he niche theory and the related theory and methods of geographic information system, the paper uses 69 geographical distribution records of Forsythia suspense and 24 environmental map layers to quantitatively analyse potential distribution of Forsythia suspensa in China.The results showthat the core area is mainly in central and eastern areas in China（105°-125°E, 30°-40°N）, total area is 1 013 959 km^2.The dominant environmental factors affect distribution of Forsythia suspense, mean temperature of coldest quarter, precipitation of driest month, mean temperature of driest quarter, temperature seasonality, annual precipitation. The most suitable niche parameters for Forsythia suspense growth, the lowest temperature is about 0 ℃ in the winter, precipitation of driest month is about 10 mm, mean temperature of driest quarter is about 0 ℃, temperature seasonality is less than 14 ℃, annual precipitation is about 755 mm.