柠檬桉在中国的适生地理分布及其影响因子  

The suitable geographic range for Corymbia citriodora in China and the influencing factors

作　　者：欧阳林男 陈少雄[1] 张维耀[1] 何沙娥 刘学锋[1] OUYANG Lin-nan;CHEN Shao-xiong;ZHANG Wei-yao;HE Sha-e;LIU Xue-feng(China Eucalypt Research Centre,State Forestry Administration,Zhanfiang 524022,Guangdong,China)

机构地区：[1]国家林业局桉树研究开发中心,广东湛江524022

出　　处：《生态学杂志》2019年第2期361-367,共7页Chinese Journal of Ecology

基　　金："十三五"国家重点研发计划课题(2016YFD0600502);广东省林业科技创新项目(2016KJCX005)资助

摘　　要：基于气候、土壤、地形因子数据,结合柠檬桉现有分布数据,使用最大熵模型(MaxEnt)对柠檬桉在中国的适生地理区域进行预测。结果表明:模型的模拟精度高(AUC值>0.91),当前最适生区(存在概率>0.66)主要集中在东南沿海地带;刀切法检验结果显示,最湿季度平均温度、海拔、温度变化方差、年均温、最干季度平均温度、年温变化范围、最暖季度降水量是影响柠檬桉分布的主要生态因子,累积贡献率达86.9%;中国最适生区的最湿季度平均温度、年均温、最干季度平均温度、年温变化范围与原产地自然分布区相应因子相似性强,与原产地自然分布区相比,中国适生区的海拔更低,最暖季度降水量更高,有利于柠檬桉的快速生长。该结果可为柠檬桉在中国的推广种植提供依据。We developed a MaxEnt model for predicting potentially suitable geographic areas for Corymbia citriodora with climate,soil and topographic data from the landscapes and data from successful plantation locations in China. The model had high precision( AUC value >0.91). The majority of the highly suitable areas( existence probability >0.66) identified for C. citriodora are concentrated in coastal regions of southeastern China. According to the results of the jackknife test,the dominant ecological factors affecting the potential distribution of C. citriodora were the mean temperature of the wettest quarter,altitude,seasonal temperature variance,mean annual temperature,mean temperature of the driest quarter,annual temperature range,and precipitation of the warmest quarter. These factors together accounted for 86.9% of variation in suitable areas.The mean temperature of wettest quarter,mean annual temperature,mean temperature of the driest quarter and the annual temperature range for areas identified as being highly suited to C. citriodora in China,were similar to the values of the corresponding factors in its natural distribution in Australia. Compared with the species’ natural distribution,suitable areas in China were characterized by lower altitudes and higher precipitations in the warmest quarter,which are favorable to rapid growth of C. citriodora. Our results provide a reference for sustainable development of C.citriodora plantations in China.

关 键 词：物种分布 最大熵模型 气候适宜性 适地适树 

分 类 号：Q948[生物学—植物学]