基于MaxEnt模型的四川省黄杉潜在适生区模拟及主导环境因子探究  

Simulation of potential suitable areas and exploration of dominant environmental factors of Pseudotsuga sinensis in Sichuan Province based on MaxEnt model

作　　者：李旭[1] 彭雪峰 彭培好[1] LI Xu;PENG Xuefeng;PENG Peihao(School of Geography and Planning,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]成都理工大学地理与规划学院,成都610059

出　　处：《四川林业科技》2024年第3期21-27,共7页Journal of Sichuan Forestry Science and Technology

摘　　要：基于四川省黄杉(Pseudotsuga sinensis)分布点数据以及气候(19个生物气候因子,时间跨度为1970~2020)和地形环境因子(海拔、坡度、坡向),通过MaxEnt模型来构建四川省黄杉潜在适生区的生态位模型,探究了影响其分布的主导环境因子,模拟了四川省黄杉植物的潜在分布区。研究结果表明;(1)模型总体的预测精度达到非常精确水平,AUC值达0.988;(2)影响其潜在分布的主要环境因子为海拔(DEM),主导因子的适生区海拔范围为1285~2678.2 m;(3)四川省黄杉高适生区主要位于1500~2500 m这一海拔区间;(4)四川省黄杉潜在适生区面积共2×10^(4)km^(2),其中高适生区面积0.381×10^(4)km^(2),中适生区面积1.346×10^(4)km^(2),低适生区面积0.273×10^(4)km^(2)。综合模型结果发现,适生区总体生境呈现破碎化,适生区主要分布于四川省的部分南部地区,以及部分东部地区,中低适生区分布于高适生区的周围,总适生区面积前三为,凉山州、达州市、攀枝花市,高适生区主要位于凉山州的中部县区,冕宁县、德昌县、普格县、会理县和会东县等,攀枝花的米易县等,达州市的东北部有零散分布的高适生区;四川省黄杉潜在适生区的驱动因子中海拔因子的影响大于温度和降水因子,明显大于坡度和坡向,海拔的适生区范围多为中海拔地区,具有较为宽广的生态适宜幅度和一定的耐旱特征。研究结果能有效初步且迅速了解黄杉在四川省的分布现状,对于野外保护工作的开展具有一定的指导意义。Based on the distribution data of Pseudotsuga sinensis in Sichuan Province,as well as climatic factors(19 biocrimatous factors,the time span is 1970-2020)and topographic and environmental factors(altitude,slope and aspect),the niche model of potential suitable area of P.sinensis in Sichuan Province was constructed by MaxEnt model,the dominant environmental factors affecting its distribution were explored,and the potential distribution area of P.sinensis in Sichuan Province was simulated.The results showed that:(1)The overall prediction accuracy of the model reached a very accurate level,and the AUC value reached 0.988.(2)The main environmental factor affecting its potential distribution was elevation(DEM),and the altitude range of the suitable area of the dominant factor was from 1285 m to 2678.2 m.(3)The high-suitable area of P.sinensis in Sichuan Province was mainly located in the altitude range from 1500 to 2500 m.(4)The potential suitable area of P.sinensis in Sichuan Province was 2×10^(4)km^(2),in which the high-suitable area was 0.381×10^(4)km^(2),the middle-suitable area was 1.346×10^(4)km^(2)and the low-suitable area was 0.273×10^(4)km^(2).According to the comprehensive model,the results showed that the overall habitat of the suitable area was fragmented,and the suitable area was mainly distributed in some southern areas and some eastern areas of Sichuan Province.The middle-and low-suitable areas were distributed around the high-suitable areas.The top three suitable areas were Liangshan Prefecture,Dazhou City and Panzhihua City,and the high-suitable areas were mainly located in the central counties of Liangshan Prefecture,in Mianning County,Dechang County,Puge County,Huili County and Huidong County,Miyi County of Panzhihua County.There were scattered high-suitable areas in the northeast of Dazhou City.Among the driving factors of the potential suitable areas of P.sinensis in Sichuan Province,the influence of altitude factors was greater than that of temperature and precipitation factors,and significan

关 键 词：黄杉 MaxEnt模型 环境因子 适生区 

分 类 号：S791.16[农业科学—林木遗传育种]