基于优化MaxEnt模型的黑木相思引种栽培区划  

Introduction and Cultivation Zoning of Acacia melanoxylon Based onOptimized MaxEnt Model

作　　者：张伟皓 叶利奇 陈启华 阮少宁[1] ZHANG Wei-hao;YE Li-qi;CHEN Qi-hua;RUAN Shao-ning(College of Forestry,Fujian Agriculture and Forestry University,Fuzhou 350002,Fujian,China)

机构地区：[1]福建农林大学林学院,福建福州350002

出　　处：《西北林学院学报》2023年第1期88-94,107,共8页Journal of Northwest Forestry University

基　　金：福建省林木种苗科技攻关项目(KLB19001B);福建农林大学科技创新专项(KFA17299A);福建省林业外来物种调查与研究(KHd2001A);福建农林大学林学高峰学科建设项目(72202200205)。

摘　　要：利用MaxEnt模型评估黑木相思在中国引种的潜在适生区,探讨影响其适生区分布的主要生态因子,并对适生区范围和类型进行划分,旨在为该树种在中国的引种区划提供依据。采用ENMeval数据包优化的MaxEnt模型,基于14个环境变量和159条黑木相思分布点,以我国95°-125°E、17°-38°N区域为模型投射空间范围,评估黑木相思的潜在适生地理分布;通过Spearman相关分析、方差膨胀因子(VIF)分析和刀切法检验,筛选出制约其潜在分布的主导环境因子。经ENMeval优化,当特征组合F C=Q HP,调控倍频R M=6时,A UC值为0.965,模型准确度极高。刀切法检验表明:最干月降雨量(40.1%)、月平均昼夜温差(26.9%)、年降水量(15.6%)、年均温(6.6%)、最冷月最低温(3.2%)和表层土壤酸碱度(2.8%)是影响黑木相思地理分布的重要生态因子,累计贡献率达95.2%。结果表明,黑木相思在中国适生区分为高(55.8354×10^(4) km^( 2))、中(152.9915×10^(4) km^( 2))、低(68.4567×10^(4) km^( 2))和非适生区(682.7165×10^(4) km^( 2)),其中高适生区为黑木相思引种栽培推广的重点地区,主要涵盖贵州、湖南、江西、福建、浙江东南部、台湾中部、云南西部和东部、广东北部和广西北部。该研究划分了黑木相思在中国适生分布范围,并分析了制约其分布的主要生态因子为水分和温度,为黑木相思在中国引种和推广提供科学依据。Acacia melanoxylon is a fast-growing and high-quality timber species native to Australia.It has high economic and ecological values.The MaxEnt model was used to assess the potential suitable areas for its introduction to China.The main ecological factors affecting the distribution of A.melanoxylon suitable areas were discussed.The range and types of suitable areas were also evaluated.The division intended to provide a basis for the introduction of this tree species.Using the MaxEnt model optimized by ENMeval data package,based on 14 environmental variables and 159 A.melanoxylon distribution points,with 95°-125°E and 17°-38°N as the model projection space range in China,the potential suitable geographic distribution of the plant was assessed.Through Spearman correlation analysis,variance inflation factor(VIF)analysis and knife-cutting test,the dominant environmental factors restricting its potential distribution were screened out.Optimized by ENMeval,when the feature combination F C=Q HP and the control frequency multiplier R M=6,the A UC value was 0.965,and the model accuracy was extremely high.The knife-cut method showed that the precipitation of driest month(40.1%),mean diurnal temperature range(26.9%),annual precipitation(15.6%),mean annual temperature(6.6%),min temperature of the coldest month(3.2%)and topsoil pH(2.8%)were important ecological factors to limit the geographic distribution of A.melanoxylon,with a cumulative contribution rate of 95.2%.The prediction results of MaxEnt divided the potential area for the introduction to China into three levels:highly-(55.8354×10^(4) km^( 2)),moderately-(152.9915×10^(4) km^( 2)),hardly-(68.4567×10^(4) km^( 2)),and non-suitable areas(682.7165×10^(4) km^( 2)).The highy suitable areas would be the key area for the cultivation and promotion of Acacia melanoxylon,mainly covering the administrative regions of Guizhou,Hunan,Jiangxi,Fujian,southeastern Zhejiang,central Taiwan,western and eastern Yunnan,northern Guangdong and northern Guangxi.It was recommended that

关 键 词：黑木相思 MAXENT 引种栽培 潜在适生区 ENMeval 生态因子 

分 类 号：S792.99[农业科学—林木遗传育种]