林业科学2023，Vol.59Issue(12)：13-24,12.DOI:10.11707/j.1001-7488.LYKX20210823
基于MaxEnt模型的天然元宝枫在我国的适生区区划及合理性分析
Regionalization and Rationality Analysis of Natural Acer truncatum in China Based on MaxEnt Model
摘要
Abstract
[Objective]This paper probes into the suitable area zoning and ecological threshold of natural Acer truncatum,and analyzes the rationality of the zoning results through field investigation of the sample points,providing theoretical basis for the reasonable location of artificial cultivation of natural Acer truncatum,the investigation and protection of natural germplasm resources,and the selection and breeding of excellent varieties.[Method]Based on 138 selected representative sample points,combined with 15 ecological factors,the MaxEnt model was applied to analyze the main ecological factors and threshold range affecting the distribution of natural Acer truncatum by knife cutting method.Then,the model results were evaluated by using the GIS simulation of the suitable area division in China and the subject work characteristic curve.After the evaluation,the sample points were investigated on the spot,and the rationality analysis was carried out on the zoning results.[Result]1)The ROC curve training set and test set AUC values of the regionalization results of the suitable areas of natural Acer truncatum were 0.968 and 0.947.2)The main ecological factors affecting the range of suitable areas of the natural Acer truncatum were average temperature in the driest season,precipitation in the wettest season,altitude,precipitation in the driest season and average annual temperature,with a cumulative contribution rate of 82.80%,and soil factors had little effect on the distribution of the natural Acer truncatum.It is suitable to grow in areas with average temperature of-12.50-3.82℃in the driest season,precipitation of 230-547 mm in the wettest season,altitude of 0-1 465 m,precipitation of 5-53 mm in the driest season and average annual temperature of 4.04-15.41℃.3)The main habitat area of the natural Acer truncatum spans 34°—46°N,108°—126°E,and concentrated in Inner Mongolia,Shaanxi,Hebei,Jilin,Shanxi,Liaoning,Shandong,Henan,Gansu and other provinces(autonomous regionsand municipalities),with an area of about 1 642 247 km2,accounting for 17.11%of the total land area of China.Among them,the high suitability areas are mainly located in Hebei,Liaoning and Shandong,with an area of 277 792 km2,accounting for 16.92%of the total suitability areas in China.4)The rationality of regionalization of suitable area was analyzed through field investigation of sample points.The overall regionalization accuracy of natural Acer truncatum was 0.82,and the Kappa coefficient was 0.61.[Conclusion]The suitable areas of the natural Acer truncatum are widely distributed in north China and parts of northeast and northwest China.Bioclimatic factors and altitude factors are the main limiting ecological factors for the growth of the natural Acer truncatum in China.In this study,the simulated zoning results of the suitable area of the natural Acer truncatum can reflect the spatial distribution characteristics of the natural Acer truncatum,and provide a theoretical basis for making full use of the natural resources and maximizing the economic value of the natural Acer truncatum.关键词
天然元宝枫/最大熵模型/适生区/生态阈值Key words
Acer truncatum/MaxEnt/suitable habitat/ecological threshold分类
农业科技引用本文复制引用
刘怡彤,郭慧,裴顺祥,吴莎,吴迪,辛学兵..基于MaxEnt模型的天然元宝枫在我国的适生区区划及合理性分析[J].林业科学,2023,59(12):13-24,12.基金项目
中国林科院中央级公益性科研院所基本科研业务费专项资金重点项目(CAFYBB2020ZB005) （CAFYBB2020ZB005）
科技部科技基础资源调查专项资金重点项目(2019FY100802_02). （2019FY100802_02）
