The current status and spatial distribution characteristics of ancient tree resources in Xingning Basin of Guangdong
Ancient tree resource is a category of forest genetic resources that garner significant interest due to their substantial historical,cultural,and scientific research value.This study conducted a compre-hensive survey of the extant ancient tree resources within the Xingning Basin in Guangdong,and found that a total of 364 individual trees existed with the majority being classified as third-grade ancient trees,comprising 94.23％of the total.These ancient trees are distributed across 26 families,33 genera,and 38 species,with a dominance of the Altingiaceae and Moraceae families.The predominant species in-clude Ficusconcinna(Miq.)Miq.,Altingiagracilipes Hemsl.,Castanopsishystrix Hook.f.& Thomson ex A.DC.,Celtissinensis Pers.,and Liquidambar formosana Hance.The ancient trees in the Xingning Basin demonstrate distinctive spatial distribution characteristics and high biodiversity,with a spatial ker-nel density of 0.172 trees/km2 and an altitudinal distribution ranging from 98 to 529 meters.According to the natural breakpoint method,the elevation zone from 92 to 278 meters has the richest ancient tree re-sources,with a total of 279 trees accounting for 76.65％of the overall count.Geographically,the north-ern and eastern sections of the basin,namely Luofu Town and Jingnan Town,exhibit the highest distribu-tion densities,with 56 trees(15.38％)and 40 trees(10.99％)respectively,and a kernel density be-tween 0.55 to 0.67 trees/km2.However,the overall growth condition of the ancient trees is deemed moderate,with 67.31％in a normal growth state,while 32.69％are in a weakened or endangered con-dition.It is thus essential to implement appropriate conservation and restoration measures for these weak-ened or endangered ancient trees to maintain their ecological value and biodiversity.
Xingning Basinancient treesdistributionspatial characteristicsGuangdong Province
万方数据
维普
