Diverse responses of fungal functional groups to desertification in forest soils of Pinus densata on the Chinese Tibetan plateau  

作　　者：Jiani Hua Jiangbao Zhang Baohan Song Tianyi Wang Jingji Li Nan Yang Lingfeng Mao 

机构地区：[1]Co-Innovation Center for Sustainable Forestry in Southern China,Laboratory of Biodiversity and Conservation,College of Ecology and Environment,Nanjing Forestry University,210037 Nanjing,People’s Republic of China [2]Institute of Ecological Resources and Landscape Architecture,Chengdu University of Technology,610059 Chengdu,People’s Republic of China

出　　处：《Journal of Forestry Research》2024年第5期120-130,共11页林业研究（英文版）

基　　金：supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB31000000);the Second Tibetan Plateau Scientific Expedition and Research Program(No.2019QZKK0307);the Key Project of the Open Competition in Jiangsu Forestry(No.LYKJ[2022]01);the Jiangsu Social Development Project(BE2022792).

摘　　要：Rapid increase in desertification is an environ-mental concern,especially for the health and sustainabil-ity of ecosystems in changing climates.How ecosystems respond to such changes may be partially understood by studying interactions and performance of critically impor-tant groups such as soil fungi functional groups.This study investigated variations in diversities of three soil fungi functional guilds(saprotrophic,symbiotic,pathogenic)and influencing abiotic factors in a Pinus densata forest on the southeast Tibetan Plateau where desertification is intense.The results indicate desertification significantly decreased the proportion of dominant fungal guild-symbiotic fungi(mean relative abundance decreasing from 97.0%to 68.3%),in contrast to saprotrophic fungi(increasing from 2.7%to 25.7%)and pathogenic(from 0.3%to 5.9%).Soil pH had the most significant impact on fungal community structure and negatively correlated with symbiotic fungal richness,which was significantly lower in arid soils,and positively correlated with saprotrophic and pathogenic fungal alpha-diversity,which were abundant.Different community struc-tures and regulators of the three fungi communities were observed,with pH,total phosphorus and ammonium(NH_(4)^(+))as the main determinants.This study links the biotic and abi-otic components during desertification and the interactions between them,and may be used as indicators of ecosystem health and for amendments to mitigate the effects of a chang-ing climate.

关 键 词：DESERTIFICATION Fungal diversity Saprotrophs Ectomycorrhizal fungi Climate change 

分 类 号：S714[农业科学—林学]