Fungal diversity and community composition responses to the reintroduction of fire in a non-managed Mediterranean shrubland ecosystem  

作　　者：Juncal Espinosa Tatek Dejene Mercedes Guijarro Xim Cerdá Javier Madrigal Pablo Martín-Pinto 

机构地区：[1]Centre for the Research and Technology of Agro-Environmental and Biological Sciences,University of Trás-os-Montes e Alto Douro,Vila Real,Portugal [2]Sustainable Forest Management Research Institute,University of Valladolid,Palencia,Spain [3]Ethiopian Forestry Development,Addis Ababa,Ethiopia [4]Instituto de Ciencias Forestales(ICIFOR-INIA),CSIC,Madrid,Spain [5]Estaciógica de Doñana,CSIC,Sevilla,Spain [6]University Polytechnic of Madrid,ETSI Montes,Forestal y Medio Natural,Madrid,Spain

出　　处：《Forest Ecosystems》2023年第2期268-278,共11页森林生态系统（英文版）

基　　金：Spanish R&D projects MYCOINFOR(Mycosilviculture Applied to Forest Fire Prevention in Mediterranean Systems;PID2019-105188RB-I00);VIS4FIRE(Comprehensive vulnerability of forest systems to fire:implications for forest management tools;RTA2017-00042-C05-01);Interreg-POCTEP CILIFO(Iberian Centre for Research and Forest Firefighting;0753-CILIFO-5-E);financed by European Social Fund“NextGenerationEU”through a grant“Margarita Salas”awarded to Juncal Espinosa into the project GFIRE。

摘　　要：Background:More than a decade of fire suppression has changed the structure of fire-adapted shrubland ecosystems in Spain’s National Parks,which are now at extreme risk of uncontrolled wildfires.Prescribed burning can mitigate the risk of wildfires by reducing the fuel load but prescribed burning may also alter the soil properties and reduce microbial and fungal activity,causing changes in the availability of nutrients deep in the soil layer.Although fungal communities are a vital part of post-fire restoration,some fire effects remain unclear.To examine the short-term effects of prescribed burning on soil fungal communities in Doñana Biological Reserve(SW Spain),we collected soil samples pre-burn and 1 day,6 and 12 months post-burn from burned plots to perform physicochemical and metabarcode DNA analyses.Results:Prescribed burning had no significant effect on the total fungal operational taxonomic unit richness and abundance.However,changes in soil pH,nitrogen and potassium content post-burn affected fungal community composition.Small non-significant changes in pH and phosphorous affected the composition of ectomycorrhizal fungi.Conclusions:The ectomycorrhizal fungal community appears to be resilient to the effects of low-to moderate-intensity fires and saprotrophic taxa may benefit from this kind of fire.This finding revealed that prescribed burning is a potentially valuable management tool for reducing fire hazards in shrublands that has little effect on the total richness and abundance of fungal communities.

关 键 词：Doñana National Park Ectomycorrhizal fungi Fire ecology Forest management Global change Prescribed burning WILDFIRE Saprotrophic fungi 

分 类 号：S762[农业科学—森林保护学]