Evaluating the role of fire over a decade in a tropical mountainous forestgrassland mosaic  

作　　者：Juliana KUCHENBECKER Yumi OKI Flávio CAMAROTA Frederico S.NEVES Diego R.MACEDO Bárbara SILVA FERREIRA Ramiro AGUILAR Lorena ASHWORTH Ezequiel FABIANO Bárbara DIAS ARAÚJO Amanda PONCE DE LEON Bruna RIBEIRO SILVA Thamyris BRAGIONI Fernando FIGUEIREDO GOULART JoséEugênio CÔRTES FIGUEIRA Geraldo WILSON FERNANDES 

机构地区：[1]Departamento de Genética,Ecologia e Evolução,Instituto de Ciências Biológicas,Universidade Federal de Minas Gerais-UFMG,Belo Horizonte,MG 31270-901,Brazil [2]Programa de Pós-graduação Biodiversidade e Uso de Recursos Naturais,Universidade Estadual de Montes Claros-UNIMONTES,Montes Claros,MG 39401-089,Brazil [3]Departamento de Geografia,Instituto de Geociências,Universidade Federal de Minas Gerais-UFMG,Belo Horizonte,MG 31270-901,Brazil [4]Instituto Multidisciplinario de Biologia Vegetal,CONICET-Universidad Nacional de Córdoba,X5000JJC,Córdoba,Argentina [5]Department of Wildlife Management and Ecotourism,University of Namibia,Katima Mulilo,Katima Mulilo 20001,Namíbia [6]Departamento de Botânica,Instituto de Ciências Biológicas,Universidade Federal de Minas Gerais-UFMG,Belo Horizonte,MG 31270-901,Brazil [7]Knowledge Center for Biodiversity,Belo Horizonte,MG 31270-901,Brazil

出　　处：《Journal of Mountain Science》2024年第12期4191-4207,共17页山地科学学报（英文）

基　　金：supported by the National Council for Scientific and Technological Development(CNPq)(PELD-441515/2016-9);Minas Gerais State Research Foundation(FAPEMIG)for the funding of the long-term ecological research"PELD Campos Rupestres da Serra do Cipó",and by the Bio-Bridge Initiative(BBI)/CDB-Cascading Long Term Effects of Fire on Savanna Biodiversity in the Southern Hemisphere,Brazil and Namibia for providing additional resources to carry out the study.JK thanks the INCT EECBio(Ecologia,Evolução e Conservação da Biodiversidade)and CNPq for a postdoctoral grant(380009/2023-4);YO thanks Fapemig for her postdoctoral grant(APQ 0031-19);FC thanks CAPES,and FAPEMIG for postdoctoral grants.FSN and GWF thank CNPq for the fellowship grant.DRM thanks CNPq(311002/2023-4)for funding;BSSF and BDA thank Fapemig.RA and LA thanks FONCyT(PICT 2019-1897).EF thanks BBI(UN Environment Programme).APL and BRS thank Fapemig(APQ 0031-19);TLSB thanks CAPES and CNPq.FFG thanks PPBio and FINEP for a postdoctoral grant(01.20.0201.00).

摘　　要：Forest-grassland mosaics comprise a major component of tropical landscapes,hosting invaluable biodiversity and providing essential ecosystem services to hundreds of millions of people worldwide.While open biomes often benefit from disturbance,forests can particularly be susceptible to structural changes resulting from such disruptions.Here we evaluate the influence of fire on the structure and landscape properties within natural forest islands immersed in a matrix of megadiverse montane grasslands.We conducted this study in 15 forest islands located in southeastern Brazil,assessing its fire frequency,intensity,and post-fire time over an eleven-year period from January 2012 to December 2022.Our results show that fire frequency is linked to soil characteristics and the percentage of herbaceous cover within the forest islands.We also found that the post-fire time is related to the percentage cover of the forest islands’associated herbs and shrubs.However,neither fire frequency,intensity,nor post-fire time was connected to significant changes in plant species richness,abundance,or in the upper vegetation strata(tree species richness and abundance,and canopy cover)in the interior of the forest islands.Furthermore,these fire-related variables did not result in temporal changes in the forest island’s canopy variation or landscape metrics.Our results underscore a low fire frequency and intensity within our study area,potentially explaining the limited fire-associated impact,and primarily on the lower vegetation strata.Despite acknowledging the relative stability of these forest islands under current fire regimes,we suggest further studies that can experimentally manipulate not only fire but also other anthropic disturbances for understanding the temporal dynamics of the forest islands and,consequently,their preservation.This perspective is indispensable for comprehensively understanding the ecological consequences of anthropogenic disturbances in natural forest islands.

关 键 词：Campo Rupestre Fire Ecology Forest islands Mountain ecosystems Remote Sensing Serra do Cipó 

分 类 号：S762[农业科学—森林保护学] S71[农业科学—林学]