Vegetation structure and edaphic factors in veredas reflect different conservation status in these threatened areas  

作　　者：Yule Roberta Ferreira Nunes Camila Silveira Souza Islaine Francielly Pinheiro de Azevedo Odirlei Simôes de Oliveira Leidivan Almeida Frazão Rúbia Santos Fonseca Rubens Manoel dos Santos Walter Viana Neves 

机构地区：[1]Programa de Pós-Graduaçao Em Botânica Aplicada,Departamento de Biologia Geral,Universidade Estadual de Montes Claros,Avenida Dr.Ruy Braga,S/N-Bairro Vila Mauricéia,Montes Claros,Minas Gerais,39401-089,Brazil [2]Laboratório de Ecologia Vegetal,Universidade Estadual de Montes Claros,Avenida Dr.Ruy Braga,S/N-Bairro Vila Mauricéia,Montes Claros,Minas Gerais,39401-089,Brazil [3]Instituto de Ciências Agrarias-Universidade Federal de Minas Gerais,Avenida Universitária,1.000-Bairro Universit�ario,Montes Claros,Minas Gerais,39404-547,Brazil [4]Departamento de Ciências Florestais,Universidade Federal de Lavras,CP 3037,Lavras,Minas Gerais,37200-000,Brazil [5]Instituto Mineiro de Gestao dasÁguas,Secretaria de Estado de Meio Ambiente e Desenvolvimento Sustentável,Avenida JoséCorreia Machado,900-Bairro Ibituruna,Montes Claros,Minas Gerais,39401-832,Brazil

出　　处：《Forest Ecosystems》2022年第3期387-395,共9页森林生态系统（英文版）

基　　金：supported by the Long-term Ecological Research Network(PELD-VERE)of the Conselho Nacional de Desenvolvimento Científico e Tecnologico(CNPq 441440/2016-9,441583/2020-2,308877/2019-5),Coordenaçao de Aperfeiçoamento de Pessoal de Nível Superior(CAPES 88887.136273/2017-00);Fundaçao de Amparoa Pesquisa do Estado de Minas Gerais(FAPEMIG APQ-04816-17,CRAPPM-00539-18,APQ-04816-17);FAPEMIG(FAPEMIG/RED-00253-16)for the support;the second author scholarship.

摘　　要：Background:In Cerrado humid areas,veredas are considered as hygrophilous communities,marked by the presence of the Mauritia flexuosa palm tree emerging in the wetter zones.Changes in veredas ecosystems due to drought and changes in the water table,which represent important areas for biodiversity maintenance in the Brazilian cerrado,can lead to the emergence of new landscapes and ecosystems.Assuming that the veredas are changed in species composition due to anthropogenic factors,in this study,we evaluated the flora composition and described the current vegetation profile of two veredas under different disturbances levels that are located in the north of Minas Gerais State,Brazil.Results:Altogether,2,268 individuals of 91 species belonging to 36 families were recorded.Our results demonstrated that the studied veredas were floristically different in terms of the arboreous-shrubby species composition,richness,and diversity.Despite the hygrophilous forest formations and open areas in the two veredas present typical species from these environments(same species with high importance values),the drought in the water table caused an expansion of Cerrado species in the open areas and in the hygrophilous forest.Furthermore,in the hygrophilous forest there was an increase in the abundance of species that occur in less saturated soils.Conclusion:Our results demonstrate that the studied veredas are changing in species composition due to anthropogenic factors which leads to the drought of these formations(water balance effect).These anthropogenic effects cause a modification with the expansion and increase in the abundance of typical species of other areas of Cerrado and resistant to less saturated soils,leading to the veredas collapse.Finally,future studies should investigate other veredas on a broader scale to detect changes in the water table that lead to a consequent change in vegetation structure.In this way,we will have support for the conscientious management and conservation of these areas that represent equilibrium plac

关 键 词：CERRADO CONSERVATION Palm swamp Plant distribution Climate change Water balance effect Vereda drought Phytosociological analysis 

分 类 号：Q948.113[生物学—植物学]