The influence of soil on vegetation structure and plant diversity in different tropical savannic and forest habitats  

作　　者：Priscyla Maria Silva Rodrigues Carlos Ernesto Gonçalves Reynaud Schaefer Jhonathan de Oliveira Silva Walnir Gomes Ferreira Júnior Rubens Manoel dos Santos Andreza Viana Neri 

机构地区：[1]Universidade Federal do Vale do São Francisco,Campus Senhor do Bonfim,Colegiado de Ecologia,Av.Tomaz Guimarães,S/N,Bairro Santos Dumont,Senhor do Bonfim,BA,CEP 48.970-000,Brazil [2]Universidade Federal de Viçosa,Departamento de Solos,Campus Universitário,Viçosa,MG,CEP 36570-900,Brazil [3]Instituto Federal de Educação,Ciência e Tecnologia do Sul de Minas Gerais,Rodovia Machado-Paraguaçu,Km 3,Machado,MG,CEP 37750-000,Brazil [4]Universidade Federal de Lavras,Departamento de Ciências Florestais,Laboratório de Conservação e Manejo da Biodiversidade,Campus Universitário,Lavras,MG,CEP 37200-000,Brazil [5]Universidade Federal de Viçosa,Departamento de Biologia Vegetal,Laboratório de Ecologia e Evolução de Plantas,Campus Universitário,Viçosa,MG,CEP 36570-900,Brazil

出　　处：《Journal of Plant Ecology》2018年第2期226-236,共11页植物生态学报（英文版）

基　　金：Fundação de AmparoàPesquisa do Estado de Minas Gerais(FAPEMIG);Secretaria de Estado de Ciência,Tecnologia e Ensino Superior(SECTES-MG)(FAPEMIG-SECTES-MG agreement 12.070/09).

摘　　要：Aims Soil plays an important role in the formation and heterogene-ity of habitats and thus can cause changes in vegetation struc-ture and plant diversity.The differentiation between Cerrado/savanna and forest is well known,but the relationship between soil and habitats from savannic or forest formations still needs to be better understood,particularly in tropical ecotonal areas.We studied the association between attributes of plant com-munities,namely structure and diversity,and physicochemical characteristics of soils in the Caatinga domain at the transition to Cerrado in Brazil.Methods Chemical and physical analyses of soils were performed in samples of 38 plots from savannic formations and 30 plots from forest forma-tions.Vegetation was characterized floristically and structurally in all plots,five habitats being assessed in each plant formation.Soil features and vegetation parameters were highly distinct among the different habitats.Important Findingsin general,forest habitats were more nutrient rich than savannic formation.Furthermore,soil variables showed effects both on vegetation structure and on its species diversity,more pronouncedly in the savannic formations.Habitats were structurally distinct,and diversity differed between savannic and forest communities;however,a higher differentiation occurred when the savannic formation habitats were compared among them.Although plant diversity did not differ among forest formation habitats,soil attributes showed a close relationship with edaphic factors and can contribute for similar vegetation.The soil-vegetation relationship in highly diverse ecotonal landscapes is important from the conservation biology point of view and aid in the execution of proactive plans for the maintenance of biodiversity.Thus,we noticed that diversity and soil behaves distinctly between savannic and forest communities.

关 键 词：CERRADO dry forest edaphic variation vegetation-soil relationship ECOTONE 

分 类 号：S15[农业科学—土壤学]