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

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journal of Plant Ecology 2018年第2期11卷 226-236页

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 Universidade Federal do Vale do São Francisco Campus Senhor do BonfimColegiado de EcologiaAv.Tomaz GuimarãesS/NBairro Santos DumontSenhor do BonfimBACEP 48.970-000Brazil Universidade Federal de Viçosa Departamento de SolosCampus UniversitárioViçosaMGCEP 36570-900Brazil Instituto Federal de Educação Ciência e Tecnologia do Sul de Minas GeraisRodovia Machado-ParaguaçuKm 3MachadoMGCEP 37750-000Brazil Universidade Federal de Lavras Departamento de Ciências FlorestaisLaboratório de Conservação e Manejo da BiodiversidadeCampus UniversitárioLavrasMGCEP 37200-000Brazil Universidade Federal de Viçosa Departamento de Biologia VegetalLaboratório de Ecologia e Evolução de PlantasCampus UniversitárioViçosaMGCEP 36570-900Brazil

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 *** 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 *** 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 *** Chemical and physical analyses of soils were performed in samples of 38 plots from savannic formations and 30 plots from forest *** was characterized floristically and structurally in all plots,five habitats being assessed in each plant *** features and vegetation parameters were highly distinct among the different *** Findingsin general,forest habitats were more nutrient rich than savannic ***,soil variables showed effects both on vegetation structure and on its species diversity,more pronouncedly in the savannic *** were structurally distinct,and diversity differed between savannic and forest communities;however,a higher differentiation occurred when the savannic formation habitats were compared among *** plant diversity did not differ among forest formation habitats,soil attributes showed a close relationship with edaphic factors and can contribute for similar *** 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 ***,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

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Efects of topographic variability and forest attributes on fne-scale soil fertility in late-secondary succession of Atlantic Forest

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Ecological Processes 2021年第1期10卷 853-861页

作者： Alice Cristina Rodrigues Pedro Manuel Villa walnir gomes ferreira‑júnior Carlos Ernesto RGSchaefer Andreza Viana Neri Laboratory of Ecology and Evolution of Plants‑LEEP Departamento de Biologia VegetalPrograma de Pós-Graduação em Botânica-Universidade Federal de ViçosaViçosaMinas Gerais CEP:36570‑900Brazil. Fundación Para la Conservación de la Biodiversidad MéridaEstado Mérida CEP 5101Venezuela. Departamento de Engenharia Florestal Universidade Federal de ViçosaViçosaMinas Gerais CEP:36570‑900Brazil. Laboratório de Botânica eEcologia Setor de Biologia e Meio AmbienteInstituto Federal do Sul de Minas Gerais(IFSULDEMINAS)Campus MachadoRodovia Machado‑Paraguaçukm 3MachadoMinas Gerais CEP 37750‑000Brazil. Departamento de Solos Universidade Federal de ViçosaViçosaMinas Gerais CEP:36570‑900Brazil.

Background:Understanding how soil fertility changes due to topographical conditions and forest attributes is an essential premise for local-scale forest management *** evaluated the efects of topographic variables and forest attributes on soil fertility along a local topographical gradient in a Brazilian Atlantic *** hypothesised that soil fertility is positively afected by topographic variability and forest attributes(structure and diversity).We used tree species richness,composition,abundance,and aboveground biomass as forest *** analysed two 1-ha for‑est patches with contrasting topographical *** used diferent linear mixed efects models(LMMs)to test the main efects of diferent forest attributes and topography variables on soil ***:The results showed that higher topographic variability determines soil fertility along a fne-scale *** frst two axes of the PCA explained 66.8%of the variation in soil data,with the frst axis(PCA_(1))explaining 49.6%of the variation in soil data and positively correlating with fertility-related soil *** second axis(PCA_(2))explained 17.2%of the variation in topographical data and positively correlated with convexity(the elevation of a plot minus the average elevation of all immediate neighbour plots)and *** best models showed that topo‑graphic variables(elevation and convexity)are the main predictors that afect fne-scale soil ***:Our study demonstrates that the topographic variability,mainly elevation and convexity,determines fne-scale soil fertility in an Atlantic *** results advance our understanding that context-dependent condi‑tions based on topography and soil properties have a high variability at a fne scale,which can infuence variations in forest attributes(i.e.,species distribution,diversity and structure of tree communities).In addition,the information generated in this research may be important for planning forest restorat

关键词： Convexity Soil variability Succession Topographical gradient Tropical forests

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