Are the cerrado and the seasonal forest woody floras assembled by different processes despite their spatial proximity?  

作　　者：Raquel Carolina Miatto Marco Antonio Batalha 

机构地区：[1]Department of Botany,Federal University of São Carlos,PO Box 676,13565-905,São Carlos,Brazil [2]Department of Biology,University of São Paulo,14040-901,Ribeirão Preto,Brazil

出　　处：《Journal of Plant Ecology》2018年第5期740-750,共11页植物生态学报（英文版）

基　　金：We are grateful to São Paulo Research Foundation(FAPESP,grant 2012/18295-4);to Coordination for the Improvement of Higher Education Personnel(CAPES,grant BEX 12105/13-9)for the scholarships granted to the first author;to the National Council for Scientific and Technological Development for financial support and scholarship granted to the second author(CNPq,grant 305912/2013-5);to São Paulo Forestry Institute,for research permission;to the Vaçununga State Park staff,for logistical assistance;to M Groppo and WM Mantovani,for helping us with species identification;to N Abe,ALS Albino,KR Coelho,P Dodonov,JR Freitas,CS Gonçalves,DT Gregolin,LA Joaquim,MB Leite,WB Nascimento,LV Nóbrega,BA Severian and CB Zanelli,for help with field work;to JR Freitas for revising an earlier draft of this manuscript;to EF Gray for revising the latest version of this manuscript;to Wiley for permitting the repro-duction of Figure 1,and to G Sonnier and an anonymous reviewer for their comments.

摘　　要：Aims The Brazilian cerrado occupies land that could be occupied by seasonal forest,given current climatic conditions and their spatial proximity.Soil has been identified as one of the main determinants of cerrado and forest prevalence.We tested whether cerrado and seasonal forest woody floras were assembled by different processes.We postulated that soil nutrient availability would account for dif-ferences in the functional and phylogenetic structure of the cerrado and the seasonal forest.Methods In 1005×5 m plots distributed along cerrado and seasonal forest patches in south-eastern Brazil,we sampled five individuals with a basal diameter≥3 cm from 127 species and measured seven of their functional traits(plant height,basal area,tortuosity,leaf size,specific leaf area,leaf dry matter content,and leaf toughness).We constructed a phylogenetic tree and calculated the pairwise mean functional-phy-logenetic distances(MFPDs),an approach that accounts for functional and phylogenetic information both separately and combined.We also sampled soils to a depth of 5 cm in each plot and had their chem-ical and physical properties determined.We related the MFPD to soil properties and compared MFPD between cerrado and forest species.Important Findings Phylogenetic distances were higher than functional distances in both cerrado and seasonal forest communities,suggesting trait convergence in both environments.Irrespective of the importance given to functional or phylogenetic information,most of the com-munities in the cerrado and in the seasonal forest fell within the null expectation,implying either that multiple assembly processes can occur simultaneously along the gradient of soil fertility,or that not all important traits were included.MFPD was related to soil nutrient status when only functional distances were considered.In this case,MFPD was lower in the cerrado than in the forest,indi-cating that soil nutrient availability influenced plant traits,with the low-nutrient soils in the cerrado constraining the range of variat

关 键 词：competition functional traits environmental filter nutrient limitation PHYLOGENY SAVANNA 

分 类 号：S15[农业科学—土壤学]