On the rocks:Biogeography and floristic identity of rocky ecosystems in eastern South America  

作　　者：Luisa Azevedo Daniela Cristina Zappi Daniela Melo Garcia de Oliveira Leila Meyer Eimear Nic Lughadha Rosie Clegg Leonardo Dias Meireles Pablo Hendrigo Alves de Melo R.Toby Pennington Danilo M.Neves 

机构地区：[1]Programa de Pos-Graduacao em Ecologia,Conservacao e Manejo da Vida Silvestre,Instituto de Ciencias Biologicas,Universidade Federal de Minas Gerais,Belo Horizonte 31270-901,Braz [2]Programa de Pos-Graduacao em Botanica,Instituto de Ciencias Biologicas,Universidade de Brasilia,Brasilia 70910-9oo,Brazil [3]programa de Pos-graduacao em Biologia Vegetal,Instituto de Ciencias Biologicas,Universidade Federal de Minas Gerais,Belo Horizonte 31270-901,Brazil [4]The Herbarium,Royal Botanic Gardens,Kew,Richmond,Surrey TW93AE,UK [5]Geography,University of Exeter,Laver Building,North Park Road,Exeter EX44QE,UK [6]Gestao Ambiental,Escola de Artes,Ciencias e Humanidades,Universidade de Sao Paulo,Sao Paulo 03828-000,Brazil [7]Centro Nacional de Conservacao da Flora,Instituto de Pesquisas Jardim Botanico do Rio de Janeiro,Rio de Janeiro 2246o-030,Brazil [8]Royal Botanic Garden Edinburgh,2oa Inverleith Row,Edinburgh EH35LR,UK

出　　处：《Journal of Systematics and Evolution》2024年第2期305-320,共16页植物分类学报（英文版）

基　　金：support from Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior—Brasil(CAPES)Finance Code oo1.L.A.acknowledges Conselho Nacional de Desenvolvimento Cientifico e Tecnologico-CNPq/Brazil(SWE scholarship 200430/2022-0);support from Instituto Serrapilheira/Brazil(Serra-1912-32082);Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior—CAPES/Prlnt/Brazil(88887.474387/2020-00);Conselho Nacional de Desenvolvimento Cientifico e Tecnologico-CNPq/Brazil(Research Productivity Grant 311035/2021-3);D.Z.holds a productivity grant from CNPq(304178/2021-7)。

摘　　要：The geodiversity of rocky ecosystems includes diverse plant communities with specific names,but their continental-scale floristic identity and the knowledge on the role of macroclimate remain patchy.Here,we assessed the identity of plant communities in eastern Brazil across multiple types of rocky landscapes and evaluated the relative importance of climatic variables in constraining floristic differentiation.We provided lists of diagnostic species and an assessment of the conservation status of the identified floristic groups.We compiled a data set of 151 sites(4498 species)from rocky ecosystems,including campos rupestres,campos de altitude,granitic-gneiss lowland inselbergs,and limestone outcrops.We used unsupervised clustering analysis followed by ANosiM to assess floristic groups among sites.We performed a random forest variable selection to test whether the identified floristic groups occupy distinct climatic spaces.Six groups(lithobiomes)segregated floristically according to lithology and climate.Alongside campos de altitude and limestone outcrops,inselbergs were divided according to the biome in which they occur(Atlantic Forest or Caatinga),and campos rupestres were largely segregated according to their lithological matrix(ironstone or quartzitic).Plant communities of Caatinga inselbergs were more similar to limestone outcrops,while Atlantic Forest inselbergs communities resembled campos de altitude.The composition of plant communities on outcrops seems to be largely constrained by lithology,but climatic factors are also meaningful for sites with similar lithology.The current network of protected areas does not cover these unique ecosystems and their floristic heterogeneity,with Caatinga inselbergs and limestoneoutcrops beingtheleastprotected.

关 键 词：campos de altitude campos rupestres GEODIVERSITY inselberg IRONSTONE KARST limestone outcrops lithophytes rupicolous plant communities 

分 类 号：Q94[生物学—植物学]