Angiosperm disjunction "Campos rupestres - restingas": a re-evaluation

Acta Botanica Brasilica

Ruy José Válka Alves²  Leonora Cardin¹  Marcela Stuker Kropf¹ 

[1] ,Universidade Federal do Rio de Janeiro Museu Nacional Departamento de BotânicaRio de Janeiro RJ ,Brazil

关键词: disjunction;    campo rupestre;    restinga;    phytogeography;    floristics;    disjunção;    campo rupestre;    restinga;    fitogeografia;    florística;   

DOI  :  10.1590/S0102-33062007000300014

来源: SciELO

【 摘 要 】

A disjunct distribution pattern between the extrazonal formations of the campos rupestres (rocky grasslands) in the Espinhaço mountain range and the restingas (coastal strand vegetation) in Brazil has been proposed repeatedly for several flowering-plant species. In order to validate this distribution pattern, available data from the literature and major herbaria were compiled and evaluated. Some of these species also occur in campos rupestres on mountain ranges in Goiás state, campos de altitude (high altitude grasslands) of the Serra do Mar, and on geologically homologous rocky formations of the Guyana shield. Species that were also recorded for distinct zonal formations like cerrado, caatinga and forests were excluded from the pattern. The campo rupestre-restinga disjunction proved valid for 9 of 56 investigated species (16%). Explanations put forth by different authors for this unusual disjunction pattern are compared in the light of geological and climatological evidence.

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