Data/hora: 02/06/2024 11:24:44

Provedor de dados: | 39
País: | Brazil
Título: | Species richness and distribution of bryophytes within different phytophysiognomies in the Chapada Diamantina region of Brazil
Autores: | Valente,Emilia de Brito; Pôrto,Kátia Cavalcanti; Bastos,Cid José Passos.
Data: | 2013-06-01
Ano: | 2013
Palavras-chave: | Mosses; Liverworts; Forests; Campos rupestres; Elevational zonation.
Resumo: | The Chapada Diamantina ecoregion is within the caatinga (shrublands) biome of Brazil. Environmental factors determine the phytophysiognomies that distinguish the ecoregion from the surrounding areas. This study aimed to investigate the distribution of bryophyte flora in this ecoregion, by phytophysiognomy and elevational zone. Analyzing specimens we collected from five municipalities in the region, together with specimens (previously collected from the region) in herbaria, we identified 400 taxa. The phytophysiognomies that presented the highest species richness and the greatest numbers of exclusive taxa were forests and campos rupestres (dry, rocky grasslands), which respectively accounted for 51% and 40% of the taxa, compared with only 5% and 4%, respectively, for the caatinga and cerrado (savanna). Species richness and the numbers of exclusive taxa were highest in the lower and upper montane zones. There was a predominance of neotropical taxa and a significant number of disjunct species found in Brazil and in the Andes region. We conclude that the Chapada Diamantina region is an important center of bryophyte diversity, harboring not only a great number of species overall but also a considerable number of species exclusive to the region, primarily in forests and campos rupestres at elevations above 800 m.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000200006
Editor: | Sociedade Botânica do Brasil
Relação: | 10.1590/S0102-33062013000200006
Formato: | text/html
Fonte: | Acta Botanica Brasilica  v.27 n.2 2013
Fonte: | info:eu-repo/semantics/openAccess