Data/hora: 16/06/2024 08:46:40

Provedor de dados: | 88
País: | Brazil
Título: | Habitat utilization and CAM occurrence among epiphytic bromeliads in a dry forest from southeastern Brazil
Autores: | Fontoura,Talita; Reinert,Fernanda.
Data: | 2009-09-01
Ano: | 2009
Palavras-chave: | Atlantic rainforest; Bromeliaceae; Canopy; Restinga vegetation.
Resumo: | We studied the community and habitat occupation of epiphytes to understand how these plants cope with a supposedly stressful habitat: i) how general epiphytes occupy tree trunks, ii) how epiphytic bromeliads, occupy their supportive trees, iii) how CAM bromeliads are spatially distributed. The study was done in the dry forest of Jacarepiá, State of Rio de Janeiro. Data collection on epiphytes, phorophytes, and trees was based on the point-center quarter method. The photosynthetic pathway of the bromeliad species was determined using isotope ratio mass spectrometry. The presence of Gesneriaceae, Araceae, and Cactaceae indicates that some humidity is present in the area allowing the presence of supposedly less-specialized epiphytes. There was no correlation between epiphyte abundance and phorophyte diameter, and phorophytes had larger sizes than trees that do not host epiphytes. There was correlation between tree diameter and bromeliad abundance, and lack of correlation between diameter and bromeliad richness. Only one species was typical of the understorey and one was typical of the canopy, while intermediate heights were occupied by different species. The only C3 bromeliad species (Vriesea procera (Mart. ex Schult.f.) Wittm.) was significantly more exposed than the other species. If CAM occurrence is related to water economy, the fact that a C3 species is subjected to more exposed conditions is remarkable. Further comments are presented on the proportion between CAM bromeliad species and abundance in dry forest. Regarding life forms, holoepiphytes, as opposed to hemiepiphytes, showed not to be restricted by the phorophyte's diameter suggesting a more successful establishment of this life form.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042009000300011
Editor: | Sociedade Botânica de São Paulo
Relação: | 10.1590/S0100-84042009000300011
Formato: | text/html
Fonte: | Brazilian Journal of Botany  v.32 n.3 2009
Fonte: | info:eu-repo/semantics/openAccess