Composição floristica e fenologia da mata ciliar e mata de encosta, adjacentes ao rio Lençois, Lençois, BA

AUTOR(ES)
DATA DE PUBLICAÇÃO

1997

RESUMO

The present study presents a characterization of the riparian and montane (slope) forests along and adjacent to the Lençóis River, in the Municipality of Lençóis, Chapada Diamantina (Diamond Highlands), Bahia State, Brazil (120 33 S e 410 25 W) based on their floristic composition, structure and phenology. A floristic survey was made of the trees and woody vines, and a phytosociological survey was done on the forest componente Measurements of frequency, density, reIative dominance, and the importance value index were made at the species level, as well as the importance value index (IVI) for families. Phenological observations were made, noting the phenophases of leaf falI, leaf growth, flowering and fruiting, while for the woody vines, only flowering and fruiting, were observed. The floristic study in the riparian forest identified 87 tree species, belonging to 67 genera and 34 families of the Magnoliophyta. In the montane forest were found 56 species, belonging to 49 genera and 31 families. In both habitats there were identified a total of 33 species of woody vines, belonging to 26 genera and 13 families of Magnoliophyta. Comparing the floristic composition of the two forest types studied with other areas in Brazil revealed significant similarities with the forests in the Serra do Espinhaço Range, as well with those in southern Bahia State. The study was able to identify a number of tree species as indicator species for riparian forest in the Chapada Diamantina. Identification keys were prepared and brief descriptions and commentaries were made on all species, stressing vegetative characteristics. Field observations made in both forest types revealed a moderate peak of leaf fall in the dry season, and increased leaf budding, flowering and fruiting in the rainy season. The two forest types were predominately perennial, although of the two, the montane forest demonstrated a more pronounced deciduous componente. The woody vines generally showed more flowering and fruiting activity at the start of the dry season

ASSUNTO(S)

florestas tropicais comunidades vegetais ecologia vegetal botanica - classificação dinamica de vegetação

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