Abstract

SOUZA, Priscila Bezerra de; MARTINS, Sebastião Venâncio; COSTALONGA, Sumami Rebonato  and  COSTA, Grasiely de Oliveira. Floristic and structure of tree-shrub vegetation in understory of Eucalyptus grandis W. Hill ex Maiden stands, in Viçosa, MG, Brazil. Rev. Árvore [online]. 2007, vol.31, n.3, pp. 533-543. ISSN 0100-6762.  http://dx.doi.org/10.1590/S0100-67622007000300019.

The objective of the present study was to analyze the floristic composition and structure of tree-shrub vegetation in understory of Eucalyptus grandis W. former Hill Maiden, Paraíso Forest Reserve, Viçosa, MG. Forty adjacent 5 x 5 m plots were demarcated and arranged in 5 x 50 m transects, in which individuals were measured, identified and classified in relation to seed dispersal syndromes and successional categories. Eight hundred and eighty four individuals belonging to 50 species and 22 families were recorded. The species with the highest Importance Value were Psychotria sessilis, Siparuna guianensis and Erythroxylum pelleterianum, particularly with regard to high density. Late secondary species with zoochorous dispersal syndromes prevailed in density. The founded floristic richness can be considered high for a Eucalyptus grandis understory and reflects the potential for using the species as catalyst for native tree-shrub vegetation in degraded areas.

Keywords : Eucalyptus grandis; forest catalyst; understory.