%0 Journal Article
%T Banco de sementes de esp¨¦cies arb¨®reas em floresta estacional no Rio Grande do Sul, Brasil
%A Scherer
%A Caroline
%A Jarenkow
%A Jo£¿o Aandr¨¦
%J Brazilian Journal of Botany
%D 2006
%I Scientific Electronic Library Online
%R 10.1590/S0100-84042006000100007
%X soil seed bank composition provides basic informations about the potential regeneration of a community, allowing further inferences about successional processes. in a permanent 0.5 ha plot (50 square 100 m2 sample units) of seasonal forest located on a south facing slope in the state park of itapu£¿, municipality of viam£¿o (rs), the composition and distribution of tree species in the soil seed bank were analyzed. litter and soil from two depths (0-5 and 5-10 cm) were collected in all sample units, in the spring (september 2002) and fall (march 2003). the collected material was left to germinate in a greenhouse under two distinct light conditions, natural and with a lattice-shade cover (50%). species composition and density was relatively similar (jaccard index = 0.67) for the two seasons. a comparison with the known tree composition of the same area indicated a very low similarity, for both seasons. the absence of significative difference between periods may reflect a relatively homogeneous humid subtropical condition, in which the seasonality does not show strength. the presence of both shade-tolerant and light-demanding species in the seed bank indicates a high potential of regeneration for the tree component, in the case of gap formation or other disturbances to the present forest structure.
%K forest regeneration
%K seasonal forest
%K soil seed bank
%K tree component.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0100-84042006000100007&lng=en&nrm=iso&tlng=en