FLORÍSTICA, ESTRUTURA E DINÂMICA EM UMA FLORESTA OMBRÓFILA MISTA NO NORTE DO ESTADO DE SANTA CATARINA

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

02/03/2011

RESUMO

The floristic composition, horizontal structure, diametrical distribution and the dynamics (ingrowth, increment, mortality) were evaluated in a remaining of a Ombrophyllous Mixed Forest, located in the National Forest of Três Barras, Três Barras City, Santa Catarina State, within a period of 5 years (2004-2009). In 2004, it were installed and measured 26 permanent plots, each one with 1 ha of area. These plots were subdivided into 10 m x 50 m (0.05 ha) adding up to 20 subunits by plot and a total of 520 subunits. In 2009 these plots were remeasured, and in both occasions, all trees with 1,3 m of diameter (DAP) equal or superior to 10 cm were measured, botanically identified, numbered and positioned according to the coordinates X,Y. It were found 18,977 boles and 18,754 trees (721.30 trees/ha) in 2004, and 18,649 boles and 18,427 trees (708.73 trees/ha), in 2009. In both measurements it were identified 72 species belong to 30 families and 53 genus. The diversity index of Shannon (H), Simpson (C) and Pielou equability index (J), indicated that the studied area has a high floristic diversity and homogeneity. According to the hytosociologic parameters of horizontal structure, Araucaria angustifolia (Bertol.) Kuntze, Ocotea porosa (Nes &Mart.) Barroso, Cupania vernalis Cambess., Ocotea puberula (Rich.) Nes, Ilex paraguariensis A. St-Hil., Cinnamomum vesiculosum (Ness) Kostem., Syagrus romanzoffiana (Cham.) Glassman, Jacaranda micrantha Cham., Clethra scabra Pers. e Myrcia rostrata DC. are the most important species in the forest under study. As expected, the forest presented a decreasing diametric distribution. The periodic annual increment in diameter was 0.27 cm/year. The basal area was 31.14 m/ha in 2004, and 33.49 m/ha in 2009, with an average increment of 0.47 m/ha/year. The annual mortality rate of the arboreal individuals was 2.14% and the annual rate of ingrowth, 2.01%. The results, notably from the basal area, indicate that the forest continue growing to reach its full stock and consequently its maturity.

ASSUNTO(S)

floresta com araucária, fitossociologia, incremento florestamento e reflorestamento araucaria forest, phytosociology, increment

ACESSO AO ARTIGO

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