A vegetação no município de Ventania (Paraná, Brasil)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

The municipality of Ventania is located in the central part of the Tibagi river basin which has mixed forests with typical components of the semi-deciduous seasonal forest and the mixed rain forest, besides the riverine areas, the fields and savannah. The mixed rain forest parts located in altitudes above 1000-1200m are called upper montane forests. The altitude and the proximity to watercourses are considered important environmental factors for the determination of the flora and the vegetation structure. The purposes of this work were to carry out a floristic survey of the municipality, and quantify and detect changes in the phytosociological structure in a fragment (24º.08’35.1’’S, 50º.18’30.3’’W) along an altitudinal gradient, or in relation to the proximity to water. As for the floristic survey, collections were carried out between April 2004 and November 2005 in different vegetation physionomies, and for the phytosociological one, 100 parcels of 10x10m, divided in 10 blocks, being five blocks in each valley slope, between altitudes from 1025 to 1057m, having the first block of each slope installed near the stream. In the floristic survey 548 vascular species were found, belonging to 115 families and 306 genera identified, being 211 types of trees, 58 liane or shrubs, 61 shrubs or herbs from the border or the interior of the forest, 16 epiphytes and 202 of herbaceous plants or field shrubs. In the phytosociological survey 1354 individuals belonging to 106 species, 75 genera and 44 families, were sampled. The species that were most emphasized in VI were Endlicheria paniculate, Matayba elaeagnoides and Ocotea nutans. There was a distinction of the alluvial environment and between blocks located in each slope. The municipality shows significant diversity of species and vegetation physionomies such as forests, fields and savannah enclaves. Nevertheless, activities such as agriculture, stockbreeding, the use of fire, selective deforestation and fragmentation cause changes in the natural environments that can, as time goes by, decharacterize these vegetation physionomies. Thus, conservation measures such as the creation of conservation units, and the increase in the environmental education together with the land owners must be implemented.

ASSUNTO(S)

paraná florestas - paraná vegetação - paraná comunidades vegetais - paraná forests trees paraná Árvores - paraná

ACESSO AO ARTIGO

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