Avaliação de dois trechos de uma Floresta Estacional Semidecidual restaurada por meio de plantio, com 18 e 20 anos, no Sudeste do Brasil / Evaluate of two patch of an Semideciduous Seasonal Forest restored through a plantation, with 18 and 20 years, in Southeastern of Brazil

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

Restoration actions in degraded areas have been widely used, as much for legal requirements as for initiatives of groups worried about the ambient quality, in this way not having an standardizing of this actions. Appearing the necessity to evaluate if the employed methodologies are reaching its objective and providing a self-sustentation of the formed forest community. The present work had as objective to describe the community of tree and shrub from restored area, by a high diversity plantation, after 18 and 20 years of your implementation. The study was developed in Semideciduous Seasonal Forests (FES) at Iracemápolis City in São Paulo, Southeastern of Brazil (22°35S and 47°31W). The regional climate is Cwa, according to Köppen classification, with precipitation varying from 1.100 to 1.700mm per year. The plantation was realized between 1988 and 1990, in approximately 50ha. It was realized a floristic and phytosociological survey from two areas with 1,0ha each, where had been sampled individuals with perimeter at breast height equal or bigger than 10cm for calculate phytosociological parameter and diversity indices of equability. The showed species had been classified according to sucessional class and the syndrome of dispersion. Forest physiognomy was verified in the two studied areas. It has been found 2,532 individuals alive, distributed in 52,05% at area 1 and 47, 95% at area 2, and were distributed in 143 species, composing 40 families. The canopy heights had been less than found in FES remained, however, the diversity and equability index, and the absolute density has been among the value obtained to FES. The species that had presented greater growth had been Lafoensia glyptocarpa, Melia azedarach, Pterocarpus violaceus, Centrolobium tomentosum, Cariniana estrellensis, Triplaris americana, Cariniana legalis and Balfourodendron riedelianum in the area 1 and Luehea divaricata, Pterogyne nitens, Citharexylum myrianthum and Triplaris americana in area 2. Had been verified individuals with different vegetal life forms from introduced species as well as tree and shrub species different from implemented. Most of the regenerate individual was from pioneering and initial secondary species, and the biggest species, in height and in basal area had been coming from the planted species. It is concluded that the two areas are restored and present characteristic of secondary vegetation, the initial composition from used species and respective sucessional class had influenced the forest composition formed with 18 and 20 years. The use of high diversity in plantations of restoration present with high importance to re-establishing of the structure, enabling the development of existing process in a natural forests, especially in areas not connected with fragments of natural forests.

ASSUNTO(S)

environment degradation degradação ambiental ecologia florestal environment protection forest ecology native plants plantas nativas proteção ambiental reflorestamento. reforestation. florestas - restauração forests restoration

ACESSO AO ARTIGO

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