Floristic composition and structure of the shrub-arboreal component of the Parque Natural Municipal da Cratera de Colônia, São Paulo, SP. / Composição florística e estrutura do componente arbustivo-arbóreo do Parque Natural Municipal da Cratera de Colônia, São Paulo, SP

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

The conservation of the biodiversity has been theme debated in several environment meeting in the world. The forestal areas near urban centers have received little attention from conservative programs, because many people belief that these areas are irreparably degraded. However, if adequately investigated, these areas could be useful indicating the patterns to the regeneration, conservation and management their own diversity. With unequal soil and vegetation characteristics, the Cratera de Colônia constitutes one of these notable areas to scientific researches. The Parque Natural Municipal da Cratera de Colônia was established in 2007 in expectation to preserve the area, a forest fragment into a predominately rural and urban matrix under intensive anthropic interference. In this context the objectives of the present work are: (1) to characterize the floristic compostion and structure of the shrub-arboreal component of the Parque Natural Municipal da Cratera de Colônia; (2) to compare the structure and floristic diversity among parcels plotted in localities with different degradation degrees in each physionomy (Mata de Encosta, Mata de Turfeira and Mata de Brejo; (3) to give data improving the Management Plain of the park according limits imposed by legislation. In the study area were established 30 plots (20x20 m), ten in each phytophysionomy being five on anthropized localities and all individuals with stem perimeter at breast high (PBH 10 cm) were sampled. The floristic survey registered 1,643 specimens distributed in 133 species belonging to 88 genera and 50 families. The richest families were: Myrtaceae (14), Melastomataceae (12), Rubiaceae (11), Asteraceae (10), and Solanaceae (8). The species with major IVIs were: Eucalyptus robusta (9.89), Tibouchina mutabilis (6.95), Cyathea atrovirens (6.48), Syagrus romanzoffiana (6.44) and Critoniopsis quinqueflora (4,31). The diversity (Shannon index - H) was 3.81 and the equability (J) was 0.78, values similares to others Planalto Paulistano fragments. The floristic composition, the species richness and the diversity differing among the three phytophysionomies; the Mata de Encosta constitutes a group appart from Mata de Turfeira e Mata de Brejo. The differences can be explained by various factors, such as: the historical degradation in the area, the regeneration time, the isolated degree with others fragments, the pedological conditions and other environment data (water, declivity, luminosity). The anthropized parcels have the major diversity and richness. However, the afinity among the parcels is due the phytophysionomy more than the degradation degree.

ASSUNTO(S)

unidade de conservação cratera de colônia urban parks. fitossociologia fragmento urbano cratera de colônia forestal fragments phytossociology florística

ACESSO AO ARTIGO

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