Estudo da estrutura e funcionamento de um fragmento florestal em Corumbataí do Sul, Paraná

Abstract

This paper was developed at Corumbataí Sul city, Paraná, at Mr Gerson Rodrigues’ property. This research was developed in 3600 m² of semideciduous montane forest where the leveraged vegetables individuals are distributed heterogeneous and irregular shape within six plots of 30 x 20 meters. Transect along was characterized as a soil granulometry and also quantified the nutrient compositions. Part of this phytosociology study was constituted with a forest survey of 461 vegetables individuals, belonging to 23 different species, being the most abundant species: Parapiptadenia rigida (154), Maclura tinctoria (55), Allophylus edulis (50), Cordia americana (35) and Eucalyptus sp (13). The value of the diversity index was 2,129 and the equitability of 0,6979 which showed low values in relation with other studies with the same forest formation. The presence of some exotic species has occurred as Taquara sp, Tecoma stans and Dasyphyllum brasiliense, confirming the anthropized state of the fragment under study. Parapiptadenia rigida, plays as the key role in the recovery of degraded areas, Allophylus edulis and Cordia americana, have a great contribution to the fauna and flora relationship keeping the ecosystemic balance. The soil was classified as (NEOSSOLO LITÓLICO EUTRÓFICO típico) udorthent typical eutrophic, which are shallow soils, poorly developed, with large presence of gravels, more than 70%. Thus although the soil is considered fertile and stony, it represents the major limiting due a depth for the development of plant roots, influencing strongly on the composition and forest structure in the study. Are indicated some management measures, as a control of exotic plants, planting of native species in the area and control of invasion of cattle in the area.