Espécies arbóreas do Parque Nacional de Sete Cidades, Piauí, Brasil: modelagem de nicho ecológico e aspectos do conhecimento local

Abstract

Ecological Niche Modeling (NEM) has become a common procedure to determine the extent of predictive distribution of tree species. The Sete Cidades National Park located in the Northeast portion of Piauí, contains an area distributed in 6,221 hectares, is an environment conducive to the development of scientific studies, mainly for being a Federal Conservation Unit of Integral Protection. The objective of this work is to determine the geographic distribution and to evaluate the impact of the variables in the habitat prediction of current adaptation of tree species in the Sete Cidades National Park, Piauí, Brazil. A guided tour was held, where the 24-hour walk was chosen. Thus, six species were selected for modeling according to environmental and socioeconomic relevance, Jatobá (Hymenaea courbaril L) (845 individuals); Janaguba (Himatanthus drasticus (Mart.) Plumel) (780 individuals); Faveira (Parkia platycephala Benth.) (936 individuals); Tingui (Magonia pubescens A.St.-Hil.) (304 individuals); (Caryocar coriaceum Wittm) (302 individuals) and the Pau d'arco (Handroanthus impetiginosus (Mart. Ex DC.)) (241 individuals), all models were statistically more robust than random (AUC ≥ 0.5). of Parkia platycephala was concentrated in 26,19 km 2, while for Himatanthus drasticus the potential niche was extended by 18.44 km 2 The potential area of Hymenaea courbaril was estimated at 16.19 km 2 The model predicted 12.01 km 2 area The potential map of Caryocar coriaceum encompassed the largest area among species about 15.06 km2. Finally, the potential map of the Magonia pubescens an area between species about 16.66 km2. In conclusion, it observed It was observed that in the landscape scale, the topoclimatic and texture variables of the vegetation cover presented a model with good performance and validity to predict the potential distribution. Parkia platycephala had the largest area.