FLORISTICS AND PHYTOSOCIOLOGICAL STRUCTURE OF THE TREE COMPONENT OF THE CASTANHAL MUNICIPAL NATURAL PARK

Abstract

The study aimed to carry out a floristic and phytosociological survey of tree species in the Municipal Natural Park of Castanhal, Pará. The Park area has 15ha, data collection was carried out in the phytophysiognomies of solid ground forest, planted forest and floodplain forest, where 20 plots of 20m x 25m were implemented, totaling 10,000m² (1ha), distributed across the entire length of the phytophysiognomies in a random manner. The tree inclusion level was DBH ≥ 10cm and height estimated with a graduated stick. 422 individuals were sampled, distributed in 38 families, 85 genera and 98 species. The families with the greatest floristic richness were Fabaceae, Arecaceae, Meliaceae, Lecythidaceae, Malvaceae, Salicaceae, Urticaceae, Apocynaceae, Burseraceae and Chrysobalanaceae. The species with the highest importance value (IV) were Bertholletia excelsa Bonpl., Dipteryx odorata (Aubl.) Forsyth f., Abarema jupunba (Willd.) Britton & Killip, Swietenia macrophylla King, Simarouba amara Aubl., Hevea brasiliensis (Willd. ex A. Juss.) Müll.Arg. and Inga alba (Sw.) Willd. The community presented a high index of floristic diversity (Shannon-Wiener, H’= 3,78). The study highlighted the presence of rich plant diversity in the Castanhal Municipal Natural Park. With the data obtained in the research, it will be possible to develop conservation and management strategies in the park area, contributing to preserving the local biodiversity.