Florística e fitossociologia de uma mata de restinga da costa da APA de Urumajó, município de Augusto Corrêa-Pará

Abstract

Restinga is defined as the environment that occurs adjacent to the ocean on Quaternary sandy plains. As part of the coastal ecosystem it has a vegetation related to the variation of abiotic factors such as sand deposition, salinity and sun exposure, making it one of the most complex ecosystems in existence. This work aimed to know the floristic and phytosociological composition of a stretch of dune forest of the Urumajó APA, located in the municipality of Augusto Corrêa between the geographic coordinates 00° 52' 54" Se 46° 26' 54" W, and contribute to the knowledge of the flora of the restingas of the state of Pará, as well as to provide basic subsidies for the management plan and conservation of the APA. The inventory was made through the method of plots, with 20 sampling units of 5x10m. Fertile botanical material was collected and deposited in the Herbarium of the Goeldi Museum (MG). A total of 194 individuals were sampled, distributed among 10 species and 9 families. The Anacardiaceae family was the only one with two species, the others were represented by only one. The families with the highest number of individuals were Anacardiaceae and Arecaceae. The highest VIs were registered for Tapirira guianensis Aubl. and Anacardium occidentale L. The forest is formed by individuals with an average height of 5.53m and maximum height of 31m and the basal area per hectare was 32.105. It has low species richness and, contrary to the forests described for the Brazilian coast, it did not present species of Myrtaceae.