Composição florística de fragmento de floresta secundária em áreas de proteção permanente do Igarapé Dispensa, no Projeto de Assentamento Assurini em Altamira – Pará

Abstract

The need to preserve permanent preservation areas (APPs) is increasing due to their importance for the survival of populations of fauna and flora that use these natural resources and for the protection of watercourses. The objective of this study was to characterize floristic composition and diversity in a secondary forest fragment in an APP in the Assurini Settlement Project in Altamira – Para, identifying species that could be used to replace degraded riparian forests in the region. The study was carried out in a secondary forest on the banks of Igarape Dispensa, on the properties of family farmers. Two plots measuring 10 m x 25 m were established in each area, in which all woody and non-woody individuals with DBH ≥10 cm present within the limits of each sample unit were inventoried. Floristic composition was analyzed, and richness and diversity were estimated. In the secondary forest, 279 individuals, 49 species, 43 genera and 26 families were identified. The family with the largest number of species and individuals was Fabaceae. The Shannon-Weaver (H’) diversity index was 3.43 nats/ind, considered to be of satisfactory diversity. The species found have the potential to be used in regeneration proposals for APPs of Igarape Dispensa.