Indicated species to restoration of riparian forests in subwatershed of Peixe-Boi river, Pará State

Abstract

This study aims to indicate native species to be used in the restoration of degraded riparian forests in the subwatershed of Peixe-Boi river. All trees and shrubs with diameter at breast height (DBH) > 5 cm were inventoried in ten areas of secondary forest and six areas of igapo forest. The results were analyzed by Principal Component Analysis and the silviculture of the species was assessed by literature review. In Igapo areas 66 species were found; the areas had low richness and low diversity index of Shannon, when compared with data from the secondary forests. The floristic composition was heterogeneous, and the floristic similarity is higher between areas that are closer geographically. In the secondary forests were found 175 species; the areas showed high abundance of individuals, high species richness, diversity and evenness. Secondary forests were separated according to geographic proximity and age, which is directly linked to the successional stage. The PCA analysis established the ecological importance of 29 tree species; however only ten species had enough silvicultural information. Due to a greater ecological importance and viable silvicultural techniques available in the literature, Carapa guianensis, Pachira aquatica, Spondias 1 Engenheiro Florestal, Bolsista de Iniciacao Cientifica, Universidade Federal Rural da Amazonia, Caixa Postal 917, CEP 66077-530, Belem (PA), Brasil. dovale.igor@gmail.com 2 Engenheiro Florestal, Dr., Professor Associada do Instituto Socio Ambiental e de Recursos Hidricos, Universidade Federal Rural da Amazonia, Caixa Postal 917, CEP 66077-530, Belem (PA), Brasil. gonzaga.costa@ufra.edu.br 3 Biologa, Dra., Professora Associada do Instituto Socio Ambiental e de Recursos Hidricos, Universidade Federal Rural da Amazonia, Caixa Postal 917, CEP 66077-530, Belem (PA), Brasil. izildinha.miranda@ufra.edu.br Recebido para publicacao em 27/12/2011 e aceito em 2/04/2013