Indicated species to restoration of riparian forests in subwatershed of Peixe-Boi river, para state/Especies indicadas para a recomposicao da floresta ciliar da sub-bacia do Rio Peixe-Boi, para

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) [greater than or equal to] 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 mombin, Tapirira guianensis and Virola guianensis are the most suitable species to restore the degraded areas, in association with Inga edulis, Jacaranda copaia, Pseudopiptadeniapsilostachya, Simarouba amara and Vismia guianensis of the secondary forests, that can be planted in the borders and in the nearby areas of igapo forests. Keywords: Amazonian; igapo forest; secondary forest; silviculture. Diante da importancia ecologica que as florestas ciliares representam para o equilibrio ambiental, este estudo objetiva indicar especies nativas para serem usadas na recomposicao de florestas ciliares degradadas existentes na sub-bacia do Rio Peixe-Boi. Foram inventariadas todas as arvores e arbustos com diametro a 1,30 m do solo [greater than or equal to] 5 cm em dez areas de floresta secundaria e seis de floresta de igapo. Os dados foram analisados pela Analise de Componentes Principais (ACP) e as especies avaliadas silviculturalmente atraves de revisao bibliografica. As areas de igapo tiveram baixo indice de riqueza e diversidade de Shannon, quando comparado com os dados das florestas secundarias. A composicao floristica dos igapos foi bem heterogenea, e ha maior similaridade floristica entre areas de