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A atividade madeireira tem sido uma alternativa para o desenvolvimento da Amazonia e mais conhecimento sobre as especies exploradas comercialmente se faz necessario para melhoria das tecnicas de manejo. Objetivou-se conhecer o comportamento fenologico de tres importantes especies comerciais: Goupia glabra Aubl., Vochysia inundata Ducke e Vouacapoua americana Aubl. O estudo foi realizado no municipio de Porto Grande, Amapa, e teve 28 meses de observacoes. As especies apresentaram influencia no padrao vegetativo e reprodutivo quando relacionadas ao regime pluviometrico da regiao. A especie Vochysia inundata manifestou floracao apenas no primeiro ano de monitoramento, as demais especies apresentaram padrao anual de floracao, iniciando durante na epoca de menor precipitacao pluviometrica. A frutificacao foi observada principalmente durante o periodo chuvoso e tambem na transicao da estacao chuvosa para a seca. O padrao decidual de mudanca foliar foi caracteristico na especie Vouacapoua americana, com a maior concentracao de queda de folhas durante o periodo chuvoso. A B S T R A C T Timber exploitation has been an alternative to the development of the Amazon and more knowledge of the commercially exploited species is necessary to improve management techniques. This study aimed to know the phenological behavior of three important commercial species: Goupia glabra Aubl, Vochysia inundata Ducke and Vouacapoua americana Aubl. The study was conducted in the municipality of Porto Grande, Amapa, and had 28 months of observations. The species had influence on the vegetative and reproductive pattern when related to rainfall in the region. The Vochysia inundata species expressed flowering in the first year of monitoring, the other species presented annual flowering pattern, starting at the time of lower rainfall. The fruiting phase was observed mainly during the rainy season and also in the transition from the rainy to dry. The deciduous leaf pattern shift was characteristic in Vouacapoua americana species with the largest leaf drop in concentration during the rainy season. Keywords: phenology, phenophases, forest management.

revista brasileira de geografia física

Comportamento Fenológico de Espécies Florestais com Potencial Madeireiro em Ecossistema de Terra Firme, Amazônia Oriental (Phenological Behavior of Forest Species with Timber Potential in Terra Firme Ecosystem, Eastern Amazon)