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O objetivo deste trabalho foi caracterizar a fenologia de uma populacao natural de Terminalia fagifolia Mart, localizada em ecotono entre os Biomas Cerrado e Caatinga, no municipio de Bom Jesus, sul do Estado do Piaui. Vinte individuos, com distância minima de 20 metros entre si, foram marcados, utilizando GPS. Os dados fenologicos foram coletados durante um ano e as fenofases observadas foram brotacao, desfolhamento, floracao e frutificacao. Para analise dos dados foram utilizados indices de atividade, intensidade e sincronia, alem da correlacao de Spearman que avaliou dados fenologicos em conjunto com variaveis ambientais. A analise fenologica indicou presenca de todas as fenofases durante o periodo de estudos, sendo o desfolhamento observado continuamente, variando apenas em seu grau de intensidade. A populacao estudada apresentou sincronia perfeita entre os individuos nas fenofases desfolhamento e brotacao. Quanto a correlacao de Spearman, os resultados nao indicaram correlacoes significativas entre fenofases e variaveis ambientais. Phenology of tree species in Caatinga / Cerrado boundary in southern Piaui Abstract : The aim this work was to characterize the phenology of Terminalia fagifolia Mart. in a Cerrado/Caatinga boundary , in Bom Jesus, Piaui, Brazil. Twenty individuals were marked using GPS. The phenological study was conducted for 1 year and were observed the phenophases sprouting, leaf loss, flowering and fruiting. For analysis of phenological data were used the index of activity, the synchronism index and correlation of Spearman. The phenological analysis indicated the presence of all phenophases during the study period, with defoliation observed continuously, varying only in their degree of intensity. The study population had a perfect synchrony between individuals to defoliation and sprouting. Regarding the Spearman correlation the results did not indicate significant correlations between phenophases and environmental variables.

Fenologia de uma espécie arbórea em ecótono Caatinga / Cerrado no sul do Piauí