Estratégia de colonização de Uricuri (attalea phalerata mart. ex spreng. arecaceae) em áreas antropizadas por atividade pecuária no leste do Acre

Abstract

This study aimed to analyze the high concentration of the palm Attalea phalerata in pastures located in the east of Acre state. For this, three areas with the presence of this palm were evaluated: a pasture in use for livestock, an abandoned pasture in stage of natural regeneration and a fragment of primary forest. It was first tested in the forest fragment the theory of Janzen-Connell to check if there is an increase of individuals of A. phalerata with the increase of the distance from the parent plant. It was found that there was a significant decrease in the total number of individuals as there is a distance from the parent plant and also taking into consideration only the seedlings. The next step was to estimate population structure of this palm in the three areas, then it was found that both the number of seedlings as the total amount of individuals uricuri were significantly higher in grassland in use. Finally, the seeds were evaluated in relation to distance from the parent plant in relation to the total quantity, predation by insects, consumed by rodents, by both and intact ones, then these values were faced between each of the three environments. It was found that there was significant difference in seeds consumed by rodents and eaten by insects in these places. These results contributed to assert that the possible cause of elevated reproductive individuals in grassland is probably due to a period of neglect it suffers up to the point that it’s already in the stage of natural regeneration which is favorable to its establishment, and when it is cleared to create a new pasture, the high concentration of adults becomes apparent since they are not overturned and are resistant to fire.