Produtos florestais não-madeireiros : padrões de uso e conservação de Anadenathera colubrina (Vell.) Brenan no Agreste pernambucano

Abstract

Several populations dependent on the exploitation of local plant resources, but few studies have evaluated the forms of extraction of plant resources, and the impacts of this practice. This study evaluated the knowledge, use and exploitation of Anadenathera colubrina (Vell.) Brenan, "mimosa" for united rural community in Pernambuco, Brazil. This work also appropriated the Optimal Foraging Theory to detect possible patterns in the exploitation of bark and selective cutting. the signs were recorded, forms of use, explored parts and areas of A. colubrina resources. The density and the extraction of events in the "Sierra", the "land" and "saw standing" three resource areas known locally were recorded and the population structure in a collection area was used to infer the indirect impacts of exploration. 27 uses were recorded, and the medical category the most salient. 53 respondents (52.47%) said they know A. colubrina, though not necessarily the use efivamente. In this sense, effective use and knowledge Etam not related in the community, ie, use of quotes can not be used as an indirect measure of the use of pressure. further explored parts are the "shell" and the "stem" and the main collection areas are the "backyards" and "Sierra". Of the 1040 individuals of A. colubrina registered. 70 showed signs extraction. The population structure model fits the "inverted-J ', suggesting that the population is stable and that does not compromise the extraction carried viability. The results suggest that the distance of each collection site determines the extraction process, showing that residents minimize the time and energy spent in collecting A. colubrina. Environmental availability of each site does not influence the operation. For optimal variable bark extract is the amount of the resource. The distance of individuals of "mimosa", the management of time and the tannin content do not influence the bark extraction.