Re-examining hypotheses concerning the use and knowledge of medicinal plants: a study in the Caatinga vegetation of NE Brazil
Open Access
- 26 July 2006
- journal article
- research article
- Published by Springer Science and Business Media LLC in Journal of Ethnobiology and Ethnomedicine
- Vol. 2 (1), 30
- https://doi.org/10.1186/1746-4269-2-30
Abstract
The Caatinga (dry land vegetation) is one of the most characteristic vegetation types in northeastern Brazil. It occupies a large percentage of the semi-arid region there, and generally supports two major types of economic activity: seasonal agriculture and the harvesting of plant products. However, very little information is available concerning the interaction of people with the plants of the Caatinga. A study was undertaken with the participation of 31 adults from a rural community in the state of Pernambuco, Brazil, in order to analyze the patterns of use of medicinal plant resources, and to test a number of hypotheses concerning their use and local knowledge about them. The sources of medicinal plants used by the local community, the differences in oral information concerning the use of plants with their effective uses, and the role of exotic plants in local folk medicine practices were examined. Forty-eight plant species were cited as having medicinal uses, of which 56.25% are native to the Caatinga region. The patterns of harvesting and the importance of these trees and shrubs as medicinal plants seem to be compatible with a hypothesis based on the seasonal availability of plant resources. There is no direct correlation between known medicinal plants and those used by the local population, which agrees with observations made in different tropical regions. However, this observation was not interpreted in terms of the idea of "erosion" of knowledge (commonly used to explain this lack of correlation), but rather to propose two new concepts: "mass knowledge" and "stock knowledge". Native plants are a very significant component of locally used medicinal plants, although exotic plants are important for treating specific health problems – which leads the proposal of a hypothesis of diversification.Keywords
This publication has 29 references indexed in Scilit:
- Is the use-impact on native caatinga species in Brazil reduced by the high species richness of medicinal plants?Journal of Ethnopharmacology, 2007
- Use patterns and knowledge of medicinal species among two rural communities in Brazil's semi-arid northeastern regionJournal of Ethnopharmacology, 2006
- Revising the Cultural Significance Index: The Case of the Fulni-ô in Northeastern BrazilField Methods, 2006
- Structure and floristics of homegardens in Northeastern BrazilJournal of Arid Environments, 2005
- Life strategy and chemical composition as predictors of the selection of medicinal plants from the caatinga (Northeast Brazil)Journal of Arid Environments, 2005
- Use of plant resources in a seasonal dry forest (Northeastern Brazil)Acta Botanica Brasilica, 2005
- Medical Ethnobotany of the Teribes of Bocas del Toro, PanamaJournal of Ethnopharmacology, 2005
- The role of weeds as sources of pharmaceuticalsJournal of Ethnopharmacology, 2004
- Conhecimento botânico tradicional e conservação em uma área de caatinga no estado de Pernambuco, Nordeste do BrasilActa Botanica Brasilica, 2002
- Overview of the Brazilian caatingaPublished by Cambridge University Press (CUP) ,1995