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Social participation and biodiversity conservation in Santa Maria Yavesia, Oaxaca, Mexico. Trejo, Irma*,1, Hernandez, Josefina1, Aguilar, Alejandra2, Benitez, Esteban2, Ramos, Fernando3, 1 Instituto de Geografia, UNAM, Mexico, D.F., Mexico2 Facultad de Ciencias, UNAM, Mexico, D.F., Mexico3 Santa Maria Yavesia, Distrito de Ixtlan, Oaxaca, Mexico ABSTRACT- Oaxaca state, located on the South of Mexico, owns about 30 000 km2 of temperate forests. Particularly, Sierra de Juarez has been considered as a diversity center. Most of these forests are under a social property regimen, known as community property. Objective. To analyze the magnitude and the conservation state of the forests located at Santa Maria Yavesia to know the role that social participation plays in conservation. Methods. For the study to take place field samples of vegetation will be taken in areas of 1000 m2; structural basic parameters and regeneration were registered on these areas. Through the use of satellite images Landsat ETM, the vegetal cover of the studied area is analyzed and then compared within a regional context. Results. Yavesia lies at the river head of the basin of the Papaloapan river, it covers a 9000 area in an altitudinal gradient that goes from 1900 to 3200 m a.s.l, where Abies hickelii forests are established, pine and oak forests where 9 species of Pinus have been registered, among them we can find P. hartewi, P. ayacahuite, P. leiophylla, P. oaxacana, and 13 Quercus such as Q. acutifolia, Q. ocoteafolia, Q. glabrescens, Q. laurina, Q. obtusatha, Q. laeta, Q. castanea, Q. affinis. These species show their environmental preferences, contributing to beta diversity. Structural parameters show a good state of the conservation of forests. About 90% of the area that belongs to the community is covered by forests; therefore, this also represents an important carbon reservoir. Conclusion. By own decision Yavesias inhabitans have declared their forests as a conservation area based on a culture of water that has prevailed through generations. It needs to be recognized the role that this social participation plays on resources conservation when the cover and state of this forests is compared with other zones near it where forest management prevails. SPANISH ABSTRACT- Introducion. El estado de Oaxaca, situado en el Sur de Mexico, mantiene actualmente alrededor de 30 000 km2 de bosques templados. Particularmente la Sierra de Juarez, incluso ha sido considerada como un centro de diversidad. La mayor parte de estos bosques están bajo el regimen de propiedad social, conocida como propiedad comunal. Objetivo. Analizar la magnitud y el estado de conservación de los bosques de Santa María Yavesía con el objeto de reconocer cual es el papel de la participación social en la conservación. Metodos. Para el estudio se realizaron recorridos de campo, muestreos de vegetación en areas de 1000 m2, en los cuales se registraron los parametros estructurales basicos, así como la presencia de regeneración. Por medio del uso de imágenes de satelite Landsat ETM, se analiza la cobertura vegetal del area estudiada y se compara en un contexto regional. Resultados. Yavesia se establece en la cabecera de la cuenca del rio Papaloapan, cubre un area de 9000 ha en un gradiente altitudinal que va de los 1900 a los 3200 m s.n.m, en donde se establecen bosques de Abies hickelii, bosques de pino y de encino en donde se han registrado hasta ahora 9 especies de Pinus entre ellas P. hartewi, P. ayacahuite, P. leiophylla, P. oaxacana, y 13 de Quercus como Q. acutifolia, Q. ocoteafolia, Q. glabrescens, Q. laurina, Q. obtusatha, Q. laeta, Q. castanea, Q. affinis. Estas especies muestran sus preferencias ambientales, lo cual contribuye a la diversidad |
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