Dinámica del suelo y estoque de carbono después de diez años de la restauración de tierras degradadas usando especies arbóreas del bosque atlántico

Brazil's Atlantic Forest ecosystem has been greatly affected by land use changes, with only 11.26% of its original vegetation cover remaining. Currently, Atlantic Forest restoration is receiving increasing attention because of its potential for carbon sequestration and the important role of soil carbon in the global carbon balance. Soil organic matter is also essential for physical, chemical and biological components of soil fertility and forest sustainability. This study evaluated the potential for soil recovery in contrasting restoration models using indigenous Atlantic Forest tree species ten years after their establishment. The study site is located in Botucatu municipality, São Paulo State-Brazil, in a loamy dystrophic Red-Yellow Argisol site (Typic Hapludult). Four treatments were compared: i) Control (Spontaneous Restoration); ii) Low Diversity (five fast-growing tree species established by direct seeding); iii) High Diversity (mixed plantings of 41 species established with seedlings) and; iv) Native Forest (well conserved neighboring forest fragment). The following soil properties were evaluated: (1) physical-texture, density and porosity; (2) chemical-C, N, P, S, K, Ca, Mg, Al and pH; (3) biological-microbial biomass. Litter nutrient concentrations (P, S, K, Ca and Mg) and C and N litter stocks were determined. Within ten years the litter C and N stocks of the Low Diversity treatment area were higher than Control and similar to those in both the High Diversity treatment and the Native Forest. Soil C stocks increased through time for both models and in the Control plots, but remained highest in the Native Forest. The methods of restoration were shown to have different effects on soil dynamics, mainly on chemical properties. These results show that, at least in the short-term, changes in soil properties are more rapid in a less complex system like the Low Diversity model than in the a High Species Diversity model. For both mixed plantation systems, carbon soil cycling can be reestablished, resulting in increases in carbon stocks in both soil and litter.

Información y conocimiento para el análisis regional conducente a la toma de decisiones

Incluye Bibliografía

Las investigaciones sobre tierras indígenas en Brasil: una evaluación crítica

Incluye Bibliografía

́Toma que o filme é teú: Sai de Baixo entre o teleteatro e a sitcom

A program recorded in a theater, with the audience, incorporating all of the improvisations and later televised. That was Sai de Baixo, TV Globos program broadcasted between 1996 and 2002. However, a specific episode limit this article. Toma 0que o filmeéteu, 1998, was made alive. Was it a spasm of the old teleplay Or was it just a common sitcom episode To answer these questions, the paper used a case study, bibliographical and documentary research and concluded that this episode was not a brief return of teleplay, having in mind that the fact of being alive is not a requirement to be teleplay, but there are other criteria.

Acceso al poder y participación en la toma de decisiones en América Latina y el Caribe: políticas de equidad de género hacia el año 2000 = Access to power and participation in decision-making in Latin America and the Caribbean: policies for gender equity looking to the year 2000

Incluye Bibliografía

Selección de información para la toma de decisiones en el sector transporte = The choice of information for decision making in the transport sector

Incluye Bibliografía

Ecosistema del pastoreo andino en las tierras altas de los Andes Centrales

Incluye Bibliografía

La estructura agraria y el campesinado en El Salvador, Guatemala y Honduras

Incluye Bibliografía

Desarrollo con equidad, ¿un nuevo cuento de hadas para los años noventa?: proceso de toma de decisiones, formulación de políticas y desarrollo social en América Latina

Incluye Bibliografía

Estado y formulación de políticas sociales en América Latina: lineamientos para el estudio del proceso de toma de decisiones en el área de la salud

Incluye Bibliografía

Sistema de toma de decisiones para la gestión urbana en la ciudad de Córdoba, Argentina

Incluye Bibliografía

Manual para la toma de decisiones multicriterio

Incluye Bibliografía

La participación comunitaria en la toma de decisiones de la escuela rural: su rol en la dinámica de mejoramiento del aprendizaje

Incluye Bibliografía