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23 resultados encontrados para: AUTOR: Vaca Genuit, Raúl Abel
11.
Tesis - Maestría
Influencia del paisaje urbano sobre poblaciones de áfidos y sus enemigos naturales: implicaciones para la producción agroecológica / Juan Carlos Vázquez Cid
Vázquez Cid, Juan Carlos ; Ferguson, Bruce G. (tutor) (1967-) ; Morales, H. (asesora) ; Vaca Genuit, Raúl Abel (asesor) ;
San Cristóbal de Las Casas, Chiapas, México : El Colegio de la Frontera Sur , 2013
Clasificación: TE/635.926097275 / V3
Cerrar
SIBE Campeche
ECO040005097 (Disponible)
Disponibles para prestamo: 1
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SIBE Chetumal
ECO030007815 (Disponible)
Disponibles para prestamo: 1
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SIBE San Cristóbal
ECO010016510 (Disponible)
Disponibles para prestamo: 1
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SIBE Tapachula
ECO020012910 (Disponible)
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SIBE Villahermosa
ECO050005302 (Disponible)
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12.
Tesis - Doctorado
Deforestación y fragmentación de bosques secos en la Depresión Central de Chiapas, México / Raúl Abel Vaca Genuit
Vaca Genuit, Raúl Abel ; Golicher, Duncan John (tutor) ; Cayuela Delgado, Luis (asesor) ; Newton, Adrian C. (asesor) ; Ramírez Marcial, Neptalí (asesor) (1963-) ;
San Cristóbal de Las Casas, Chiapas, México : El Colegio de la Frontera Sur , 2012
Clasificación: TE/333.751370972 / V3
Cerrar
SIBE Campeche
ECO040004601 (Disponible)
Disponibles para prestamo: 1
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SIBE Chetumal
ECO030007519 (Disponible)
Disponibles para prestamo: 1
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SIBE San Cristóbal
ECO010015131 (Disponible)
Disponibles para prestamo: 1
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SIBE Tapachula
ECO020011889 (Disponible)
Disponibles para prestamo: 1
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SIBE Villahermosa
ECO050004834 (Disponible)
Disponibles para prestamo: 1
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Índice

Capítulo 1. Introducción y métodos generales
1.1. Introducción general
1.2. Objetivos
1.3. Objetivos específicos, hipótesis y preguntas
1.4. Organización de la tesis doctoral
1.5. Métodos generales
Capítulo 2. Evidence of incipient forest transition in Southern Mexico
2.1. Resumen en castellano
2.2. Introduction
2.3. Methods
2.4. Results
2.5. Discussion
2.6. Conclusions
2.7. Tables and figures
Capítulo 3. Applying climatically based random forest models to downscale coarse grained potential vegetation maps in tropical México
3.1. Resumen en castellano
3.2. Introduction
3.3. Methods
3.4. Results
3.5. Discussion
3.6. Conclusions
3.7. Tables and figures
Capítulo 4. Impact of human land use on dry forest biodiversity in the Central Depression of Chiapas, Mexico
4.1. Resumen en castellano
4.2. Introduction
4.3. Methods
4.4. Results
4.5. Discussion
4.6. Conclusions
4.7. Tables and figures
Capítulo 5. Drivers of deforestation in the Central Depression of Chiapas: Inference on process from pattern analysis using generalised additive models
5.1. Resumen en castellano
5.2. Introduction
5.3. Methods
5.4. Results
5.5. Discussion
5.6. Conclusions
5.7. Tables and figures
Capítulo 6. Discusión y conclusiones generales


13.
Artículo
Evidence of incipient forest transition in southern Mexico
Vaca Genuit, Raúl Abel (coaut.) ; Golicher, Duncan John (coaut.) ; Cayuela Delgado, Luis (coaut.) ; Hewson, Jenny (coaut.) ; Steinmann, Víctor W. (coaut.) ;
Contenido en: PLoS ONE Vol. 7, no. 8, e42309 (August 2012), p. 1-15 ISSN: 1932-6203
PDF PDF
Resumen en: Inglés |
Resumen en inglés

Case studies of land use change have suggested that deforestation across Southern Mexico is accelerating. However, forest transition theory predicts that trajectories of change can be modified by economic factors, leading to spatial and temporal heterogeneity in rates of change that may take the form of the Environmental Kuznets Curve (EKC). This study aimed to assess the evidence regarding potential forest transition in Southern Mexico by classifying regional forest cover change using Landsat imagery from 1990 through to 2006. Patterns of forest cover change were found to be complex and non-linear. When rates of forest loss were averaged over 342 municipalities using mixed-effects modelling the results showed a significant (p<0.001) overall reduction of the mean rate of forest loss from 0.85% per year in the 1990–2000 period to 0.67% in the 2000–2006 period. The overall regional annual rate of deforestation has fallen from 0.33% to 0.28% from the 1990s to 2000s. A high proportion of the spatial variability in forest cover change cannot be explained statistically. However analysis using spline based general additive models detected underlying relationships between forest cover and income or population density of a form consistent with the EKC.

The incipient forest transition has not, as yet, resulted in widespread reforestation. Forest recovery remains below 0.20% per year. Reforestation is mostly the result of passive processes associated with reductions in the intensity of land use. Deforestation continues to occur at high rates in some focal areas. A transition could be accelerated if there were a broader recognition among policy makers that the regional rate of forest loss has now begun to fall. The changing trajectory provides an opportunity to actively restore forest cover through stimulating afforestation and stimulating more sustainable land use practices. The results have clear implications for policy aimed at carbon sequestration through reducing deforestation and enhancing forest growth.


14.
- Artículo con arbitraje
*En hemeroteca, SIBE-San Cristóbal
Potencial erosivo en la Reserva de la Biosfera El Triunfo, Chiapas, México
Vásquez Montoya, Iván de Jesús ; López Mendoza, Sergio (coaut.) ; Zambrano Solís, José (coaut.) ; Palacios Silva, Rodolfo José (coaut.) ; Vaca Genuit, Raúl Abel (coaut.) ; López Báez, Walter (coaut.) ;
Contenido en: Lacandonia Año 6, Vol. 6, no. 2 (diciembre 2012), p. 101-106 ISSN: 2007-1000
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
52477-10 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-San Cristóbal
Resumen en español

En este estudio se cuantifica, analiza y compara la erosión hídrica potencial en la Reserva de la Biosfera El Triunfo (REBITRI), ya que es imprescindible tener datos de susceptibilidad a la erosión hídrica, para una correcta gestión y manejo del mismo. Según FIDA y FMAM en el 2002 el suelo se considera un recurso primordial a nivel mundial pero a la vez se pierden 467.4 millones de hectáreas a causa de la desertificación. En México la erosión hídrica se considera la principal causante de este fenómeno (INE, 2007). Por esta razón ubicar las zonas con riesgo a la erosión hídrica es primordial para promover estrategias de conservación, para ello se utilizó el modelo de la Ecuación Universal de Pérdida de Suelo (E.U.P.S) implementando herramientas de Sistemas de Información Geográfica (S.I.G). Este análisis determinó que en la REBITRI la distribución de la erosión hídrica potencial en la superficie va de 0% Baja, 20% Moderada, 77% Alta y 3% Muy alta esto según la clasificación de la FAO. Además se determinó que la zona núcleo el Venado es más susceptible a erosionarse y la menos afectada es la zona núcleo El Triunfo.

Resumen en inglés

In this manuscript quantifies, analyzes and compares the water erosion potential in the Biosphere Reserve El Triunfo (REBITRI) as it is essential to have data of susceptibility to water erosion, for proper management and handling. According to IFAD and the GEF in 2002, the soil is considered a major resource in the world yet is 467.4 million hectares lost because of desertification in Mexico. Water erosion is considered the main cause of this phenomenon (INE, 2007). For this reason locate areas at risk of water erosion is essential to promote conservation strategies for this model was used in Equation Universal Soil Loss (USLE) tools implementing Geographic Information Systems (GIS). This analysis determined that the REBITRI the distribution of potential water erosion on the surface ranges from 0% Low 20% Moderate 77% 3% High and Very High this according to the FAO classification. It also found that the core area is more susceptible Deer to erode and the least affected is the core area the Triumph.


15.
- Artículo con arbitraje
Resumen en: Inglés |
Resumen en inglés

Livelihoods of people living in many protected areas (PAs) around the world are in conflict with biodiversity conservation. In Mexico, the decrees of creation of biosphere reserves state that rural communities with the right to use buffer zones must avoid deforestation and their land uses must become sustainable, a task which is not easily accomplished. The objectives of this paper are: (a) to analyze the conflict between people's livelihoods and ecosystem protection in the PAs of the Sierra Madre de Chiapas (SMC), paying special attention to the rates and causes of deforestation and (b) to review policy options to ensure forest and ecosystem conservation in these PAs, including the existing payments for environmental services system and improvements thereof as well as options for sustainable land management. We found that the three largest PAs in the SMC are still largely forested, and deforestation rates have decreased since 2000. Cases of forest conversion are located in specific zones and are related to agrarian and political conflicts as well as growing economic inequality and population numbers. These problems could cause an increase in forest loss in the near future. Payments for environmental services and access to carbon markets are identified as options to ensure forest permanence but still face problems. Challenges for the future are to integrate these incentive mechanisms with sustainable land management and a stronger involvement of land holders in conservation.


16.
- Capítulo de libro sin arbitraje
Assessing fragmentation and degradation of dryland forest ecosystems
Echeverría, Cristian (autor) ; Kitzberger, Thomas (autor) ; Rivera García, Raúl (autor) ; Manson, Robert H. (autor) ; Vaca Genuit, Raúl Abel (autor) ; Cristóbal, Luciana (autora) ; Machuca, Guillermo (autor) ; González, David (autor) ; Fuentes, Rodrigo (autor) ;
Disponible en línea
Contenido en: Principles and practice of forest landscape restoration : case studies from the drylands of Latin America / edited by A.C. Newton and N. Tejedor Gland, Switzerland : International Union for Conservation of Nature and Natural Resources, c2011 p. 65-102 ISBN:978-283-1713-40-3
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17.
- Capítulo de libro sin arbitraje
Assessing the current extent and recent loss of dryland forest ecosystems
Rey Benayas, José María (autor) ; Cristóbal, Luciana (autora) ; Kitzberger, Thomas (autor) ; Manson, Robert H. (autor) ; López Barrera, Fabiola (autora) ; Schulz, Jennifer (autora) ; Vaca Genuit, Raúl Abel (autor) ; Cayuela Delgado, Luis (autor) ; Rivera García, Raúl (autor) ; Malizia, Lucio Ricardo (autor) ; Golicher, Duncan John (autor) ; Echeverría, Cristian (autor) ; Del Castillo Sánchez, Rafael Felipe ; Salas, Javier (autor) ;
Disponible en línea
Contenido en: Principles and practice of forest landscape restoration : case studies from the drylands of Latin America / edited by A.C. Newton and N. Tejedor Gland, Switzerland : International Union for Conservation of Nature and Natural Resources, c2011 p. 23-63 ISBN:978-283-1713-40-3
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18.
- Capítulo de libro sin arbitraje
Evaluación de la extensión actual y pérdida reciente de los ecosistemas forestales en zonas secas
Rey Benayas, José María (autor) ; Cristóbal, Luciana (autora) ; Kitzberger, Thomas (autor) ; Manson, Robert H. (autor) ; López Barrera, Fabiola (autora) ; Schulz, Jennifer (autora) ; Vaca Genuit, Raúl Abel (autor) ; Cayuela Delgado, Luis (autor) ; Rivera García, Raúl (autor) ; Malizia, Lucio Ricardo (autor) ; Golicher, Duncan John (autor) ; Echeverría, Cristian (autor) ; Del Castillo Sánchez, Rafael Felipe ; Salas, Javier (autor) ;
Disponible en línea
Contenido en: Principios y práctica de la restauración del paisaje forestal: estudios de caso en las zonas secas de América Latina / editado por A. C. Newton y N. Tejedor ; Traductores: José M. Benayas y Marta Rueda Gland, Suiza : Unión Internacional para la Conservación de la Naturaleza y los Recursos Naturales : Fundación Internacional para la Restauración de Ecosistemas, c2011 p. 23-64 ISBN:978-2-8317-1394-6
Bibliotecas: Campeche , San Cristóbal
Cerrar
SIBE Campeche
31933-30 (Disponible)
Disponibles para prestamo: 1
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SIBE San Cristóbal
31933-20 (Disponible)
Disponibles para prestamo: 1
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19.
- Capítulo de libro sin arbitraje
Evaluación de la fragmentación y degradación de los ecosistemas forestales en zonas secas
Echeverría, Cristian (autor) ; Kitzberger, Thomas (autor) ; Rivera García, Raúl (autor) ; Manson, Robert H. (autor) ; Vaca Genuit, Raúl Abel (autor) ; Cristóbal, Luciana (autora) ; Machuca, Guillermo (autor) ; González, David (autor) ; Fuentes, Rodrigo (autor) ;
Disponible en línea
Contenido en: Principios y práctica de la restauración del paisaje forestal: estudios de caso en las zonas secas de América Latina / editado por A. C. Newton y N. Tejedor ; Traductores: José M. Benayas y Marta Rueda Gland, Suiza : Unión Internacional para la Conservación de la Naturaleza y los Recursos Naturales : Fundación Internacional para la Restauración de Ecosistemas, c2011 p. 65-103 ISBN:978-2-8317-1394-6
Bibliotecas: Campeche , San Cristóbal
Cerrar
SIBE Campeche
38499-30 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE San Cristóbal
38499-20 (Disponible)
Disponibles para prestamo: 1
PDF

20.
Artículo
Using climatically based random forests to downscale coarse-grained potential natural vegetation maps in tropical Mexico
Vaca Genuit, Raúl Abel ; Golicher, Duncan John (coaut.) ; Cayuela Delgado, Luis (coaut.) ;
Contenido en: Applied Vegetation Science Vol. 14, no. 3 (August 2011), p. 388–401 ISSN: 1402-2001
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
39125-20 (Disponible)
Disponibles para prestamo: 1
Resumen en: Inglés |
Resumen en inglés

Questions: Can the accuracy of coarse resolution potential vegetation maps be improved through downscaling to finer resolution climatic grids? Can output from random forests produce new insight into the climatic characteristics that are associated with the structural characteristics of the vegetation? Location: Southern Mexico. Methods: A potential vegetation map (National Atlas of Mexico) at a 1:4 000 000 scale, was downscaled to a 1 km2 grid resolution using climatically based random forests models. The resulting map was then evaluated against 256 inventory plots sampled at the transition between different vegetation types in Southern Mexico. Results: Downscaling increased accuracy up to 0.40, as measured by the Kappa Index of Agreement. Multivariate analysis of the results allowed the association between Rzedowski's classification and climatic variation to be explored. This confirmed that many of the structural aspects of the vegetation that are used by the Rzedowski classification are closely associated with climate, but it also revealed weaknesses in the underlying basis of this classification system. Conclusions: Rzedowski's scheme for vegetation classification may require further modification in order to be an effective tool for research into vegetation–climate relationships.