Términos relacionados

213 resultados encontrados para: AUTOR: Ochoa Gaona, Susana
  • «
  • 1 de 22
  • »
1.
Libro
Primera reunión de curadores: de las colecciones biológicas de El Colegio de la Frontera Sur / Rogel Villanueva Gutiérrez, ...[et al.]
Villanueva Gutiérrez, Rogel ; Sánchez Sánchez, Odilón Manuel ; Ochoa Gaona, Susana ; Schmitter Soto, Juan Jacobo ; Pozo, Carmen ; Ruiz Montoya, Lorena (1964-) ; Escobedo Cabrera, José Enrique ;
Chetumal, Quintana Roo, México : El Colegio de la Frontera Sur , s.f.
Clasificación: ACAD/574.074972 / V5
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
SEA000240 (Disponible) , ECO010016773 (Disponible)
Disponibles para prestamo: 2

2.
- Artículo con arbitraje
PDF PDF
Resumen en: Inglés |
Resumen en inglés

Assessing landscape connectivity allows us to identify critical areas that impede or facilitate the movement of organisms and their genes and to plan their conservation and management. In this article, we assessed landscape connectivity and ecological condition of the habitat patches of a highly biodiverse region in Chiapas, Mexico. We employed data of three cracid species with different characteristics in habitat use and mobility. The habitat map of each species was derived from a spatial intersection of the models of potential distribution and a high-resolution map of current land cover and land use. The ecological condition of vegetation types was evaluated using 75 field plots. Structure of landscape was estimated by fragmentation metrics, while functional connectivity was assessed using spatially explicit graph analysis. The extent of suitable habitat for Oreophasis derbianus, Penelopina nigra, and Penelope purpurascens correspond to 25%, 46%, and 55% of the study area (5,185.6 km2), respectively. Although the pine-oak forests were the most fragmented vegetation type, habitats of the three species were well connected, and only 4% to 9% of the fragments located on the periphery of the corridor had low connectivity. Landscape connectivity depends mainly on land uses with an intermediate and lower ecological condition (secondary forests and coffee agroforestry systems). Therefore, we suggest that in addition to promoting the improvement in connectivity in fragmented forests, conservation efforts should be aimed at preventing the conversion of mature forests into agricultural uses and maintaining agroforestry systems.


3.
Libro
PDF PDF PDF

4.
- Artículo con arbitraje
Biodiversity recovery of Neotropical secondary forests
Rozendaal, Danaë M. A. ; Bongers, Frans (coaut.) ; Aide, T. Mitchell (coaut.) ; Álvarez Dávila, Esteban (coaut.) ; Ascarrunz, Nataly (coaut.) ; Balvanera, Patricia (coaut.) ; Becknell, Justin M. (coaut.) ; Bentos, Tony V. (coaut.) ; Brancalion, Pedro H. S. (coaut.) ; Cabral, George A. L. (coaut.) ; Calvo Rodríguez, Sofía (coaut.) ; Chave, Jerome (coaut.) ; César, Ricardo G. (coaut.) ; Chazdon, Robin L. (coaut.) ; Condit, Richard (coaut.) ; Dallinga, Jorn S. (coaut.) ; Almeida Cortez, Jarcilene Silva (coaut.) ; De Jong, Bernardus Hendricus Jozeph (coaut.) ; Oliveira, Alexandre A. de (coaut.) ; Denslow, Julie S. (coaut.) ; Dent, Daisy H. (coaut.) ; DeWalt, Saara J. (coaut.) ; Dupuy, Juan Manuel (coaut.) ; Durán, Sandra M. (coaut.) ; Dutrieux, Loïc P. (coaut.) ; Espírito Santo, Mario M. (coaut.) ; Fandino, María C. (coaut.) ; Fernandes, G. Wilson (coaut.) ; Finegan, Bryan (coaut.) ; García, Hernando (coaut.) ; González Valdivia, Noel Antonio (coaut.) ; Granda Moser, Vanessa (coaut.) ; Hall, Jefferson S. (coaut.) ; Hernández Stefanoni, José Luis (coaut.) ; Hubbell, Stephen (coaut.) ; Jakovac, Catarina C. (coaut.) ; Hernández, Alma Johanna (coaut.) ; Junqueira, André B. (coaut.) ; Kennard, Deborah (coaut.) ; Larpin, Denis (coaut.) ; Letcher, Susan G. (coaut.) ; Licona, Juan Carlos (coaut.) ; Lebrija Trejos, Edwin (coaut.) ; Marín Spiotta, Erika (coaut.) ; Martínez Ramos, Miguel (coaut.) ; Massoca, Paulo E. S. (coaut.) ; Meave, Jorge A. (coaut.) ; Mesquita, Rita C. G. (coaut.) ; Mora, Francisco (coaut.) ; Müller, Sandra C. (coaut.) ; Muñoz, Rodrigo (coaut.) ; Nolasco de Oliveira Neto, Silvio (coaut.) ; Norden, Natalia (coaut.) ; Nunes, Yule R. F. (coaut.) ; Ochoa Gaona, Susana (coaut.) ; Ortiz Malavassi, Edgar (coaut.) ; Ostertag, Rebecca (coaut.) ; Peña Claros, Marielos (coaut.) ; Pérez García, Eduardo A. (coaut.) ; Piotto, Daniel (coaut.) ; Powers, Jennifer S. (coaut.) ; Aguilar Cano, José (coaut.) ; Rodríguez Buritica, Susana (coaut.) ; Rodríguez Velázquez, Jorge (coaut.) ; Romero Romero, Marco Antonio (coaut.) ; Ruíz, Jorge (coaut.) ; Sánchez Azofeifa, Gerardo Arturo (coaut.) ; Silva de Almeida, Arlete (coaut.) ; Silver, Whendee L. (coaut.) ; Schwartz, Naomi B. (coaut.) ; Thomas, William Wayt (coaut.) ; Toledo, Marisol (coaut.) ; Uriarte, Maria (coaut.) ; Valadares de Sá Sampaio, Everardo (coaut.) ; van Breugel, Michiel (coaut.) ; Van Der Wal, Hans (coaut.) ; Martins, Sebastião Venâncio (coaut.) ; Veloso, María D. M. (coaut.) ; Vester, Hans F. M. (coaut.) ; Vicentini, Alberto (coaut.) ; Vieira, Ima C. G. (coaut.) ; Villa, Pedro (coaut.) ; Williamson, G. Bruce (coaut.) ; Zanini, Kátia J. (coaut.) ; Zimmerman, Jess (coaut.) ; Poorter, Lourens (coaut.) ;
Contenido en: Science Advances Vol. 5, no. 3, eaau3114 (March 2019), p. 1-10 ISSN: 2375-2548
PDF PDF
Resumen en: Inglés |
Resumen en inglés

Old-growth tropical forests harbor an immense diversity of tree species but are rapidly being cleared, while secondary forests that regrow on abandoned agricultural lands increase in extent. We assess how tree species richness and composition recover during secondary succession across gradients in environmental conditions and anthropogenic disturbance in an unprecedented multisite analysis for the Neotropics. Secondary forests recover remarkably fast in species richness but slowly in species composition. Secondary forests take a median time of five decades to recover the species richness of old-growth forest (80% recovery after 20 years) based on rarefaction analysis. Full recovery of species composition takes centuries (only 34% recovery after 20 years). A dual strategy that maintains both old-growth forests and species-rich secondary forests is therefore crucial for biodiversity conservation in human-modified tropical landscapes.


5.
- Artículo con arbitraje
PDF
Resumen en: Inglés |
Resumen en inglés

There is increasing recognition that ecosystems and their services need to be managed at landscape scale and greater. The development of landscape-scale conservation strategies need to incorporate information from multiple sources. In this study, we combine various research tools to link landscape patterns with production units and systems in the Usumacinta River Basin, and inform the discussion of key questions around decisionmaking related to conservation action and policy in Southern Mexico. A typology based on policy-relevant farmer characteristics (land tenure, farm size, source of income, farming system) differentiated between farmers (traditional vs. cattle ranching) with different motivations that determine how management affects landscape configuration. Five main types of traditional farming systems were identified that combine different forms of land use and vary in their degree of land intensification. Major fragmentation and decrease in connectivity coincided spatially with floodplains dominated by large-scale commercial farms that specialize in livestock production.

Traditional practices within large units with low-sloped high quality land were also seen to be intensive; however the presence of trees was notable throughout these units. Policies that promote livestock farming are among the principle causes motivating deforestation. Land intensification by traditional farmers decreased as the landscape became increasingly rugged. Traditional farmers are the focus of initiatives developed by the Biological Corridor project which seeks to increase forest cover and landscape connectivity. These initiatives have shown high levels of rural participation (10,010 farmers benefited from 27,778 projects involving 95,374 ha of land) and acceptance (producers carried out more than one project and several types of projects during the first eight years of work). Strong action is still required to take on the segment of large-scale ranchers. Changes in the structure of land tenure over the past decade are highlighted that could have a profound impact on conservation policies and programs.


6.
- Artículo con arbitraje
*Solicítelo con su bibliotecario/a
Land cover changes and fragmentation in mountain neotropical ecosystems of Oaxaca, Mexico under community forest management
Navarro Cerrillo, Rafael María ; Esteves Vieira, Dennis Junio (coaut.) ; Ochoa Gaona, Susana (coaut.) ; De Jong, Bernardus Hendricus Jozeph (coaut.) ; Delgado Serrano, María del Mar (coaut.) ;
Contenido en: Journal of Forestry Research Vol. 30, no. 1 (February 2019), p. 143-155 ISSN: 1993-0607
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

Changes in land cover have a direct impact on forest ecosystem goods and services. In this study, changes in land cover in Sierra de Juarez–Oaxaca ecosystems were estimated using a consistent processing of Landsat images and OBIA methodology. Additionally, landscape analyses using FRAGSTAT were conducted. In 2014, Sierra de Juarez–Oaxaca was covered by approximately 84% of forests, mainly pine-oak and cloud forests. After extensive deforestation until 2001, this trend was reversed and the forest cover surface area in 2014 was slightly higher than in 1979. The comparison of the landscape structure of the forested and agricultural lands suggests an increase in habitat heterogeneity. However, interspersion and juxtaposition indices, showing the patch shape by patch area and perimeter, were similar throughout the study period (1979–2014). Social and economic drivers can explain this situation: namely, community organization, forest enterprises, payment for ecosystem services programs, and changes of agricultural activity. Communities in the Sierra of Oaxaca have reforested degraded lands, created community forest enterprises, and preserved the forest under conservation schemes like those proposed by the Mexican payment for ecosystem services programs. However, their sustainable management faces internal challenges and has become highly dependent on political and institutional decisions beyond their control.


7.
- Artículo con arbitraje
PDF
Resumen en: Español | Inglés |
Resumen en español

Proponemos una estrategia de tres etapas para evaluar el impacto de la mecanización de la agricultura en la valoración sociocultural de paisajes con agricultura tradicional de milpa. El método consistió en la aplicación de entrevistas semi-estructuradas a 60 pobladores de dos comunidades mayas con diferente historia de mecanización de la agricultura. En cada entrevista se recopiló información general de los encuestados, además de las tres técnicas de valoración de servicios ecosistémicos: listado libre, una matriz de evaluación y la ordenación de preferencias de unidades del paisaje. Los resultados muestran que la valoración sociocultural de los servicios ecosistémicos en ambas comunidades es muy similar. Las comunidades comparten el 58% de los servicios ecosistémicos listados. Ambas comunidades reconocen el carácter multifuncional del bosque; sin embargo, en la priorización de unidades del paisaje destacan las unidades que proveen de alimentos: las milpas en la comunidad tradicional y las unidades de agricultura mecanizada en la comunidad modernizada. Esta diferencia se explica por el ingreso económico asociado a la venta de excedentes en la agricultura mecanizada. En conclusión, la modernización agrícola no tuvo un impacto importante en la valoración sociocultural de servicios ecosistémicos, pero sí en la jerarquía de las unidades del paisaje. Además, se reconoce la relevancia local de cada unidad del paisaje en la provisión de servicios relevantes para el modo de vida de los mayas, lo que explica la persistencia de estos paisajes heterogéneos y multifuncionales.

Resumen en inglés

Agricultural modernization and socio-cultural valuation of ecosystem services in Mayan landscapes of southeastern Mexico. The impact of modernization on the sociocultural valuation of ecosystem services in rural landscapes has been little studied. We propose a three-step strategy to evaluate the impact of agricultural mechanization on the sociocultural valuation of landscapes with traditional milpa agriculture. The method entailed the application of semi-structured interviews to 60 settlers from two Mayan communities with different agriculture’s mechanization history. Each interview included general information collection of the respondents as well as three ecosystem services valuation techniques: a free listing, an assessment matrix, and the ranking of the landscape units. These instruments were applied to 60 participants in two Mayan communities differentiated by 30 years from the beginning of agriculture mechanization. The results highlight a similar valuation of ecosystem services in both communities. Communities share 58% of the landscape services listed. Participants in both communities recognize the multifunctional character of the forest. Nevertheless, greater importance was assigned to food provisioning areas: milpa in the traditional community and to mechanized lands in the modernized community. This most significant difference found between communities is explained by the economic income associated with the sale of surpluses in mechanized agriculture. In conclusion, agricultural modernization has not had an important impact on the sociocultural valuation of ecosystem services, but in the importance of the landscape units. In addition, we capture the local recognition of each unit on the provision services relevant for the Mayan way of life, which explains the persistence of these heterogeneous and multifunctional landscapes.


8.
- Artículo con arbitraje
Rebrote arbóreo en la regeneración del bosque tropical de Calakmul, Campeche, México
Haas Ek, María Alejandra ; González Valdivia, Noel Antonio (coaut.) ; De Jong, Bernardus Hendricus Jozeph (coaut.) ; Ochoa Gaona, Susana (coaut.) ; Aryal, Deb Raj (coaut.) ;
Contenido en: Revista de Biologia Tropical Vol. 67, no. 1 (March 2019), p. 164-181 ISSN: 0034-7744
PDF PDF
Resumen en: Español | Inglés |
Resumen en español

Los estudios detallados para comprender como los bosques neotropicales se reestablecen en el tiempo, a través de la sucesión secundaria aún resultan necesarios. Entre los mecanismos de regeneración que actúan en los bosques tropicales, el rebrote de árboles predomina en especies leñosas, con la ventaja de reiniciar el crecimiento de raíces establecidas, que permiten restituir el dosel forestal. El objetivo de este estudio fue identificar y cuantificar las especies arbóreas con capacidad de rebrote en distintas etapas de la sucesión secundaria (barbecho) después del sistema agrícola tradicional de milpa, comparadas con las comunidades del bosque tropical predominante en la Reserva de la Biósfera de Calakmul, y cómo influyen estas especies en la recuperación de la composición de este ecosistema. Se calculó el porcentaje de especies con y sin rebrote para cada etapa sucesional. Se registraron 13 972 individuos (32 % con rebrote y 68 % sin rebrote) y 168 especies (79 % con rebrote y 21 % sin rebrote), el porcentaje de individuos con rebrote va disminuyendo conforme avanza la edad de la sucesión. El número de individuos con rebrote y la composición de especies fueron significativamente diferentes entre etapas. Se puede concluir que la mayoría de especies arbóreas del bosque en Calakmul, presentan la capacidad de rebrotar, lo cual tiene influencia en el rápido proceso sucesional del bosque después de la roza-tumba y quema, restituyendo la cobertura y estructura forestal, así como la composición de las especies originales.

Resumen en inglés

Detailed studies to understand recovering of Neotropical forests over time, through secondary succession, are still necessaries. Between acting mechanisms of regeneration in the tropical forests, the arboreal resprout predominates in woody species, with the advantage of restart the growth from still rooting plants, allowing the restoring of forest canopy. The study aim was to identify and quantify the tree species with resprouting capacity in different stages of secondary succession (tree-fallow) after the traditional milpa agricultural system, compared with tropical forest communities in the Calakmul Biosphere Reserve and, enlightening how these species influences the recovery of the composition of this ecosystem. Was calculated the proportions of species with or without resprouting by successional stage. There were 13972 individuals (32 % resprouting and 68 % not resprouting) and 168 species (79 % resprouting and 21 % not resprouting), the percentage of individuals regrowing decreases as the successional stage progresses. The number of individuals resprouting and species composition were significantly different between successional stages. In conclusion, mostly arboreal species in the region of Calakmul, can regrow, which influences the successional development of the forest after slash-and-burn, helping to restore the coverage, structure, as well as species composition original.


9.
- Capítulo de libro
Selva alta perennifolia
Ochoa Gaona, Susana ; González Valdivia, Noel Antonio (coaut.) ; Pérez Hernández, Isidra (coaut.) ;
Contenido en: La biodiversidad en Tabasco. Estudio de estado Distrito Federal, México : Comisión Nacional para el Conocimiento y Uso de la Biodiversidad, 2019 Vol. II, página 41-51 ISBN:9786078570218 (Vol. II)
PDF

10.
- Capítulo de libro
La selva inundable de canacoíte (Bravaisia integerrima)
Ochoa Gaona, Susana ; Maldonado Sánchez, Emerson Almar (coaut.) ;
Contenido en: La biodiversidad en Tabasco. Estudio de estado Distrito Federal, México : Comisión Nacional para el Conocimiento y Uso de la Biodiversidad, 2019 Vol. II, página 109-116 ISBN:9786078570218 (Vol. II)
PDF