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17 resultados encontrados para: AUTOR: Turner II, Billie Lee
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Resumen en: Inglés |
Resumen en inglés

Land system science axiomatically addresses social–environmental systems by integrating the dynamics of land uses (social) and land covers (environment), invariably including the use of remote sensing data and often, spatially explicit models of land change. This kind of research is illustrated through the Southern Yucatán Peninsular Region project (1997–2008) aimed at understanding, predicting, and projecting spatially explicit land change in a region with juxtaposed land uses-agriculture and a biosphere reserve. The successes of the project, its contributions to contemporary land system science, and the organizational mechanisms that fostered the research are identified as well as various corrections, which if applied, may have refined and extended the project's goals. Overall, the project demonstrates the kind of integrated research required to advance understanding of a social-environment system and the team-based methods used in the process.


Resumen en: Inglés |
Resumen en inglés

Land system science axiomatically addresses social– environmental systems by integrating the dynamics of land uses (social) and land covers (environment), invariably including the use of remote sensing data and often, spatially explicit models of land change. This kind of research is illustrated through the Southern Yucata´ n Peninsular Region project (1997–2008) aimed at understanding, predicting, and projecting spatially explicit land change in a region with juxtaposed land uses-agriculture and a biosphere reserve. The successes of the project, its contributions to contemporary land system science, and the organizational mechanisms that fostered the research are identified as well as various corrections, which if applied, may have refined and extended the project’s goals. Overall, the project demonstrates the kind of integrated research required to advance understanding of a social-environment system and the team-based methods used in the process.


3.
- Artículo con arbitraje
Resumen en: Inglés |
Resumen en inglés

This research examines the spatio-temporal trends in Advanced Very High Resolution Radiometer (AVHRR) Global Inventory Modelling and Mapping Studies (GIMMS) normalized difference vegetation index (NDVI) time series to ascribe land use change and precipitation to observed changes in land cover from 1982 to 2007 in the Mexican Yucatán Peninsula, using seasonal trend analysis (STA). In addition to discrete land cover transitions across the study region, patterns of agricultural intensification, urban expansion and afforestation in protected areas have enacted changes to the seasonal patterns of apparent greenness observed through STA greenness parameters. The results indicate that the seasonal variation in NDVI can be used to distinguish among different land cover transitions, and the primary differences among these transitions were in changes in overall greenness, peak annual greenness and the timing of the growing season. Associations between greenness trends and precipitation were weak, indicating a human-dominated system for the 26 years examined. Changes in the states of Campeche, Quintana Roo and Yucatán appear to be associated with pasture cultivation, urban expansion-extensive cultivation and urban expansion-intensive cultivation, respectively.


4.
Capítulo de libro
*En proceso técnico. Solicítelo con el bibliotecario(a) de SIBE-San Cristóbal
Integrated analysis of ecosystem interactions with land-use change:: The southern Yucatán peninsular region
Lawrence, Deborah ; Vester, Henricus F. M. (coaut.) ; Perez Salicrup, D. (coaut.) ; Eastman, J. Ronald (coaut.) ; Turner II, Billie Lee (coaut.) ; Geoghegan, Jacqueline (coaut.) ;
Contenido en: Ecosystem interactions with land use change. Geophysical Monograph Series 153 / R. DeFries, G. Asner, R. Houghton, (eds.) Washington DC., USA. : American Geophysical Union, 2004 p. 277-292
Nota: En proceso técnico. Solicítelo con el bibliotecario(a) de SIBE-San Cristóbal
Resumen en: Inglés |
Resumen en inglés

The southern Yucatán peninsular region is a seasonal tropical forest biome that experiences drought, hurricane, and agricultural disturbance. Substantial agricultural expansion over the past 50 years has opened and fragmented much of the forest surrounding the Calakmul Biosphere Reserve, posing a series of threats to the coupled human-environment systems. These threats are traced in a conceptual model borrowed from vulnerability studies and detailed in regard to ecosystem responses, including forest structure and composition, aboveground biomass, soil nutrients, balance in species and biotic diversity, and invasive species. The land-use and land-cover changes underway pose trade-offs in ecosystem services and raise several scalar issues important to deforestation studies


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

The southern Yucatán contains the largest expanse of seasonal tropical forests remaining in Mexico, forming an ecocline between the drier north of the peninsula and the humid Petén, Guatemala. The Calakmul Biosphere Reserve resides in the center of this region as part of the Mesoamerican Biological Corridor. The reserve’s functions are examined in regard to land changes throughout the region, generated over the last 40 years by increasing settlement and the expansion and intensification of agriculture. These changes are documented from 1987/1988 to 2000, and their implications regarding the capacity of the reserve to protect the ecocline, forest habitats, and butterfly diversity are addressed. The results indicate that the current landscape matrix serves the biotic diversity of the reserve, with several looming caveats involving the loss of humid forests and the interruption of biota flow across the ecocline, and the amount and proximity of older forest patches beyond the reserve. The highly dynamic land cover changes underway in this economic frontier warrant an adaptive management approach that monitors the major changes underway in mature forest types, while the paucity of systematic ecological and environment–development studies is rectified in order to inform policy and practice.


6.
Libro
Integrated land-change science and tropical deforestation in the Southern Yucatán: final frontiers / edited by B. L. Turner II, Jacqueline Geoghegan and David R. Foster
Turner II, Billie Lee (editor) ; Geoghegan, Jacqueline (editora) ; Foster, David R. (editor) ;
Oxford, England, United Kingdom : Oxford University Press , 2004
Clasificación: Y/333.75137 / I5
Bibliotecas: Campeche , Chetumal , San Cristóbal
Cerrar
SIBE Campeche
ECO040002406 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Chetumal
ECO030000902 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE San Cristóbal
ECO010000042 (Disponible)
Disponibles para prestamo: 1
Índice | Resumen en: Inglés |
Resumen en inglés

This highly topical study of tropical deforestation in Mexico reports on the first phase of the Land-Cover and Land-Use Change in the Southern Yucatan Peninsular Region Project (LCLUC-SYPR): a large, multi-institutional, and team-based study designed to understand and project land changes in a development frontier that pits the rapidly growing needs of smallholder farmers to cut down forests for cultivation against federally sponsored initiatives committed to various international programmes of forest preservation and complementary economic programmes. The SYPR project is a response to inderdisciplinary defined research themes deemed critical to global environmental change and complementary international research agendas (e.g. environment and development, ecosystem assessment, biotic diversity). Pivotal among these agendas are those posed by the Land-Use/Cover Change (LUCC) effort of the International Geosphere-Biosphere Programme and the International Human Dimensions of Global Environmental Change Programme as it is linked through such US sponsors as the National Aeronautics and Space Administration (NASA) and the National Science Foundation (NSF). The themes (i.e. questions and subjects) posed by these programmes and organization are 'integrated' or 'synthesis' in kind, meaning that they rest within the intersection of formal disciplines and are intended to fit into a larger, systems framework about human-environment relationships and the structure and function of the biosphere. The editors of this volume, as most of its contributors, come from the disciplines of geography, ecology, and economics. The lead editor, the geographer B. L. Turner II, has spent most of his career in pursuit of understanding different aspects of tropical deforestation and agriculture.

Índice

1. Introduction Three Frontiers of the Southern Yucatan Peninsular Region and SYPR Project
I: Human-Environment Relationships, 1000 BC - AD 1900
2. The Long View: Human-Environment Relationships 1000 BC - AD 1900
3. Forest Extraction to Theme Parks: The Modern History of Land Change
II: Land-Cover Characteristics and Change
4. Forest Types and their Implications
5. Recovery of Nutrient Cycling and Ecosystem Properties following Swidden Cultivation: Regional and Stand-Level Constraints
6. Land Cover and Land Use: Classification and Change Analysis
III: Agents and Institutions of Land Change: Household Economy and Cultivation
7. Institutions, Organizations, and Policy Affecting Land Change: Complexity Within and Beyond the Ejido
8. The Ejido Household: The Current Agent of Change
9. Subsistence Sustained: Swidden or Milpa Cultivation
10. Jalapeno Pepper Cultivation: Emergent Commercial Land Use
11. The Semi-Market and Semi-Subsistence Household: The Evidence and Test of Smallholder Behavior
IV: Spatial Modeling of Land Change: Empirical Approaches in Data-Sparse Environments
12. Spatially Explicit, Statistical Land-Change Models in Data-Sparse Conditions
13. The SYPR Integrative Assessment Model: Complexity in Development
Retrospective: The Three Frontiers Revisited
Glossary and Acronyms
Index


Índice | Resumen en: Inglés |
Resumen en inglés

This volume is a synthesis of the NASA funded work under the Land-Cover and Land-Use Change Program. Hundreds of scientists have worked for the past eight years to understand one of the most important forces that is changing our planet-human impacts on land cover, that is land use. Its contributions span the natural and the social sciences, and apply state-of-the-art techniques for understanding the earth: satellite remote sensing, geographic information systems, modeling, and advanced computing. It brings together detailed case studies, regional analyses, and globally scaled mapping efforts. This is the most organized effort made to understand the dominant force that has been responsible for changing the Earth’s biosphere. Audience: This publication will be of interest to students, scientists, and policy makers.

Índice

LCLUC Concepts; National and international programs
The development of the international land-use and land-cover change (LUCC) research program and its links to NASA’s land-cover and land-use change (LCLUC) initiative
The NASA land cover and land use change program
Meeting the goals of GOFC
Observations of LCLUC: case studies
Forest change and human driving forces in central America
Pattern to process in the Amazon region
Towards an operational forest monitoring system for central Africa
Land use and land cover change in southeast Asia
Northern Eurasia
Land cover disturbances and feedbacks to the climate system in Canada and Alaska
Mapping desertification in southern Africa
Woodland expansion in US grasslands
Arid land agriculture in northeastern Syria
Changes in land cover and land use in the pearl river delta, China
Cross cutting themes, impacts and consequences
The effects of land use and management on the global carbon cycle
Land use and hydrology
Land use change and biodiversity
Land use and climate
Urbanization
Land use and fires
Land cover / use and population
Methodological issues, modeling
Trends in land cover mapping and monitoring
Linking pixels and people
Modeling land use and land cover change
Synthesis and lessons: biophysical change and beyond
Land-Use and land-cover change pathways and impacts
Integrated land-change science and its relevance to the human sciences
Research directions in land-cover and land-use change


8.
- Capítulo de libro con arbitraje
*Solicítelo con su bibliotecario/a
Subsistence sustained: swidden or milpa cultivation
Klepeis, Peter (autor) ; Vance, Colin James (autor) ; Keys, Eric (autor) ; Macario Mendoza, Pedro A. (autor) ; Turner II, Billie Lee (autor) ;
Clasificación: AR/633.15097264 / S9
Contenido en: Integrated land-change science and tropical deforestation in the southern Yucatán: final frontiers / edited by B. L. Turner II, Jacqueline Geoghegan and David R. Foster Oxford, England, United Kingdom : Oxford University Press, 2004 páginas 189-206 ISBN:0-19-924530-4 :: 978-0-19-924530-7
Bibliotecas: Campeche , Chetumal , San Cristóbal
Cerrar
SIBE Campeche
ECO040006388 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Chetumal
51927-30 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE San Cristóbal
51927-20 (Disponible)
Disponibles para prestamo: 1
Nota: Solicítelo con su bibliotecario/a

9.
Artículo
Deforestation in the southern Yucatán Peninsular region: an integrative approach
Turner II, Billie Lee ; Cortina Villar, Héctor Sergio (coaut.) (1960-) ; Foster, David (coaut.) ; Geoghegan, Jacqueline (coaut.) ;
Clasificación: AR/333.75137 / D4
Contenido en: Forest Ecology and Management Vol. 154, no. 3 (December 2001), p. 353-370 ISSN: 0378-1127
Bibliotecas: Campeche , San Cristóbal
Cerrar
SIBE Campeche
ECO040001538 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE San Cristóbal
ECO010012516 (Disponible) , ECO010003666 (Disponible)
Disponibles para prestamo: 2
Resumen en: Inglés |
Resumen en inglés

The tensions between development and preservation of tropical forests heighten the need for integrated assessments of deforestation processes and for models that address the fine-tuned location of change. As Mexico's last tropical forest frontier, the southern Yucatan peninsular region witnesses these tensions, giving rise to a hot spot of tropical deforestation. These forests register the imprint of ancient Maya uses and selective logging in the recent past, but significant modem conversion of them for agriculture began in the 1960s. Subsequently, as much as 10% of the region's forests have been disturbed anthropogenically. The precise rates of conversion and length of successional growth in both upland and wetland forests are tied to policy and political economic conditions.

Pressures on upland forests are exacerbated by the development of infrastructure for El Mundo Maya, an archaeological and ecological activity predicated on forest maintenance, and by increased subsistence and market cultivation, including lands on the edge of Mexico's largest tropical forest biosphere reserve. In this complex setting, the southern Yucatán peninsular region project seeks to unite research in the ecological, social, and remote sensing sciences to provide a firm understanding of the dynamics of deforestation and to work towards spatially explicit assessments and models that can be used to monitor and project forest change under different assumptions.


10.
Artículo
Integrated land history and global change science: the example of the Southern Yucatán Peninsular Region project
Klepeis, Peter ; Turner II, Billie Lee (coaut.) ;
Clasificación: AR Y/972.65 / K5
Contenido en: Land Use Policy No. 18 (2001), p. 27-39 ISSN: 0264-8377
Bibliotecas: Campeche
Cerrar
SIBE Campeche
ECO040002050 (Disponible)
Disponibles para prestamo: 1