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Tropical mexico's recent land-use change : a region's contribution to the global carbon cycle

Tipo de material: Artículo impreso(a) y electrónico Artículo impreso(a) y electrónico Idioma: Inglés Tema(s) en español: Tema(s) en inglés: Clasificación:
  • AR/333.75137 T7
Recurso en línea: Formatos físicos adicionales disponibles:
  • Disponible en línea
 En: Ecological Applications volumen 10, número 5 (Octubre 2000), páginas 1426-1441Nota de acceso: Acceso en línea sin restricciones Resumen:
Inglés

We applied modeled biomass density estimates to changes in land use/land cover (LU/LC) statistics for the intensively impacted and highly fragmented landscape of tropical Mexico to estimate the flux of carbon (C) between terrestrial ecosystems and the atmosphere between 1977 and 1992. Biomass densities were assigned to hybrid LU/LC classes on vegetation maps produced by Mexican governmental organizations and, by differencing areas and biomass C pools, net C flux was calculated in the eight-state tropical region of southeast Mexico. These states, representing tropical Mexico, experienced a mean annual deforestation rate of nearly 559 000 ha/yr, or 1.9%, between 1977 and 1992. The total area of closed forests decreased by 26%, open/fragmented forests decreased by 31%, and agroecosystem areas increased by 64%. Total mean biomass densities ranged from a high of 265 Mg/ha in the Veracruz state tall/medium tropical evergreen forest class to a low of 12 Mg/ha in the cultivated land class (several states). We estimate that a total of 280 Tg C were released from the terrestrial biosphere during the 15-yr period covered by our study, equal to nearly 20% of the region's 1977 biomass C pool. The study region, while comprising just 24% of Mexico's surface area, contributed 36% of the net national C emissions from LU/LC change.

Número de sistema: 27063
Lista(s) en las que aparece este ítem: Ganadería, agroforestería, silvopastoril y cambio climático
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Tipo de ítem Biblioteca actual Colección Signatura topográfica Info Vol Estado Código de barras
Artículos Biblioteca Electrónica Recursos en línea (RE) ECOSUR Recurso digital ECO400270636393
Artículos Biblioteca San Cristóbal Artículos Hemeroteca (AR HM) ECOSUR 001 Disponible 631110CB3370
Artículos Biblioteca San Cristóbal Artículos (AR) ECOSUR AR 333.75137 T7 003 Disponible ECO010018795
Artículos Biblioteca Villahermosa Artículos (AR) ECOSUR AR 333.75137 T7 002 Disponible ECO050002085

Acceso en línea sin restricciones

We applied modeled biomass density estimates to changes in land use/land cover (LU/LC) statistics for the intensively impacted and highly fragmented landscape of tropical Mexico to estimate the flux of carbon (C) between terrestrial ecosystems and the atmosphere between 1977 and 1992. Biomass densities were assigned to hybrid LU/LC classes on vegetation maps produced by Mexican governmental organizations and, by differencing areas and biomass C pools, net C flux was calculated in the eight-state tropical region of southeast Mexico. These states, representing tropical Mexico, experienced a mean annual deforestation rate of nearly 559 000 ha/yr, or 1.9%, between 1977 and 1992. The total area of closed forests decreased by 26%, open/fragmented forests decreased by 31%, and agroecosystem areas increased by 64%. Total mean biomass densities ranged from a high of 265 Mg/ha in the Veracruz state tall/medium tropical evergreen forest class to a low of 12 Mg/ha in the cultivated land class (several states). We estimate that a total of 280 Tg C were released from the terrestrial biosphere during the 15-yr period covered by our study, equal to nearly 20% of the region's 1977 biomass C pool. The study region, while comprising just 24% of Mexico's surface area, contributed 36% of the net national C emissions from LU/LC change. Inglés

Disponible en línea

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