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Carbon stocks and accumulation rates in tropical secondary forests at the scale of community, landscape and forest type

Orihuela Belmonte, Dolores Edith [autora] | De Jong, Bernardus Hendricus Jozeph [autor] | Mendoza Vega, Jorge [autor] | Van Der Wal, Hans [autor] | Paz Pellat, Fernando [autor] | Soto Pinto, Lorena, 1958- [autora] | Flamenco Sandoval, Alejandro Fidel [autor].
Tipo de material: Artículo
 impreso(a) 
 Artículo impreso(a) Tipo de contenido: Texto Tipo de medio: Computadora Tipo de portador: Recurso en líneaTema(s): Carbono | Biomasa forestal | Uso de la tierra | Bosque secundario | Bosques tropicalesDescriptor(es) geográficos: Reserva de la Biosfera Selva El Ocote (Chiapas, México) Nota de acceso: Disponible para usuarios de ECOSUR con su clave de acceso En: Agriculture, Ecosystems & Environment. volumen 171 (May 2013), páginas 72-84. --ISSN: 0167-8809Número de sistema: 35664Resumen:
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Rapid increases of secondary forest areas in the tropics make understanding of their carbon dynamics critical to estimate net CO2 emissions and uptake. This understanding is needed for performance based mechanisms that aim to halt global warming (REDD+). Despite the importance of secondary forests to global C cycling, the impacts of recovering secondary vegetation on C dynamics are poorly understood. We present carbon stocks and accumulation rates in biomass and soil pools, using as a basis of analysis 87 sampling plots established along a secondary forest chronosequence derived from shifting cultivation. We test the influence of age, land-use intensity (prior land-use history) and two site quality indices on the size of the C stocks and C accumulation rates. Biomass and Total C pools were positively correlated with age and negatively with LU intensity, whereas C accumulation rates had opposite signs for both parameters. Soil C did not show any variation along the age gradient, but C in the upper 20 cm was positively correlated to both site quality indices. The LU-intensity influenced the tree C stock in the younger plots. We propose a nested approach in which detailed studies can be up-scaled to landscape and regional estimates of carbon pools in forest fallow and undisturbed forests and carbon accumulation rates in forest fallow.

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Rapid increases of secondary forest areas in the tropics make understanding of their carbon dynamics critical to estimate net CO2 emissions and uptake. This understanding is needed for performance based mechanisms that aim to halt global warming (REDD+). Despite the importance of secondary forests to global C cycling, the impacts of recovering secondary vegetation on C dynamics are poorly understood. We present carbon stocks and accumulation rates in biomass and soil pools, using as a basis of analysis 87 sampling plots established along a secondary forest chronosequence derived from shifting cultivation. We test the influence of age, land-use intensity (prior land-use history) and two site quality indices on the size of the C stocks and C accumulation rates. Biomass and Total C pools were positively correlated with age and negatively with LU intensity, whereas C accumulation rates had opposite signs for both parameters. Soil C did not show any variation along the age gradient, but C in the upper 20 cm was positively correlated to both site quality indices. The LU-intensity influenced the tree C stock in the younger plots. We propose a nested approach in which detailed studies can be up-scaled to landscape and regional estimates of carbon pools in forest fallow and undisturbed forests and carbon accumulation rates in forest fallow. eng

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