Variation in carbon storage among tree species : implications for the management of a small-scale carbon sink project

Despite growing evidence for an effect of species composition on carbon (C) storage and sequestration, few projects have examined the implications of such a relationship for forestry and agriculture-based climate change mitigation activities.. We examined evidence for a functional relationship between tree-species diversity and C storage in each land-use type, and explored how the use of particular tree species by community members could affect C storage. We found that managed forests in this landscape stored an average of 335 Mg C ha−1, traditional agroforests an average of 145 Mg C ha−1, and pastures an average of 46 Mg C ha−1 including all vegetation-based C stocks and soil C to 40 cm depth. We did not detect a relationship between diversity and C storage; however, the relative contributions of species to C storage per hectare in forests and agroforests were highly skewed and often were not proportional to species’ relative abundances. We conclude that protecting forests from conversion to pasture would have the greatest positive impact on C stocks, even though the forests are managed by community members for timber and non-timber forest products. However, because several of the tree species that contribute the most to C storage in forests were identified by community members as preferred timber species, we suggest that species-level management will be important to avoiding C-impoverishment through selective logging in these forests. Our data indicate that expanding agroforests into areas currently under pasture could sequester significant amounts of carbon while providing biodiversity and livelihood benefits that the most common reforestation systems in the region do not provide.

Bibliographic Details

Main Authors:	83179 Kirby, Kathryn R. McGill University, Montreal, Quebec, Canada, 106555 Potvin, Catherine (autor/a) McGill University, Montreal, Quebec, Canada : Smithsonian Tropical Research Institute, Balboa, Panama
Format:	Texto biblioteca
Language:	eng
Published:	Amsterdam Elsevier 2007
Subjects:	CARBONO, ALMACENAMIENTO, SECUESTRO DE CARBONO, ARBOLES, BIODIVERSIDAD, CARBONO ORGANICO DEL SUELO, MODELOS, ALOMETRIA, ECUACIONES ALOMETRICAS, MODELOS ALOMETRICOS, BIOMASA AEREA, BIOMASA ABAJO DEL SUELO, AGRICULTURA, UTILIZACION DE LA TIERRA, AGROFORESTERIA, SERVICIOS ECOSISTEMICOS, CARBON, STORAGE, TREES, BIODIVERSITY, MODELS, FORESTS, LAND USE, AGROFORESTRY,
Online Access:	https://www.sciencedirect.com/science/article/abs/pii/S0378112707002903
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