INVESTIGADORES
PIÑEIRO Gervasio
congresos y reuniones científicas
Título:
Carbon cycling in tree plantations of temperate and subtropical South America
Autor/es:
JOBBAGY, E.G.; PIÑEIRO, G; JACKSON, ROBERT B.; BERTHRONG, SEAN T.; ECLESIA, PAOLA; NOSETTO, MARCELO
Lugar:
Buenos Aires
Reunión:
Congreso; World Forestry Confress, IIASA side event; 2009
Institución organizadora:
IIASA, International Institute for Applied Systems Analysis
Resumen:
Tree plantations have expanded over several foci of South America, stimulated by high financial returns and, in some cases, public subsidies. Under most contexts these plantations display higher C uptake (i.e. net primary productivity rates) than the vegetation that they replace, with the exception of natural temperate and humid forests. Afforestation on grassland and pastures involved aboveground biomass C accreation rates that range from 5-15 Tn/Ha.yr. In the same plantations, soil organic C (SOC) stocks follow more variable trends, increasing slightly towards drier climates and in older tree plantations, but declining in humid climates and during the first 2-3 decades after planting. Tree plantations can have a strong impact on water yields, particularly under drier and non-forested ecosystems; and on soil acidity, especially where soils are sandy and/or highly weathered. Maximum C sequestration with minimum biogeochemical side-effects, requires careful zoning and design.