The ORNL DAAC and the LBA DIS announce the release of four data sets from Nutrient Dynamics teams within the LBA-ECO component of the Large Scale Biosphere-Atmosphere Experiment in Amazonia (LBA).
- LBA-ECO ND-02 CO2 Flux from Soils in Forests and Pastures, Acre, Brazil: 1999-2001. Data set prepared by C.I. Salimon, E.A. Davidson, R.L. Victoria, and A.W.F. Melo. This data set reports soil CO2 flux and results of physical and chemical characterization of soils from pastures, secondary forests, and mature forests near Rio Branco, Acre, Brazil.
- LBA-ECO ND-02 Stream Water Chemistry, Paragominas, Para, Brazil: 1999-2005. Data set prepared by E.A. Davidson, D. Markewitz, and R. de Figueiredo. This data set includes measurements of dissolved nutrient and organic carbon concentrations, as well as dissolved oxygen, alkalinity, conductivity, turbidity, pH, and discharge from three streams located in mixed land use (crop fields, pastures, secondary vegetation, and forest) and two streams in entirely forested landscapes near Paragominas in the state of Para, Brazil.
- LBA-ECO ND-04 Secondary Forest Vegetation and Soil Carbon and Nutrient Stocks, Brazil. Data set prepared by T.R. Feldpausch, T.R., M.A. Rondon, E.C.M. Fernandes, S.J. Riha. and E. Wandelli. This data set reports the carbon and nutrient stocks of above-ground vegetation and soil pools at three locations where post-pasture secondary forest recovery ranged from 0 to 14 years since abandonment. These sites are located in the state of Amazonas, Brazil, along the road BR-174 north of the city of Manaus within three fazendas (cattle ranches) now in various stages of grazing, pasture abandonment, or pasture reclamation.
- LBA-ECO ND-04 Secondary Forest Recovery, Structure, and LAI, Central Amazonia, Brazil. Data set prepared by T.R. Feldpausch, T.R., E.C.M. Fernandes, M.A. Rondon, S.J. Riha, and E. Wandelli. This data set reports measurements of the canopy and structure of secondary forests regenerating from abandoned pastures. These secondary forests are located in the state of Amazonas, Brazil, along the road BR-174 north of the city of Manaus within three fazendas (cattle ranches) now in various stages of grazing, pasture abandonment, or pasture reclamation.
LBA is an international research initiative under the leadership of Brazil. The project focuses on the climatological, ecological, biogeochemical, and hydrological functions of Amazonia; the impact of land use change on these functions; and the interactions between Amazonia and the Earth system. The LBA-ECO component, which is funded by NASA, focuses on the question: "How do tropical forest conversion, regrowth, and selective logging influence carbon storage, nutrient dynamics, trace gas fluxes, and the prospect for sustainable land use in Amazonia?"
See the LBA Project page for further information about the study and to access associated data and documentation maintained by the ORNL DAAC.
The ORNL DAAC is a NASA-funded data center archiving and distributing terrestrial ecology and biogeochemical dynamics data. The LBA Data and Information System (LBA-DIS) has been developed by INPE with NASA's participation.