Soil Biogeochemistry of Carbon, Nutrients, and Trace Gases in the Amazon Region of Brazil: Field and Model Studies of Natural and Managed Conditions
Michael Keller, University of New Hampshire (US-PI)
William Zamboni de Mello, Universidade Federal Fluminense (UFF) (SA-PI)
We propose to address two
theme areas of LBA-Ecology, carbon storage and exchange and trace gas fluxes.
We plan to estimate ecosystem respiration and trace gas fluxes for the
undisturbed and logged forest sites at the Tapajos National Forest (TNF).
Our proposed work is summarized in two objectives:
1) Quantification of the
soil-atmosphere exchange of carbon dioxide (CO2), nitrous oxide (N2O), nitric
oxide (NO) and methane (CH4) in logged and undisturbed upland forests on
contrasting soil types over a range of spatial (~m2 to ~km2) and temporal scales
(hours to years) at several LBA forested sites in the Amazon region.
2) Quantification of
ecosystem respiration components (including soil, bole and coarse necromass) in
mature upland forests and in logged forests.
We propose measurements of
trace gases using manually deployed and continously operated automated chambers
and profiles of trace gas mixing ratios from towers at the TNF. We will
extend our measurements to other LBA tower sites using a portable system for
measurement of soil-atmosphere CO2 flux and profiles of CO2, N2O and CH4.