The quantification of stocked C in natural environment and the evaluation of its sensibility towards the climatic changes or land use represent a research domain in great expansion. The Amazon Region presents a large area of Spodosols (ES), characterized by the presence of thick sandy horizons, overlaying more clayey horizons. The organic matter (OM) formed on the surface is transferred, by percolating waters, through the sandy horizons. Then, it is accumulated in the transition of the sandy and clayey horizons, at a depth varying from 1 to 3 meters, forming deep spodic horizons. Recent studies carried out in the Amazon Region, by part of the team-work of this project, has shown that the Spodosols can store over 13,6 Pg C in the deep Bh horizons. The question is to know the stability of these soils face to land use or climatic changes. In the case of the Bh horizon, the desiccation of these soils, normally saturated, could lead to a partial or total mineralization of the organic matter, resulting in the emission of a large amount of greenhouse effect gases. Therefore, the project aims to estimate the C stock in forest Spodosols, the tax of CO2 emission and evaluate its vulnerability under different land use and climatic conditions. It would be necessary: (i) to produce maps with C content, using the estimated stock, obtained by field data crossing, pedological maps and satellite image; (ii) to collect samples for the evaluation of organic matter vulnerability towards C mineralization, by means of quantifying the metabolism by microorganisms; (iii) to associate the results regarding the organic matter vulnerability with the C content maps to produce maps of C vulnerability. (AU)
Articles published in Agência FAPESP Newsletter about the research grant:
TADINI, AMANDA MARIA;
NOGUEIRA, MARCELO SAITO;
CLABEL HUAMAN, JOSE LUIS;
DOS SANTOS, CLEBER HILARIO;
MONTES, CELIA REGINA;
BASTOS PEREIRA MILORI, DEBORA MARCONDES.
Fluorescence lifetime evaluation of whole soils from the Amazon rainforest.
AUG 20 2017.
Web of Science Citations: 3.