Carbon dynamics in aboveground coarse wood biomass of wetland forests in the northern Pantanal, Brazil

J. Schöngart (1, 2) , J. Arieira (3) , C. Felfili Fortes (3) , E. Cezarine de Arruda (3) , C. Nunes da Cunha (3)

1 MPIC - Max Planck Institute for Chemistry
2 INPA - Instituto Nacional de Pesquisas da Amazônia = National Institute of Amazonian Research
3 Universidade Federal de Mato Grosso

This is the first estimation on carbon dynamics in the aboveground coarse wood biomass (AGWB) of wetland forests in the Pantanal, located in Central Southern America. In four 1-ha plots in stands characterized by the pioneer species Vochysia divergens Pohl (Vochysiaceae) forest inventories (trees ?10 cm diameter at breast height, DBH) have been performed and converted to predictions of AGWB by five different allometric models using two or three predicting parameters (DBH, tree height, wood density). Best prediction has been achieved using allometric equations with three independent variables. Carbon stocks (50% of AGWB) vary from 7.4 to 100.9 Mg C ha^?1 between the four stands. Carbon sequestration differs 0.50?4.24 Mg C ha^?1 yr^?1 estimated by two growth models derived from tree-ring analysis describing the relationships between age and DBH for V. divergens and other tree species. We find a close correlation between estimated tree age and C-stock, C-sequestration and C-turnover (mean residence of C in AGWB).

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]; Astrophysique [astro-ph]; Interfaces continentales, environnement; Océan, Atmosphère; Sciences de la Terre

J. Schöngart, J. Arieira, C. Felfili Fortes, E. Cezarine de Arruda, C. Nunes da Cunha. Carbon dynamics in aboveground coarse wood biomass of wetland forests in the northern Pantanal, Brazil. Biogeosciences Discussions, 2008, 5 (3), pp.2103-2130. ⟨hal-00298007⟩