Detection of active oxalate–carbonate pathway ecosystems in the Amazon Basin : Global implications of a natural potential C sink

Auteur(s) et Affiliation(s)

CAILLEAU, G.

Biogeosciences Lab., Inst. of Earth Surface Dynamics, Univ., Lausanne, Suisse

Lab. of Microbiology, Inst. of Biology, Univ., Neuchâtel, Suisse

MOTA, M.

Univ. for Viticulture and Oenology, Nyon, Suisse

BINDSCHEDLER, S.

Lab. of Microbiology, Inst. of Biology, Univ., Neuchâtel, Suisse

Dept. of Environmental Microbiology, Helmholtz Centre for Environmental Research GmbH, Leipzig, Allemagne

JUNIER, P.

Lab. of Microbiology, Inst. of Biology, Univ., Neuchâtel, Suisse

VERRECCHIA, E.P.

Biogeosciences Lab., Inst. of Earth Surface Dynamics, Univ., Lausanne, Suisse

Description :
The oxalate–carbonate pathway (OCP) is a biogeochemical process, which has been described in Milicia excelsa tree ecosystems of Africa. The aim of this study is twofold : 1) to make an inventory of trees in the Amazon Basin presenting some of the characteristics associated to an active OCP; and 2) to validate a field methodology for the screening and characterization of OCP systems that can be applied worldwide. This study highlights the implication of OCP ecosystems on carbon and calcium biogeochemical coupled cycles. As previously mentioned for M. excelsa tree ecosystems in Africa, carbonate accumulations observed in the Bolivian tropical forest could be extrapolated to part or the whole Amazon Basin and might constitute an important reservoir that must be taken into account in the global carbon balance of the Tropics.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2014, vol. 116, p. 132-141, nombre de pages : 10, Références bibliographiques : 37 ref.

Date :
2014

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais