Organic matter from biological soil crusts induces the initial formation of sandy temperate soils

Auteur(s) et Affiliation(s)

DÜMIG, A.

Lehrstuhl für Bodenkunde, Dept. für ÖKologie und Ökosystemmanagement, Wissenchaftszentrum Weihenstephan für Ernährung, Landnutzung und Umwelt, Technische Univ. München, Freising-Weihenstephan, Allemagne

VESTE, M.

Centrum für Energietechnologie Brandenburg, Cottbus, Allemagne

HAGEDORN, F.

Dept. of Biogeochemistry, WSL, Swiss Federal Inst. of Forest, Snow and Landscape Research, Birmensdorf, Suisse

FISCHER, T.

Brandenburg Univ. of Technology, Fac. of Environmental Sciences and Process Engineering, Central Analytical Lab., Cottbus, Allemagne

LANGE, P.

Brandenburg Univ. of Technology, Fac. of Environmental Sciences and Process Engineering, Central Analytical Lab., Cottbus, Allemagne

SPRÖTE, R.

Brandenburg Univ. of Technology, Chair of Soil Protection and Recultivation, Cottbus, Allemagne

KÖGEL-KNABNER, I.

Inst. for Advanced Study, Technische Univ. München, Garching, Allemagne

Description :
Different development stages of algae-dominated and moss-dominated biological soil crusts (BSCs) were sampled on a natural sand dune (< 17 years old) and on an experimental sand dune (< 8 years old) along a catena, including gradients of vegetation cover, location on the slope, as well as composition and thickness of BSC organisms in Brandenburg, northeastern Germany. The OC composition was characterized by solid-state 13C NMR spectroscopy and the carbohydrate-C signature. 14C contents were determined to assess the origin and dynamics of OC. From the radiocarbon contents, two OC pools were differentiated : recent BSC-derived and lignite-derived old OC. Downward movement of OC into the underlying substrate was found only under moss-dominated BSCs at the old sand dune. Because of the channeling effect of mosses, OC depth translocation along with suspended colloidal substances may contribute to OC accumulation in substrates.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2014, n°. 122, p. 196-208, nombre de pages : 13, Références bibliographiques : 2 p.

Date :
2014

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

Langue :
Anglais