(Article of periodic en Anglais - 2009)

Document title

Microbiotic soil crusts in the Sahel of Western Niger and their influence on soil porosity and water dynamics

Authors(s) and Affiliation(s)

MALAM ISSA O. (1) ; DÉFARGE C. (2) ; TRICHET J. (2) ; VALENTIN C. (3) ; RAJOT J.L. (3) ;
(1) Univ. Reims Champagne-Ardenne, CEGENA EA 3795, CREA, Reims, FRANCE
(2) ISTO, UMR 6113-CNRS, Univ., Orléans, FRANCE
(3) UR "Solutions", IRD, Bondy, FRANCE


The AA. focused on soil porosity, runoff and the water retention capacity of soils with microbiotic crusts in Sahelian environments in Western Niger. The study aimed at highlighting soil hydrological processes at the surface of microbially covered soils in a Sahelian ecosystem. The methodological approach was based on comparisons between microbial soil crusts of varied cover and the horizon beneath these crusts. Results of in-situ runoff measurements are discussed in light of microscopic investigations and laboratory measurements of soil porosity and water retention capacity. Final runoff values obtained on densely covered surfaces were significantly higher compared to those measured on surfaces with thin microbial cover due to the geometry of the microbially-originated pore system and its functioning


Article of periodic

published at : Catena / ISSN 0341-8162

Editor : Catena, Cremlingen-Destedt - ALLEMAGNE (1973)

Millesime : 2009, vol. 77, no1 [pp. 48-55]

Bibliographic references : 1 p.

Collation : 7 fig., 3 tabl.



INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2008.12.013

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2009
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