IGB

Connexion

(Article of periodic en Anglais - 2014)

Document title

Inaccessible Andean sites reveal human-induced weathering in grazed soils

Authors(s) and Affiliation(s)

HEITKAMP F. (1) ; SYLVESTER S.P. (2) ; KESSLER M. (2) ; SYLVESTER M.D.P.V. (2 4) ; JUNGKUNST H.F. (3) ;
(1) Georg-August Univ., Göttingen, ALLEMAGNE
(2) Univ., Zurich, SUISSE
(3) Univ., Koblenz-Landau, ALLEMAGNE
(4) Univ. Nacional del San Antonio Abad, Cusco, PEROU

Abstract

Here, the AA. show undisturbed soil development, i.e. the processes of weathering and accumulation of soil organic matter (SOM), by comparing pristine with grazed sites in the high Andes (4500 m) of southern Peru. Plots with pristine vegetation were compared to rangeland plots that were presumably under relatively constant grazing management for at least four millennia. Vegetation change, induced by grazing management, led to lower vegetation cover of the soil, thereby increasing soil surface temperatures and soil acidification. Both factors increased weathering in rangeland soils. Formation of pedogenic oxides with high surface area explained preservation of SOM, with positive feedback to acidification. With this work, the AA. present a conceptual framework of positive feedback links between human-induced vegetation change, soil development and accumulation of SOM, which is only possible due to the unique baseline values of a pristine ecosystem

Source

Article of periodic

published at : Progress in physical geography / ISSN 0309-1333 / CODEN PPGEEC

Editor : Sage Publications, London - ROYAUME-UNI (1977)

Millesime : 2014, vol. 38, no5 [pp. 576-601]

Bibliographic references : 4 p.

Collation : 8 fig., 4 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 14648 A

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1177/0309133314544918

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
Refdoc record number (ud4) : 28944223 : Permanent link - XML version
Powered by Pxxo