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Connexion

(StuttgartInternational Conference "Landscapes and Soils through Time" en Anglais - 2014)

Document title

Lateral and depth variation of loess organic matter overprint related to rhizoliths — Revealed by lipid molecular proxies and X-ray tomography

published at : Landscapes and soils through time

Authors(s) and Affiliation(s)

GOCKE M. (1) ; PETH S. (2) ; WIESENBERG G.L.B. (3) ;
(1) Dept. of Agroecosystem Research, BayCEER, Univ., Bayreuth, ALLEMAGNE
(2) Dept. of Soil Science, Univ. of Kassel, Witzenhausen, ALLEMAGNE
(3) Dept. of Geography, Univ., Zürich, SUISSE

Abstract

Although organic carbon contents are commonly very low, loess and organic matter (LOM) thereof is regarded as important terrestrial archive for vegetation and climate during deposition. However, the LOM signal is prone to contamination by OM of other age and origin than the synsedimentary vegetation. The AA. hypothesized that the influence of rhizosphere effects related to deep-rooting plants varies with depth in quality, quantity and distance to the former root. The 13 m thick late Pleistocene loess-paleosol sequence at Nussloch (near Heidelberg, SW Germany) contains rhizoliths (calcified roots) of Holocene age. With the carbonatic encrustation leading to preservation of former root deposits, rhizoliths allow for assessment of rhizosphere processes that occurred during the root's lifetime. It is shown that alkane and fatty acid proxies are suitable to identify rhizosphere extension. This was confirmed by X-ray tomography analyses

Source

Congrès

International Conference "Landscapes and Soils through Time", Stuttgart , ALLEMAGNE (29/07/2011 - 01/08/2011)

published at : Catena / ISSN 0341-8162

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

Millesime : 2014, vol. 112 [pp. 72-85]

Bibliographic references : 1 p.

Collation : fig., tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2012.11.011

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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