Universität zu Köln

Angst, Gerrit ORCID: 0000-0003-4421-5444, John, Stephan, Mueller, Carsten W., Koegel-Knabner, Ingrid and Rethemeyer, Janet (2016). Tracing the sources and spatial distribution of organic carbon in subsoils using a multi-biomarker approach. Sci Rep, 6. LONDON: NATURE PUBLISHING GROUP. ISSN 2045-2322

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Abstract

Soil organic carbon (SOC) from aboveground and belowground sources has rarely been differentiated although it may drive SOC turnover and stabilization due to a presumed differing source dependent degradability. It is thus crucial to better identify the location of SOC from different sources for the parameterization of SOC models, especially in the less investigated subsoils. The aim of this study was to spatially assess contributions of organic carbon from aboveground and belowground parts of beech trees to subsoil organic carbon in a Dystric Cambisol. Different sources of SOC were distinguished by solvent-extractable and hydrolysable lipid biomarkers aided by C-14 analyses of soil compartments <63 mu m. We found no effect of the distance to the trees on the investigated parameters. Instead, a vertical zonation of the subsoil was detected. A high contribution of fresh leaf-and root-derived organic carbon to the upper subsoil (leaf-and root-affected zone) indicate that supposedly fast-cycling, leaf-derived SOC may still be of considerable importance below the A-horizon. In the deeper subsoil (root-affected zone), roots were an important source of fresh SOC. Simultaneously, strongly increasing apparent C-14 ages (3860 yrs BP) indicate considerable contribution of SOC that may be inherited from the Pleistocene parent material.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Angst, Gerrit UNSPECIFIED orcid.org/0000-0003-4421-5444 UNSPECIFIED John, Stephan UNSPECIFIED UNSPECIFIED UNSPECIFIED Mueller, Carsten W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Koegel-Knabner, Ingrid UNSPECIFIED UNSPECIFIED UNSPECIFIED Rethemeyer, Janet UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-270116
DOI:	10.1038/srep29478
Journal or Publication Title:	Sci Rep
Volume:	6
Date:	2016
Publisher:	NATURE PUBLISHING GROUP
Place of Publication:	LONDON
ISSN:	2045-2322
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MICROBIAL COMMUNITY COMPOSITION; HYDROLYZABLE ALIPHATIC LIPIDS; ESTER-BOUND LIPIDS; FINE-ROOT CARBON; CHEMICAL-COMPOSITION; FATTY-ACIDS; SOIL; PLANT; MATTER; LEAVES Multiple languages Multidisciplinary Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/27011