Universität zu Köln

Kramer, Susanne ORCID: 0000-0002-5506-9887, Dibbern, Dorte, Moll, Julia, Huenninghaus, Maike, Koller, Robert ORCID: 0000-0001-7251-7242, Krueger, Dirk, Marhan, Sven, Urich, Tim ORCID: 0000-0002-5718-1354, Wubet, Tesfaye ORCID: 0000-0001-8572-4486, Bonkowski, Michael ORCID: 0000-0003-2656-1183, Buscot, Francois ORCID: 0000-0002-2364-0006, Lueders, Tillmann ORCID: 0000-0002-9361-5009 and Kandeler, Ellen ORCID: 0000-0002-2854-0012 (2016). Resource Partitioning between Bacteria, Fungi, and Protists in the Detritusphere of an Agricultural Soil. Front. Microbiol., 7. LAUSANNE: FRONTIERS MEDIA SA. ISSN 1664-302X

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Abstract

The flow of plant-derived carbon in soil is a key component of global carbon cycling. Conceptual models of trophic carbon fluxes in soil have assumed separate bacterial and fungal energy channels in the detritusphere, controlled by both substrate complexity and recalcitrance. However, detailed understanding of the key populations involved and niche-partitioning between them is limited. Here, a microcosm experiment was performed to trace the flow of detritusphere C from substrate analogs (glucose, cellulose) and plant biomass amendments (maize leaves, roots) in an agricultural soil. Carbon flow was traced by rRNA stable isotope probing and amplicon sequencing across three microbial kingdoms. Distinct lineages within the Actinobacteria, Bacteroidetes, Gammaproteobacteria, Basidiomycota, Ascomycota as well as Peronosporomycetes were identified as important primary substrate consumers. A dynamic succession of primary consumers was observed especially in the cellulose treatments, but also in plant amendments over time. While intra-kingdom niche partitioning was clearly observed, distinct bacterial and fungal energy channels were not apparent. Furthermore, while the diversity of primary substrate consumers did not notably increase with substrate complexity, consumer succession and secondary trophic links to bacterivorous and fungivorous microbes resulted in increased food web complexity in the more recalcitrant substrates. This suggests that rather than substrate defined energy channels, consumer succession as well as intra- and inter-kingdom cross-feeding should be considered as mechanisms supporting food web complexity in the detritusphere.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kramer, Susanne UNSPECIFIED orcid.org/0000-0002-5506-9887 UNSPECIFIED Dibbern, Dorte UNSPECIFIED UNSPECIFIED UNSPECIFIED Moll, Julia UNSPECIFIED UNSPECIFIED UNSPECIFIED Huenninghaus, Maike UNSPECIFIED UNSPECIFIED UNSPECIFIED Koller, Robert UNSPECIFIED orcid.org/0000-0001-7251-7242 UNSPECIFIED Krueger, Dirk UNSPECIFIED UNSPECIFIED UNSPECIFIED Marhan, Sven UNSPECIFIED UNSPECIFIED UNSPECIFIED Urich, Tim UNSPECIFIED orcid.org/0000-0002-5718-1354 UNSPECIFIED Wubet, Tesfaye UNSPECIFIED orcid.org/0000-0001-8572-4486 UNSPECIFIED Bonkowski, Michael UNSPECIFIED orcid.org/0000-0003-2656-1183 UNSPECIFIED Buscot, Francois UNSPECIFIED orcid.org/0000-0002-2364-0006 UNSPECIFIED Lueders, Tillmann UNSPECIFIED orcid.org/0000-0002-9361-5009 UNSPECIFIED Kandeler, Ellen UNSPECIFIED orcid.org/0000-0002-2854-0012 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-262091
DOI:	10.3389/fmicb.2016.01524
Journal or Publication Title:	Front. Microbiol.
Volume:	7
Date:	2016
Publisher:	FRONTIERS MEDIA SA
Place of Publication:	LAUSANNE
ISSN:	1664-302X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language DNA-SIP; MICROBIAL COMMUNITIES; ORGANIC-MATTER; FATTY-ACIDS; FOOD-WEB; CARBON; IDENTIFICATION; DECOMPOSITION; CELLULOSE; RESIDUE Multiple languages Microbiology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/26209