Advanced

Carbon routes from decomposing plant residues and living roots into soil food webs assessed with C-13 labelling

Elfstrand, Sara; Lagerlöf, Jan; Hedlund, Katarina LU and Martensson, Anna (2008) In Soil Biology & Biochemistry 40(10). p.2530-2539
Abstract
This field experiment investigated how C from fresh organic amendments and from a growing leek crop was allocated into different soil microbial and faunal groups in an arable field. A C-13-enriched red clover green manure was incorporated in one treatment, while the growing leek crop was pulse labelled with (CO2)-C-13 in another. Incorporation of C-13 into microbial fatty acids, micro- and macroarthropods, enchytraeids and earthworms was determined on several occasions during the growing season in order to determine whether different groups or species of microorganisms and fauna were specialised on either the decomposing green manure material or root-derived C. Compound-specific stable isotope ratio analysis showed fatty acid markers of... (More)
This field experiment investigated how C from fresh organic amendments and from a growing leek crop was allocated into different soil microbial and faunal groups in an arable field. A C-13-enriched red clover green manure was incorporated in one treatment, while the growing leek crop was pulse labelled with (CO2)-C-13 in another. Incorporation of C-13 into microbial fatty acids, micro- and macroarthropods, enchytraeids and earthworms was determined on several occasions during the growing season in order to determine whether different groups or species of microorganisms and fauna were specialised on either the decomposing green manure material or root-derived C. Compound-specific stable isotope ratio analysis showed fatty acid markers of actinomycetes and Gram-positive bacteria to be more strongly linked to C originating from the decomposing green manure material, whereas the marker for arbuscular mycorrhizal fungi was more linked to C from the growing leek crop. In contrast, several markers for Gram-negative bacteria were the most C-13-enriched and had incorporated more C-13 than the other phospholipid fatty acids in both treatments, indicating a general dominance irrespective of C source. Most soil fauna seemed to derive their C directly or indirectly from the decomposing plant material, while C from the growing crop appeared to be of secondary importance in this agroecosystem. (C) 2008 Elsevier Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Compound-specific stable isotope ratio analysis, Allium porrum L, Decomposers, Phospholipid fatty acid, Grazers, Soil fauna, Trifolium, pratense L.
in
Soil Biology & Biochemistry
volume
40
issue
10
pages
2530 - 2539
publisher
Elsevier
external identifiers
  • wos:000260444000007
  • scopus:51549088993
ISSN
0038-0717
DOI
10.1016/j.soilbio.2008.06.013
language
English
LU publication?
yes
id
f50a685a-8aa3-4870-a336-3bbe39e62950 (old id 1283765)
date added to LUP
2009-02-10 10:05:39
date last changed
2017-07-02 03:54:31
@article{f50a685a-8aa3-4870-a336-3bbe39e62950,
  abstract     = {This field experiment investigated how C from fresh organic amendments and from a growing leek crop was allocated into different soil microbial and faunal groups in an arable field. A C-13-enriched red clover green manure was incorporated in one treatment, while the growing leek crop was pulse labelled with (CO2)-C-13 in another. Incorporation of C-13 into microbial fatty acids, micro- and macroarthropods, enchytraeids and earthworms was determined on several occasions during the growing season in order to determine whether different groups or species of microorganisms and fauna were specialised on either the decomposing green manure material or root-derived C. Compound-specific stable isotope ratio analysis showed fatty acid markers of actinomycetes and Gram-positive bacteria to be more strongly linked to C originating from the decomposing green manure material, whereas the marker for arbuscular mycorrhizal fungi was more linked to C from the growing leek crop. In contrast, several markers for Gram-negative bacteria were the most C-13-enriched and had incorporated more C-13 than the other phospholipid fatty acids in both treatments, indicating a general dominance irrespective of C source. Most soil fauna seemed to derive their C directly or indirectly from the decomposing plant material, while C from the growing crop appeared to be of secondary importance in this agroecosystem. (C) 2008 Elsevier Ltd. All rights reserved.},
  author       = {Elfstrand, Sara and Lagerlöf, Jan and Hedlund, Katarina and Martensson, Anna},
  issn         = {0038-0717},
  keyword      = {Compound-specific stable isotope ratio analysis,Allium porrum L,Decomposers,Phospholipid fatty acid,Grazers,Soil fauna,Trifolium,pratense L.},
  language     = {eng},
  number       = {10},
  pages        = {2530--2539},
  publisher    = {Elsevier},
  series       = {Soil Biology & Biochemistry},
  title        = {Carbon routes from decomposing plant residues and living roots into soil food webs assessed with C-13 labelling},
  url          = {http://dx.doi.org/10.1016/j.soilbio.2008.06.013},
  volume       = {40},
  year         = {2008},
}