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Dietary switching of collembola in grassland soil food webs

Ladygina, Natalia LU ; Caruso, Tancredi and Hedlund, Katarina LU (2008) In Soil Biology & Biochemistry 40(11). p.2898-2903
Abstract
Soil food webs are characterised by complex direct and indirect effects among the organisms. Consumption of microorganisms by soil animals is considered as an important factor that contributes to the stability of communities, though cascading effects within the food web can be difficult to detect. In a greenhouse experiment, an addition of a high number the fungal feeding collembola Folsomia quadrioculata was applied to grassland soil food webs in monocultures of three plant species: Plantago lanceolato (forb), Lotus corniculatus (legume) and Holcus lanatus (grass). The abundance of microorganisms, determined as the abundances of phospholipid fatty acids (PLFAs) and the abundances of resident invertebrates, nematodes and collembolans, did... (More)
Soil food webs are characterised by complex direct and indirect effects among the organisms. Consumption of microorganisms by soil animals is considered as an important factor that contributes to the stability of communities, though cascading effects within the food web can be difficult to detect. In a greenhouse experiment, an addition of a high number the fungal feeding collembola Folsomia quadrioculata was applied to grassland soil food webs in monocultures of three plant species: Plantago lanceolato (forb), Lotus corniculatus (legume) and Holcus lanatus (grass). The abundance of microorganisms, determined as the abundances of phospholipid fatty acids (PLFAs) and the abundances of resident invertebrates, nematodes and collembolans, did not change due to the addition of E quadrioculata. Trophic positions of collembolans were determined by analyses of natural abundances of N-15 stable isotopes. The use of food resources by microorganisms and collembolans was determined by C-13 analysis of microbial PLFAs and solid samples of collembolans. delta C-13 values of the resident collembola Folsomia fimetaria were lower in the presence of E quadrioculata than in the control food webs indicating a use of more depleted C-13 food resources by E fimetaria. The delta N-15 values of E fimetaria did not change at the addition of E quadrioculata thus no change of trophic levels was detected. The switch of E fimetaria to a different food resource could be due to indirect interactions in the food web as the two collembolan species were positioned on different trophic positions, according to different delta N-15 values. (c) 2008 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Trophic interactions, Soil communities, PLFA, Stable isotope, Perturbation
in
Soil Biology & Biochemistry
volume
40
issue
11
pages
2898 - 2903
publisher
Elsevier
external identifiers
  • wos:000261007600023
  • scopus:53449102926
ISSN
0038-0717
DOI
10.1016/j.soilbio.2008.08.012
language
English
LU publication?
yes
id
f90c948c-378b-41cc-b757-7f13ec3ed3ba (old id 1308052)
date added to LUP
2009-03-19 11:30:00
date last changed
2017-03-05 03:57:18
@article{f90c948c-378b-41cc-b757-7f13ec3ed3ba,
  abstract     = {Soil food webs are characterised by complex direct and indirect effects among the organisms. Consumption of microorganisms by soil animals is considered as an important factor that contributes to the stability of communities, though cascading effects within the food web can be difficult to detect. In a greenhouse experiment, an addition of a high number the fungal feeding collembola Folsomia quadrioculata was applied to grassland soil food webs in monocultures of three plant species: Plantago lanceolato (forb), Lotus corniculatus (legume) and Holcus lanatus (grass). The abundance of microorganisms, determined as the abundances of phospholipid fatty acids (PLFAs) and the abundances of resident invertebrates, nematodes and collembolans, did not change due to the addition of E quadrioculata. Trophic positions of collembolans were determined by analyses of natural abundances of N-15 stable isotopes. The use of food resources by microorganisms and collembolans was determined by C-13 analysis of microbial PLFAs and solid samples of collembolans. delta C-13 values of the resident collembola Folsomia fimetaria were lower in the presence of E quadrioculata than in the control food webs indicating a use of more depleted C-13 food resources by E fimetaria. The delta N-15 values of E fimetaria did not change at the addition of E quadrioculata thus no change of trophic levels was detected. The switch of E fimetaria to a different food resource could be due to indirect interactions in the food web as the two collembolan species were positioned on different trophic positions, according to different delta N-15 values. (c) 2008 Elsevier Ltd. All rights reserved.},
  author       = {Ladygina, Natalia and Caruso, Tancredi and Hedlund, Katarina},
  issn         = {0038-0717},
  keyword      = {Trophic interactions,Soil communities,PLFA,Stable isotope,Perturbation},
  language     = {eng},
  number       = {11},
  pages        = {2898--2903},
  publisher    = {Elsevier},
  series       = {Soil Biology & Biochemistry},
  title        = {Dietary switching of collembola in grassland soil food webs},
  url          = {http://dx.doi.org/10.1016/j.soilbio.2008.08.012},
  volume       = {40},
  year         = {2008},
}