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Trophic interactions in changing landscapes: responses of soil food webs

Hedlund, Katarina LU ; Griffiths, B; Christensen, S; Scheu, S; Setälä, H; Tscharntke, T and Verhoef, H (2004) In Basic and Applied Ecology 5(6). p.495-503
Abstract
Soil communities in landscapes that are rapidly changing due to a range of anthropogenic processes can be regarded as highly transient systems where interactions between competing species or trophic levels may be seriously disrupted. In disturbed communities dispersal in space and time has a role in ensuring continuity of community function. Stable communities, in undisturbed systems, are more dependent on competition and other biotic interactions between species. We predicted how food web components would respond to disturbance, based on their dispersal and colonizing abilities. During decomposition, flows of energy and nutrients generally follow either a bacterial-based path, with bacteria as the primary decomposer and bacterial-feeding... (More)
Soil communities in landscapes that are rapidly changing due to a range of anthropogenic processes can be regarded as highly transient systems where interactions between competing species or trophic levels may be seriously disrupted. In disturbed communities dispersal in space and time has a role in ensuring continuity of community function. Stable communities, in undisturbed systems, are more dependent on competition and other biotic interactions between species. We predicted how food web components would respond to disturbance, based on their dispersal and colonizing abilities. During decomposition, flows of energy and nutrients generally follow either a bacterial-based path, with bacteria as the primary decomposer and bacterial-feeding fauna and their predators forming the associated food web, or a fungal-based channel. Trophic links that were generally resistant to change were the organisms of the bacterial. pathway that have high abilities to disperse in time and passively disperse in space. Organisms in the fungal pathway were less resistant to disturbance. Resource inputs to the soil system are derived from plants, either through root exudation and root turnover during active growth or from dead plant material following senescence or agricultural tillage. Disturbances to the soil system can arise as a direct action on the soil, or indirectly from effects on the above-ground plant community. Disturbance-induced changes in plant community composition will change the soil food web composition. Organisms involved in direct interactions with plants (e.g. AM-mycorrhizal fungi) were also predicted to be vulnerable to disturbance. (C) 2004 Elsevier GmbH. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Basic and Applied Ecology
volume
5
issue
6
pages
495 - 503
publisher
Elsevier
external identifiers
  • wos:000226824700002
  • scopus:11144237721
ISSN
1618-0089
DOI
10.1016/j.baae.2004.09.002
language
English
LU publication?
yes
id
ada58e8b-f3b5-4fa9-991d-97575aebd4b5 (old id 145272)
date added to LUP
2007-06-25 13:31:13
date last changed
2017-11-12 03:23:02
@article{ada58e8b-f3b5-4fa9-991d-97575aebd4b5,
  abstract     = {Soil communities in landscapes that are rapidly changing due to a range of anthropogenic processes can be regarded as highly transient systems where interactions between competing species or trophic levels may be seriously disrupted. In disturbed communities dispersal in space and time has a role in ensuring continuity of community function. Stable communities, in undisturbed systems, are more dependent on competition and other biotic interactions between species. We predicted how food web components would respond to disturbance, based on their dispersal and colonizing abilities. During decomposition, flows of energy and nutrients generally follow either a bacterial-based path, with bacteria as the primary decomposer and bacterial-feeding fauna and their predators forming the associated food web, or a fungal-based channel. Trophic links that were generally resistant to change were the organisms of the bacterial. pathway that have high abilities to disperse in time and passively disperse in space. Organisms in the fungal pathway were less resistant to disturbance. Resource inputs to the soil system are derived from plants, either through root exudation and root turnover during active growth or from dead plant material following senescence or agricultural tillage. Disturbances to the soil system can arise as a direct action on the soil, or indirectly from effects on the above-ground plant community. Disturbance-induced changes in plant community composition will change the soil food web composition. Organisms involved in direct interactions with plants (e.g. AM-mycorrhizal fungi) were also predicted to be vulnerable to disturbance. (C) 2004 Elsevier GmbH. All rights reserved.},
  author       = {Hedlund, Katarina and Griffiths, B and Christensen, S and Scheu, S and Setälä, H and Tscharntke, T and Verhoef, H},
  issn         = {1618-0089},
  language     = {eng},
  number       = {6},
  pages        = {495--503},
  publisher    = {Elsevier},
  series       = {Basic and Applied Ecology},
  title        = {Trophic interactions in changing landscapes: responses of soil food webs},
  url          = {http://dx.doi.org/10.1016/j.baae.2004.09.002},
  volume       = {5},
  year         = {2004},
}