umu.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Interaction strength and stability in stage‐structured food web modules
Dept of Integrative Biology, Univ. of Guelph, Canada.
2018 (English)In: Oikos, ISSN 0030-1299, E-ISSN 1600-0706, Vol. 127, no 10, p. 1494-1505Article in journal (Refereed) Published
Abstract [en]

There has been a long‐standing debate on what creates stability in food webs. One major finding is that weak interactions can mute the destabilizing potential of strong interactions. Considering that stage structure is common in nature, that existing studies on stability that include population stage structure point in different directions, and the recent theoretical developments in the area of stage structure, there is a need to address the effects of population stage structure in this context. Using simple food web modules, with stage structure in an intermediate consumer, we here begin to theoretically investigate the effects of stage structure on food web stability. We found a general correspondence to previous results such that strong interactions had destabilizing effects and weak interactions that result in decreased energy flux had stabilizing effects. However, we also found a number of novel results connected to stage structure. Interestingly, weak interactions can be destabilizing when they excite other interactions. We also found that cohort cycles and predator–prey cycles did not respond in the same way to increasing interactions strength. We found that the combined effects of two predators feeding on the same prey can strongly destabilize a system. Consistent with previous studies, we also found that stage‐specific feeding can create a refuge effect that leads to a lack of strong destabilization at high interaction strength. Overall, stage structure had both stabilizing and destabilizing aspects. Some effects could be explained by our current understanding of energetic processes; others need additional consideration. Additional aspects such as shunting of energy between stages, control of biomass fluxes, and interactions between lags and energy flux, should be considered.

Place, publisher, year, edition, pages
John Wiley & Sons, 2018. Vol. 127, no 10, p. 1494-1505
Keywords [en]
interaction strength, stability, stage structure
National Category
Ecology
Identifiers
URN: urn:nbn:se:umu:diva-158616DOI: 10.1111/oik.05029ISI: 000446267600009Scopus ID: 2-s2.0-85047664479OAI: oai:DiVA.org:umu-158616DiVA, id: diva2:1313267
Available from: 2019-05-02 Created: 2019-05-02 Last updated: 2019-05-03Bibliographically approved

Open Access in DiVA

fulltext(1822 kB)15 downloads
File information
File name FULLTEXT02.pdfFile size 1822 kBChecksum SHA-512
a12b00987384f4f1461eeef6c6712a628818a01b8ccfa6d62fa0ffde76d1fab69f6b87549602c7fb66cde317dea4ed330b039a986dbeb930598ae8bbb2ea1807
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopus

Authority records BETA

Nilsson, Karin A.

Search in DiVA

By author/editor
Nilsson, Karin A.
In the same journal
Oikos
Ecology

Search outside of DiVA

GoogleGoogle Scholar
Total: 15 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 46 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf