umu.sePublikationer
Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Simple rules describe bottom-up and top-down control in food webs with alternative energy pathways
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för ekologi, miljö och geovetenskap.
2012 (Engelska)Ingår i: Ecology Letters, ISSN 1461-023X, E-ISSN 1461-0248, Vol. 15, nr 9, s. 935-946Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Many human influences on the world's ecosystems have their largest direct impacts at either the top or the bottom of the food web. To predict their ecosystem-wide consequences we must understand how these impacts propagate. A long-standing, but so far elusive, problem in this endeavour is how to reduce food web complexity to a mathematically tractable, but empirically relevant system. Simplification to main energy channels linking primary producers to top consumers has been recently advocated. Following this approach, we propose a general framework for the analysis of bottom-up and top-down forcing of ecosystems by reducing food webs to two energy pathways originating from a limiting resource shared by competing guilds of primary producers (e.g. edible vs. defended plants). Exploring dynamical models of such webs we find that their equilibrium responses to nutrient enrichment and top consumer harvesting are determined by only two easily measurable topological properties: the lengths of the component food chains (oddodd, oddeven, or eveneven) and presence vs. absence of a generalist top consumer reconnecting the two pathways (yielding looped vs. branched webs). Many results generalise to other looped or branched web structures and the model can be easily adapted to include a detrital pathway.

Ort, förlag, år, upplaga, sidor
Wiley-Blackwell, 2012. Vol. 15, nr 9, s. 935-946
Nyckelord [en]
Bottom-up control, dynamical model, energy channel, enrichment, food chain length, food web, harvesting, indirect effects, top-down control, topology
Nationell ämneskategori
Miljövetenskap
Identifikatorer
URN: urn:nbn:se:umu:diva-57810DOI: 10.1111/j.1461-0248.2012.01823.xISI: 000306475600002OAI: oai:DiVA.org:umu-57810DiVA, id: diva2:545091
Tillgänglig från: 2012-08-17 Skapad: 2012-08-16 Senast uppdaterad: 2018-06-08Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltext

Personposter BETA

Diehl, Sebastian

Sök vidare i DiVA

Av författaren/redaktören
Diehl, Sebastian
Av organisationen
Institutionen för ekologi, miljö och geovetenskap
I samma tidskrift
Ecology Letters
Miljövetenskap

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 375 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf