Javascript verkar inte påslaget? - Vissa delar av Lunds universitets webbplats fungerar inte optimalt utan javascript, kontrollera din webbläsares inställningar.
Du är här

Damped trophic cascades driven by fishing in model marine ecosystems

  • Ken Haste Andersen
  • Martin Pedersen
Publiceringsår: 2010
Språk: Engelska
Sidor: 795-802
Publikation/Tidskrift/Serie: Proceedings of the Royal Society. Biological Sciences
Volym: 277
Nummer: 1682
Dokumenttyp: Artikel
Förlag: Royal Society Publ.


The largest perturbation on upper trophic levels of many marine ecosystems stems from fishing. The reaction of the ecosystem goes beyond the trophic levels directly targeted by the fishery. This reaction has been described either as a change in slope of the overall size spectrum or as a trophic cascade triggered by the removal of top predators. Here we use a novel size- and trait-based model to explore how marine ecosystems might react to perturbations from different types of fishing pressure. The model explicitly resolves the whole life history of fish, from larvae to adults. The results show that fishing does not change the overall slope of the size spectrum, but depletes the largest individuals and induces trophic cascades. A trophic cascade can propagate both up and down in trophic levels driven by a combination of changes in predation mortality and food limitation. The cascade is damped as it comes further away from the perturbed trophic level. Fishing on several trophic levels leads to a disappearance of the signature of the trophic cascade. Differences in fishing patterns among ecosystems might influence whether a trophic cascade is observed.



  • Biology and Life Sciences
  • size spectrum
  • community model
  • ecosystem
  • approach to fisheries management


  • ISSN: 0962-8452 Print
  • ISSN: 1471-2954 0nline

Box 117, 221 00 LUND
Telefon 046-222 00 00 (växel)
Telefax 046-222 47 20
lu [at] lu [dot] se

Fakturaadress: Box 188, 221 00 LUND
Organisationsnummer: 202100-3211
Om webbplatsen