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Indirect effects of fish community structure on submerged vegetation in shallow, eutrophic lakes: an alternative mechanism
Limnology, Department of Ecology, Lund University, Lund, Sweden.
Limnology, Department of Ecology, Lund University, Lund, Sweden.ORCID-id: 0000-0002-5181-0391
1992 (Engelska)Ingår i: Hydrobiologia, ISSN 0018-8158, E-ISSN 1573-5117, Vol. 243/244, nr 1, s. 293-301Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The loss of submerged macrophytes during eutrophication of shallow takes is a commonly observed phenomenon. The proximate reason for this decline is a reduction of available light due to increasing phytoplankton and/or epiphyton biomass. Here we argue that the ultimate cause for the transition from a macrophyte-dominated state to a phytoplankton-dominated state is a change in fish community structure. A catastrophic disturbance event (e.g. winterkill) acting selectively on piscivores, cascades down food chains, eventually reducing macrophyte growth through shading by epiphyton, an effect that is reinforced by increasing phytoplankton biomass. The transition back from the phytoplankton to the macrophyte state depends on an increase in piscivore standing stock and a reduction of planktivores. A conceptual model of these mechanisms is presented and supported by literature data and preliminary observations from a field experiment. © 1992 Kluwer Academic Publishers.

Ort, förlag, år, upplaga, sidor
Dordrecht: Springer Netherlands, 1992. Vol. 243/244, nr 1, s. 293-301
Nyckelord [en]
Fish, community structure, vegetation, eutrophic lakes
Nationell ämneskategori
Ekologi
Identifikatorer
URN: urn:nbn:se:hh:diva-27668DOI: 10.1007/BF00007045ISI: A1992JZ96300031Scopus ID: 2-s2.0-0027041042OAI: oai:DiVA.org:hh-27668DiVA, id: diva2:784969
Konferens
Forty-Year Jubilee Symposium of the Finnish Limnological Society: The Dynamics and Use of Lacustrine Ecosystem, Helsinki, Finland, August 6-10, 1990
Anmärkning

Financial support was received from the Swedish Environmental Protection Agency and the Swedish Council for Forestry and Agricultural Research.

Tillgänglig från: 2015-02-01 Skapad: 2015-02-01 Senast uppdaterad: 2017-12-05Bibliografiskt granskad

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Weisner, Stefan E. B.

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