Open WL Archief (OWA)

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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

Dit archief wordt uitgebouwd en beheerd volgens de principes van de Open Access Movement, en het daaruit ontstane Open Archives Initiative.

Basisinformatie over ‘Open Access to scholarly information'.

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Turbulence and the microbial food web: effects on bacterial losses to predation and on community structure Peters, F.; Marrasé, C.; Havskum, H.; Rassoulzadegan, F.; Dolan, J.R.; Alcaraz, M.; Gasol, J.M. (2002). Turbulence and the microbial food web: effects on bacterial losses to predation and on community structure. J. Plankton Res. 24(4): 321-331 In: Journal of Plankton Research. Oxford University Press: New York,. ISSN 0142-7873; e-ISSN 1464-3774, meer

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Beschikbaar in	Auteurs
VLIZ: Open access 58747 [ download pdf ]

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Trefwoorden

Aquatic communities > Plankton Food webs Interspecific relationships > Predation Microorganisms > Bacteria Trophic levels Turbulence

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Auteurs		Top
Peters, F. Marrasé, C. Havskum, H. Rassoulzadegan, F., meer	Dolan, J.R., meer Alcaraz, M. Gasol, J.M., meer

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Abstract

Changes in picoplankton population abundance and growth under turbulence have been suggested to be the consequence of turbulence affecting larger trophic levels and hence the grazing pressure. We designed a laboratory set-up to assess the effects of turbulence on plankton assemblages, and tested the degree of food-web complexity needed to produce cascading effects on picoplankton and the interactions with nutrient enrichment. Grazing pressure on bacteria was relaxed under turbulence and we show that one trophic link is enough to produce effects at the picoplankton level. Nutrient enrichment increased the effect of turbulence as there was more biomass to act upon. The organisms responsible for driving the grazing pressure shifts could not be identified since they seemed to change depending on initial conditions and experimental treatment. A trend of increased heterotrophic biomass under turbulence was found in all cases, which can have important implications in community metabolism dynamics.

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