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Looking for general trends in trophic interactions among estuarine micro- and mesozooplankton

Azémar, Frédéric and Boulêtreau, Stéphanie and Lionard, Marie and Muylaert, Koenraad and Vyverman, Wim and Meire, Patrick and Tackx, Micky Looking for general trends in trophic interactions among estuarine micro- and mesozooplankton. (2007) Journal of Plankton Research, 29 (S1). i135-i147. ISSN 0142-7873

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Official URL: http://dx.doi.org/10.1093/plankt/fbl072

Abstract

Trophic interactions among micro- and mesozooplankton were investigated in the Schelde estuary. Field populations of plankton were separated by selective filtrations (30 and 200 mm). Predation was measured by comparing ciliate and rotifer abundance in treatments with and without potential predators (cladocerans, cyclopids, the calanoid Eurytemora affinis and rotifers). To deal with variability in the data, a cross-calculation method using all replicates separately is proposed. In order to look for general trends in predation behaviour, the predation rates were ranked and analysed in relation to ranked characteristics of the potential prey: numerical abundance, growth rate, individual and population biomass. Cyclopids fed selectively on the ciliates having the highest population biomass and growth rates among the ciliate population. Cyclopids selected the least abundant rotifers. No trends were detected for cladocerans and E. affinis. As predators, rotifers selected the least abundant ciliates in spring. Although no general selectivity patterns for the predators studied can be drawn yet, the potential of the method employed is illustrated and discussed. Its main advantage is the possibility to extend the obtained data set with data from new experiments as well as with extant data on selectivity of the predators.

Item Type:Article
Additional Information:Thanks to Oxford University Press editor. The original PDF of the article can be found at Journal of Plankton Research website : http://plankt.oxfordjournals.org/
HAL Id:hal-00991465
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Universiteit Gent - UGENT (BELGIUM)
Other partners > Universiteit Antwerpen - UA (BELGIUM)
Other partners > Katholieke Universiteit Leuven - KU LEUVEN (BELGIUM)
Laboratory name:
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Deposited By: Frédéric Azémar
Deposited On:15 May 2014 11:30

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