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dc.contributor.authorDinasquet, Julie
dc.contributor.authorTitelman, Josefin
dc.contributor.authorMøller, Lene Friis
dc.contributor.authorSetala, Outi
dc.contributor.authorGranhag, Lena M.
dc.contributor.authorAndersen, Thorvin
dc.contributor.authorBåmstedt, Ulf
dc.contributor.authorHaraldsson, Matilda
dc.contributor.authorHosia, Aino
dc.contributor.authorKatajisto, Tarja
dc.contributor.authorKragh, Theis
dc.contributor.authorKuparinen, Jorma
dc.contributor.authorSchrøter, M.-L.
dc.contributor.authorSøndergaard, Morten
dc.contributor.authorTiselius, Peter
dc.contributor.authorRiemann, Lasse
dc.date.accessioned2012-11-16T18:27:05Z
dc.date.issued2012-07-24
dc.identifier.urihttp://hdl.handle.net/11250/109228
dc.description.abstractIncreasing biomasses of gelatinous zooplankton presumably have major implications for the structure and function of marine food webs at large; however, current data on lower trophic levels are scarce, as most studies have focused on the immediate effects on zooplankton and fish larvae only. We examined the short-term impact of larvae and adults of the invasive ctenophore Mnemiopsis leidyi on a summer planktonic food web in the estuarine southern Baltic Sea, with special emphasis on the microbial loop. Grazing by M. leidyi reduced the mesozooplankton biomass, followed by increased dinoflagellate biomass in treatments with M. leidyi. While chlorophyll a increased most in the treatments with M. leidyi, small phytoplankton and ciliates decreased in all treatments. M. leidyi had a slight effect on bacterial abundance, but not on bacterial production, ectoenzymatic activities, or community composition. Undetectable levels of phosphate and a gradual accumulation of dissolved organic carbon during the experiment suggested a malfunctioning microbial loop scenario. The experiment shows that direct and indirect short-term effects of M. leidyi on the estuarine food web are limited to higher trophic levels and indicates that top-down and bottom-up consequences of M. leidyi expansions on the microbial loop will likely depend on local nutrient conditions.no_NO
dc.language.isoengno_NO
dc.publisherInter-Researchno_NO
dc.subjectmarine organismsno_NO
dc.subjectmarine organismerno_NO
dc.subjectplanktonno_NO
dc.titleCascading effects of the ctenophore Mnemiopsis leidyi on the planktonic food web in a nutrient-limited estuarine systemno_NO
dc.typeJournal articleno_NO
dc.typePeer reviewedno_NO
dc.subject.nsiVDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921no_NO
dc.subject.nsiVDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497no_NO
dc.description.embargo2017-07-24
dc.source.pagenumber49-61no_NO
dc.source.volume460no_NO
dc.source.journalMarine Ecology Progress Seriesno_NO
dc.identifier.doihttp://dx.doi.org/10.3354/meps09770


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