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Direct and indirect impacts of fish on crustacean zooplankton in experimaental mesocosms

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dc.abstract.enUnderstanding the factors that regulate phytoplankton and zooplankton is an important goal of aquatic ecologists; however, much remains unknown because of complex interactions between phytoplankton, zooplankton, and fish. Zooplankton, in particular cladocerans, can be regulated by bottom–up factors either via food quantity or food quality in terms of polyunsaturated fatty acids (PUFA) or phosphorus (P) contents in phytoplankton. Fish can recycle nutrients and in turn change the PUFA and P contents of algal resources, thus modifying bottom–up regulation. Furthermore, fish can change phytoplankton structure through consumption of cladocerans which selectively graze phytoplankton. We conducted a mesocosm (300 L) experiment to determine how trophic state and fish aected crustacean dynamics. The mesocosms were filled with water containing natural plankton from the eutrophic Lake Jorzec and mesotrophic Lake Majcz (Northeastern Poland), and we manipulated fish presence/absence. We also conducted a complementary life-table experiment to determine how trophic state and fish nonconsumptively aected demographic parameters of the dominant cladocerans in the mesocosms. Small and large cladoceran species responded dierently to food quantity and quality. Small-bodied Ceriodaphnia were regulated mainly by resource concentrations (i.e., food quantity), while large species were limited by PUFAs (i.e., food quality). Fish likely increased food quality in terms of PUFA, primarily eicosapentaenoic acids (EPA), thus providing conditions for more successful development of Daphnia than in the fish-free treatments. Phosphorus in the seston was likely limiting for zooplankton. However, food quality in terms of phosphorus was likely less important than PUFA because zooplankton can accumulate nutrients in their body.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorKarpowicz, Maciej
dc.contributor.authorDzialowski, Andrew
dc.contributor.authorDawidowicz, Piotr
dc.contributor.authorGórniak, Andrzej
dc.contributor.authorGorelysheva, Zoya
dc.contributor.authorStroinov, Yaroslav
dc.contributor.authorFeniova, Irina
dc.contributor.authorSakharova, Ekaterina
dc.contributor.authorGladyshev, Michail I.
dc.contributor.authorSushchik, Nadezhda N.
dc.date.accessioned2024-01-24T21:53:58Z
dc.date.available2024-01-24T21:53:58Z
dc.date.copyright2019-10-07
dc.date.issued2019
dc.description.accesstimeAT_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number2090
dc.description.versionFINAL_PUBLISHED
dc.description.volume11
dc.identifier.doi10.3390/W11102090
dc.identifier.issn2073-4441
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/104934
dc.identifier.weblinkhttps://www.mdpi.com/2073-4441/11/10/2090
dc.languageeng
dc.pbn.affiliationbiological sciences
dc.relation.ispartofWater (Switzerland)
dc.relation.pages1-26
dc.rightsCC-BY
dc.sciencecloudnosend
dc.subject.enzooplankton
dc.subject.enphytoplankton
dc.subject.ennutrients
dc.subject.enpopulation growth rate
dc.subject.ensmall and large cladocerans
dc.subject.enfish effects
dc.subject.enstoichiometric elemental composition
dc.subject.enpolyunsaturated fatty acids
dc.subject.enmesocosm experiments
dc.titleDirect and indirect impacts of fish on crustacean zooplankton in experimaental mesocosms
dc.typeJournalArticle
dspace.entity.typePublication