Počet záznamů: 1  

Different effects of planktonic invertebrate predators and fish on the plankton community in experimental mesocosms

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    SYSNO ASEP0426957
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevDifferent effects of planktonic invertebrate predators and fish on the plankton community in experimental mesocosms
    Tvůrce(i) Šorf, M. (CZ)
    Brandl, Z. (CZ)
    Znachor, Petr (BC-A) RID, ORCID
    Vašek, Mojmír (BC-A) RID, ORCID
    Zdroj.dok.Annales de Limnologie-International Journal of Limnology - ISSN 0003-4088
    Roč. 50, č. 1 (2014), s. 71-83
    Poč.str.13 s.
    Jazyk dok.eng - angličtina
    Země vyd.FR - Francie
    Klíč. slovapredation ; zooplankton ; perch ; roach ; mesocosms
    Vědní obor RIVDA - Hydrologie a limnologie
    Institucionální podporaBC-A - RVO:60077344
    UT WOS000333071600007
    AnotaceThe impact of fish and cyclopoid copepod predation on zooplankton communities was evaluated using large-volume mesocosms (depth 9.5 m; volume 13 m3) in the Římov reservoir (Czech Republic). Two yearling roach and perch individuals introduced into mesocosms represented the fish treatment, which was compared to cyclopoid copepods (initial abundance of 2 ind.L−1) and a control with no initial addition of predators. Our results clearly support the hypothesis that planktivorous fish feeding leads to the suppression of large-bodied cladocerans. In the presence of fish, the cladoceran community changed from a dominance of large-bodied Daphnia spp. at the beginning to dominance by the smaller Bosmina longirostris at the end of the experiment. Chlorophyll-a concentration and rotifer abundances increased in the absence of daphnids. In the absence of fish, the presence of large-bodied cladocerans resulted in decreasing chlorophyll-a concentration. Although no significant differences were observed between cyclopoid abundances in treatments stocked with cyclopoids and the control, the proportion of large cladocerans clearly showed the effect of the manipulation. The similar trends in both of these treatments did not confirm the importance of cyclopoid predation in our experiment. The overall strong effect of fish over cyclopoid predation suggests the main role of fish predation in the forming of zooplankton communities and in turn impacting phytoplankton biomass in mesocosms.
    PracovištěBiologické centrum (od r. 2006)
    KontaktDana Hypšová, eje@eje.cz, Tel.: 387 775 214
    Rok sběru2015
Počet záznamů: 1