Naslov
Influence of submerged macrophytes on metazooplankton community – an in situ mesocosm experiment in the eutrophic lake

Autori
Maria Špoljar ; Tvrtko Dražina ; Jelena Fressl ; Jasna Lajtner ; Tea Tomljanović ; Daniel Matulić ; Dora Matijašec ; Ivana Zrinščak ; Biserka Primc

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
WETLANDS 2014 International Conference Wetlands 2014 - Wetlands Biodiversity and Services: tools for the socio-ecological development / Comin, Francesco A. ; Lamana, Adela ; Espanol, Cecilia ; Garcia, Mercedes - Huesca, 2014

Skup
IX European Wetland Conference 6th European Pond cOnservation Network

Mjesto i datum
Huesca, Španjolska, 14.09.2014. - 18.09.2014

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
rotifers; cladocerans; copepods; predation; fish

Sažetak
Submerged macrophytes and top-down control are two of the key factors that determine zooplankton assemblages in shallow lakes. We conducted mesocosm experiment in a shallow, turbid and non-vegetated backwater intended for sport fishing (Sutla River watershed, NW Croatia). We attempted to assess the capacity of submerged macrophytes and fish predation in the lake restoration through altering zooplankton composition. The experiment was run in situ, from July until October, with naturally present communities, using small (BS, 10 mm,  fish) and large (BL, 40 mm, + fish) mesh sizes for basins construction. In four quadrants of each basin, 30 Ceratophyllum demersum stems were added. In both mesocosms, results suggested, a higher species diversity and abundance of metazooplankton in comparison to backwater pelagial. In BL mesocosm, where plankton and macrophytes assemblages were exposed to fish predation, we observed macrophytes depletion and significantly higher abundance of small cladocerans compared to BS. In BS mesocosm, without fish predation, macrophytes retained high density and all metazooplankton groups, protozoans and insect larvae, achieved a higher abundance in comparison to BL, except small cladocerans. Submerged macrophytes and biomanipulation could be important tools for mitigating eutrophication and natural disturbance (i.e. flooding) that can shift ecosystem diversity and stability.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA