Naslov
Changes in the periphytic ciliate community structure under different hydrological conditions in a temperate floodplain lake

Autori
Vlaičević, Barbara

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

Izvornik
Book of Abstracts. 3rd Symposium of Freshwater Biology / Ivković, Marija ; Stanković, Igor ; Matoničkin Kepčija, Renata ; Gračan, Romana - Zagreb : Hrvatsko udruženje slatkovodnih ekologa (HUSEk), 2019, 34-34

Skup
6. simpozij o biologiji slatkih voda (SOBS2019)

Mjesto i datum
Zagreb, Hrvatska, 15.02.2019

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Periphyton ; Ciliophora ; Peritrichia ; Floodplain ; Hydrology

Sažetak
Ciliates represent important component of periphytic communities in aquatic habitats, including river-floodplain ecosystems, particularly as a link between lower and higher trophic levels in food webs. Considering that these assemblages have been poorly studied in floodplain habitats, the aims of this research, conducted in a Danubian floodplain lake (Kopački Rit Nature Park, Croatia), were to identify the main factors controlling periphytic ciliates and to estimate their ecological role in this dynamic ecosystem. The study included two experimental series lasting from spring till winter and from summer till winter in 2010. The glass slides were chosen as artificial substrates for periphyton development. Floods of different intensity and duration characterised the research period and modified the lake water properties. During the flooding, water transparency and nutrient concentrations increased, while conductivity and chlorophyll a concentration decreased. Macrophyte and metaphyton stands spread out within the lake during the high floods and periphyton biomass decreased consequently. In such conditions, the total ciliate abundance in periphyton declined. Peritrichs, sessile filter feeders which utilize suspended prey from the surrounding water, were dominant ciliates in the periphyton, with the highest densities registered in the absence of floods. However, during the extremely high water-levels, the abundance of mobile raptorial and filter- feeding ciliates increased. Bacteria and algae represented the main food source for periphytic ciliates. This study reveals the importance of hydrological regime in shaping periphytic ciliate community and suggests that these organisms have a significant impact on plankton communities in temperate floodplain lakes.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

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