Naslov
Spatial variabiliy of Diptera assemblages in lotic phase of karst intermittent rivers in the Mediterranean

Autori
Židak, Lana ; Vilenica, Marina ; Rumišek, Mario ; Matoničkin Kepčija, Renata ; Rebrina, Fran ; Brigić, Andreja

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

Izvornik
Book of Abstracts. 4th Symposium on Freshwater Biology. Croatian Association of Freshwater Ecologists, Zagreb, Croatia. / Mičetić Stanković, Vlatka ; Ivković, Marija ; Matoničkin Kepčija, Renata ; Sertić Perić, Mirela ; Miliša, Marko ; Vilenica, Marina - Zagreb : Hrvatsko udruženje slatkovodnih ekologa (HUSEk), 2023, 33-33

Skup
4th Symposium on Freshwater Biology with the international participation

Mjesto i datum
Zagreb, Hrvatska, 21.04.2023

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
True flies ; temporary habitats ; taxa richness ; environmental variables

Sažetak
Intermittent rivers are characterized by periodical flow cessation, and occur mostly in semi-arid regions of the world, such as the Mediterranean. Organisms inhabiting intermittent rivers are exposed to highly variable environmental conditions, mainly due to repeated hydrological changes from the lotic to lentic and terrestrial phases. The aim of this study was to investigate Diptera assemblages of the lotic phase of three karst intermittent Mediterranean rivers in Croatia – the Čikola, Krčić and Miljašić Jaruga Rivers. At each river, Diptera larvae were sampled at three study sites, in four replicates each, and physico-chemical water properties were also measured. Specimens were identified to the family level. A total of nine Diptera families wasrecorded. With eight families, the Čikola River had the highest taxa richness of Diptera due to the greatest habitat heterogeneity. However, this river also had the lowest abundance of dipterans. The Miljašić Jaruga River had the lowest taxa richness with only four families, most likely due to the greatest anthropogenic impact on this river. The opportunist non-biting midges (Chironomidae) were the dominant family in the study area, which can be attributed to their adaptation to diverse and even extreme environmental conditions. The Diptera assemblages showed a positive response to higher water temperatures and conductivity, as well as lower dissolved oxygen concentration in water. In conclusion, our results show that Diptera assemblages in the studied intermittent rivers are influenced by river morphology, microhabitat composition and physicochemical water properties.

Izvorni jezik
Engleski

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