Naslov
Longitudinal profile of benthic macroinvertebrate communities of the Mirna River with special emphasis on chironomid larvae

Autori
Zekirovski, Jana ; Dorić, Valentina ; Ivković, Marija ; Mihaljević, Zlatko

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

Izvornik
Book of Abstracts 4th Symposium on Freshwater Biology with the international participation / - , 2023, 54-54

Skup
4. Simpozij o biologiji slatkih voda

Mjesto i datum
Zagreb, Hrvatska, 21.04.2023

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Chironomidae ; Istria ; monitoring ; freshwater

Sažetak
The Mirna River is the longest river in Istria with a length of 53 km. Benthic macroinvertebrates are a community of macroscopically visible aquatic invertebrates that spend most of their lives on and in the bottom of the water body. The objective of this study was to compare the benthic macroinvertebrate composition along the course of the Mirna River. Sampling was conducted once in May 2022 at 3 sites along the Mirna River. Samples were collected using a 25 x 25 cm hand net and stored in 80 % ethanol. Basic physical and chemical parameters were measured at each station. The highest diversity was recorded at the most upstream station, Kamenita Vrata, where 14 taxa of benthic macroinvertebrates were recorded, of which the order Ephemeroptera and the family Chironomidae had the highest abundance. In the sample from the next downstream station, Portonski Most, 10 taxa were detected, with Amphipoda being the most abundant. At the station near the mouth, Dionzijev Most, the lowest diversity was recorded, with 8 taxa, and the Polychaeta group was the most numerous. The highest species richness of chironomids was recorded at the station Kamenita Vrata. Chironomid species Halocladius variabilis (Staeger, 1839), characteristic of salt or brackish water, was recorded only at the station Dionizijev Most. These differences in the composition of benthic macroinvertebrate communities are the result of differences in physical and chemical water properties at the individual stations, and the strongest influence of sea water is manifested in the high conductivity at the Dionizijev Most station.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA