Naslov
Siltation in Croatian rivers based on Diatom Siltation Index

Autori
Žižić Nakić, Antonija ; Miličić, Maja ; Stanković, Igor

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

Izvornik
Book of abstracts - 6th Balkan Botanical Congress / Bogdanović, Sandro ; Jogan, Nejc - Rijeka : Correctus media d.o.o., Zagreb, 2015, 126-127

ISBN
978-953-99774-9-6

Skup
6th Balkan Botanical Congress

Mjesto i datum
Rijeka, Hrvatska, 14.09.2015. - 18.09.2015

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Siltation

Sažetak
Diatom Siltation Index (DSI) calculated as percentage of motile diatoms (Navicula spp., Nitzschia spp., Cylindrotheca spp. and Surirella spp.) was tested on 338 samples from Croatian Water Diatom database. Samples were collected and analyzed in period between 2010 and 2015. Diatoms were collected on sampling sites designated by Croatian national monitoring program. Typology concept was used to distinguish different siltation rates indicated by DSI. Values of DSI were analyzed on all sampling sites grouped according to ecoregion, catchment area, altitude, substrate type and weather they belong to spring area or lower river sections. DSI was low on all spring area sampling sites, no matter the ecoregion, catchment area, altitude or substrate type while it showed interesting differences in lower river sections with regards to grouping factor. Ecoregion concept showed that DSI was higher in Pannonian than in Dinaric Ecoregion. Differences in ecoregions also influenced on DSI values distribution grouped by catchment area. Results showed that DSI was higher in small, medium and very large rivers while it was unexpectedly lower in large rivers. That can be explained with the fact that 2/3 of sampling sites on large rivers are situated in Dinaric Ecoregion where siltation rate is generally low. DSI values grouped by substrate type and altitude showed that DSI was highest on silicate substrate and in lowland rivers, respectively. Results of this investigation indicate that DSI was proven as good tool for siltation overview in all types of rivers.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA