Naslov
Macroinvertebrate diversity of a drainage ditch exposed to different anthropogenic pressures

Autori
Vlaičević, Barbara ; Čerba, Dubravka ; Turković Čakalić, Ivana ; Koh, Miran ; Ergović, Viktorija ; Peršić, Vesna

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

Izvornik
Book of abstracts. 3rd Central European Symposium for Aquatic Macroinvertebrate Research. / Rewicz, T. ; Wysocka, A. ; Bącela-Spychalska, K. ; Grabowski, M. ; Hupało, K. - Łódź : Drukarnia Cyfrowa i Wydawnictwo "Piktor" S.C., 2018, 156-156

Skup
3rd Central European Symposium for Aquatic Macroinvertebrate Research (CESAMIR)

Mjesto i datum
Łódź, Poljska, 08.07.2018. - 13.07.2018

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Macrozoobenthos ; biodiversity ; multi-habitat sampling ; drainage channel ; water quality

Sažetak
Drainage ditches are waterbodies characteristic for many lowland agricultural areas, where they remove excess water, thus reducing the flood risk, but can also be used for irrigation. These habitats support highly diverse, although still poorly investigated, biological communities, including benthic macroinvertebrates. Due to high anthropogenic pressure, e.g. nutrient enrichment or pesticide contamination, many drainage ditches are ecologically degraded, resulting in the changes in benthic communities. In this research, carried out in June 2015, we analysed macrozoobenthos using a multi-habitat sampling method at eight sampling sites along a lowland drainage channel in northeast Croatia. Sampled microhabitats included mineral (macrolithal, mesolithal, microlithal, psammal and argyllal) and organic substrates (phytal) which covered more than 5% of the sampling area. Water physicochemical parameters were measured in situ and samples of both, sediment and water, were collected for the laboratory analysis of nutrients, organic matter, heavy metals and bacterial pollution. In total, 22 macroinvertebrate taxonomic groups were recorded belonging to Hydroida, Turbellaria, Bivalvia, Gastropoda, Hirudinomorpha, Oligochaeta, Hydrachnidia, Araneae, Isopoda, Amphipoda, Mysida, Collembola, Chironomidae, Diptera (excluding Chironomidae), Coleoptera, Ephemeroptera, Heteroptera, Megaloptera, Odonata and Trichoptera. The most abundant representatives were Chironomidae (73% of total abundance) and Oligochaeta (9% of total abundance), indicating poor water quality and organic enrichment at several sampling locations. Grouping of the sampling sites in the non-metric multidimensional scaling analysis suggests differences of benthos diversity and abundance, reflecting the ecological state at research sites. At the anthropogenically most disturbed sites, characterised by higher concentrations of heavy metals and organic carbon in the sediment and a higher number of faecal coliforms in water, the highest abundance of Chironomidae and Oligochaeta was found. These sites were characterised by the chironomid larvae whose bodies were intensively red coloured, what is characteristic of deficient oxygen concentrations. Also, the colour, texture and smell of the sediment indicated the organic pollution. At sites with more developed macrophyte stands, a higher macroinvertebrate diversity and a higher abundance of taxa were recorded, showing better ecological state and water quality. Our results indicate the possible existence of the point source of pollution in this area, leading to an excessive input of the organic and inorganic substances in the local drainage channels. Therefore, the utilisation of this water for irrigation or similar purposes would not be recommended.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA