Sklonost vodenih beskralješnjaka izvorišnog toka rijeke Zrmanje prema mikrostaništima

master's thesis

• Title (english): Microhabitat preferences by aquatic invertebrates in the Zrmanja River springbrook
• Author: Doris Đermek
• Mentor: Sanja Gottstein (mentor)
• Committee member: Sanja Gottstein (predsjednik povjerenstva)
• Committee member: Sandra Radić Brkanac (član povjerenstva)
• Committee member: Jasenka Sremac (član povjerenstva)
• Committee member: Danijel Orešić (član povjerenstva)
• Committee member: Alan Moro (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2017-11-15, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Zajednice krških izvora su jedne od najraznolikijih i kompleksnih sastavnica izvorišnih ekosustava s velikim utjecajem protoka. Tijekom ekoloških istraživanja izvora rijeke Zrmanje tijekom travnja 2016. godine prikupili smo 20 poduzoraka u brzoj i 20 poduzoraka u sporoj struji vode na dominantnim mikrostaništima. Koristeći standardnu metodologiju istraživanja prema AQEM protokolu koristeći ručnu bentos mrežu (veličine oka 200 μm) prikupili smo stalnu i povremenu faunu beskralješnjaka. Pripadnici porodice Chironomidae su bili dominantna fauna, sa najvećim brojem jedinki na mahovini spore struje vode. EPT indeks je pokazao najveći broj EPT svojti u mahovini na makrolitalu i megalitalu brze struje vode. Analizom funkcionalnih hranidbenih skupina smo utvrdili dominantnost detritofaga s pretežno sakupljačima pobiračima unutar skupine dvokrilaca (Chironomidae). Na vrhu hranidbene mreže spore struje vode utvrđeni su pripadnici skupine Plecoptera (Perlidae), dok su u brzoj struji vode na vrhu hranidbene mreže pripadnici skupine Trichoptera (Rhyacophyllidae). Skupina Hydrachnellae kao ključna izvorišna fauna, iako slabo zastupljena, nastanjivala je većinom mikrostaništa spore struje vode na mikrolitalu.

Abstract (english)

Karstic spring communities are the most diverse and complex ecosystem with huge impact of discharge. During the ecological research of macroinvertebrates on the Zrmanja River spring in April 2016 we collected 20 subsamples in the high velocity and 20 subsamples in the low flow velocity of the dominant microhabitats. Using standard methodological procedure according to AQEM by hand net (200 μm mesh size) we collected permanent and temporal invertebrate fauna. The dominant temporal fauna was Chironomidae with the higest number of specimens on the moss supstrate in the low flow velocity. EPT index was showed the highest number of EPT taxa in moss supstrate on the macrolithal and megalithal in the high flow velocity. Analysis of functional feeding groups recorded the dominance of detritophags with prevelance of collector gathers inside of dipterans fauna (Chironomidae). At the top of the food web of the low flow velocity microhabitats was plecopterans (Perlidae) while in the high flow velocity microhabitats at the top of the food web was trichopterans (Rhyacophyllidae). Hydrachnellae as a key spring fauna was inhabited mostly microhabitats with the low flow velocity inside the microlithal.

• Keywords: krški izvor; makroskopski beskralješnjaci; brzina strujanja; substrat; hranidbene mreže
• Keywords (english): karstic spring; macroinvertebreates; flow velocity; substrate; food web
• Language: croatian
• URN:NBN: urn:nbn:hr:217:765703
• Study programme: Title: Enviromental Sciences; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra struke znanosti o okolišu (magistar/magistra struke znanosti o okolišu)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access; Embargo expiration date: 2019-11-15
• Created on: 2018-03-15 12:26:07