Prostorno-vremenska dinamika zajednica dvokrilaca (Diptera, Insecta) u povremenim krškim rijekama Mediterana

master's thesis

• Title (english): Spatio-temporal dynamics of dipteran (Diptera, Insecta) assemblages of intermittent karstic rivers in the Mediterranean
• Author: Lana Židak
• Mentor: Andreja Brigić (mentor)
• Mentor: Marina Vilenica (komentor)
• Committee member: Andreja Brigić (predsjednik povjerenstva)
• Committee member: Marija Ivković (član povjerenstva)
• Committee member: Danijel Orešić (član povjerenstva)
• Committee member: Blanka Cvetko Tešović (član povjerenstva)
• Committee member: Zorica Petrinec (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2023-09-25, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Povremene tekućice su složeni slatkovodni sustavi u kojima voda teče sezonski. Dominantan su tip tekućih slatkovodnih staništa na Zemlji, posebice u polusuhim regijama svijeta. Cilj ovog diplomskog rada je istražiti zajednice dvokrilaca u lotičkoj i lentičkoj fazi triju krških povremenih mediteranskih rijeka na području Hrvatske – Čikole, Krčića i Miljašić Jaruge. Uzorci su sakupljeni pomoću Surber mreže i izmjereni su i fizikalno-kemijski čimbenici vode. Jedinke dvokrilaca su determinirane do razine porodice. Ukupno je zabilježeno devet porodica dvokrilaca u lotičkoj fazi i sedam porodica u lentičkoj fazi. Promjenom hidroloških faza istraživanih povremenih rijeka, došlo je do promjene u vrijednostima fizikalno-kemijskih čimbenika vode, koja je praćena i promjenom parametara zajednica dvokrilaca. U obje hidrološke faze, jedinkama najbrojnija porodica bila je Chironomidae zbog njihove mogućnosti prilagodbe na promjenjive uvjete okoliša. Parametri zajednice dvokrilaca nisu se značajno razlikovali u lotičkoj fazi istraživanih tekućica. No, u rijeci Čikoli zabilježen je najveći broj porodica zbog najveće heterogenosti staništa, dok je najmanji broj porodica i jedinki zabilježen u antropogeno utjecanoj Miljašić Jarugi. Tijekom lentičke faze, značajno najveća brojnost jedinki dvokrilaca zabilježena je u lokvicama rijeke Krčić, vjerojatno zbog najniže temperature i električne provodljivosti vode. U obje hidrološke faze, zajednice dvokrilaca su pozitivno korelirane s temperaturom i električnom provodljivosti vode.

Abstract (english)

Intermittent rivers are complex freshwater ecosystems characterized by seasonal interchange of dry and wet hydrological phases. They are the dominant type of running freshwater habitats, especially in semi-arid regions of the world. The aim of this thesis was to investigate Dipteran assemblages in the lotic and lentic phases of three karst intermittent Mediterranean rivers in Croatia – Čikola, Krčić and Miljašić Jaruga Rivers. Dipteran larvae were sampled with Surber net and physico-chemical water properites were measured. Dipteran specimens were identified to the family level. A total of nine and seven dipteran families was recorded in lotic and lentic phase of the three rivers, respectively. The change of hydrological phases of the studied intermittent rivers resulted in differences in the physico-chemical water properties, followed by changes in the Diptera assemblage parameters. In both hydrological phases, the Chironomidae family was the most abundant due to their adaptability to changing environmental conditions. Dipteran assemblage parameters did not significantly differ among the rivers during their lotic phase. However, in the Čikola River, the highest number of families was recorded due to the highest habitat heterogenity, while the lowest number of families and individuals were observed in the anthropogenically altered Miljašić Jaruga River. During the lentic phase, a significantly higher abundance of dipteran individuals was recorded in the pools of the Krčić River, likely due to the lowest water temperature and electrical conductivity. In both hydrological phases, dipteran assemblages were positively correlated with water temperature and electrical conductivity.

• Keywords: povremene tekućice; raznolikost dvokrilaca; povremena lotička staništa; povremena lentička staništa
• Keywords (english): intermittent rivers; Dipteran diversity; temporary lotic habitats; temporary lentic habitats
• Language: croatian
• URN:NBN: urn:nbn:hr:217:790240
• Project: Number: UIP-2020-02-5385; Title: Prostorno-vremenska varijabilnost kopnenih i vodenih zajednica povremenih tekućica dinarskog krša; Title: Spatio-temporal variability of terrestrial and aquatic communities in intermittent rivers in the Dinaric karst; Acronym: DinDRY; Leader: Andreja Brigić; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: UIP
• Study programme: Title: Environmental Sciences-University graduate programme; Study programme type: university; Study level: graduate; Academic / professional title: sveučilišni/a magistar/magistra struke znanosti o okolišu (sveučilišni/a magistar/magistra struke znanosti o okolišu)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Embargoed access; Embargo expiration date: 2025-09-25
• Created on: 2024-01-15 11:40:10