Utjecaj eksperimentalne eutrofikacije na makrozoobentos u sedrotvornom sustavu Plitvičkih jezera

doctoral thesis

• Title (english): Influence of experimental eutrophication on macrozoobenthos in tufa depositing system of Plitvice Lakes
• Author: Maja Vurnek
• Mentor: Renata Matoničkin Kepčija (mentor)
• Committee member: Marija Gligora Udovič (predsjednik povjerenstva)
• Committee member: Ines Radanović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2018, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology
• Universal decimal classification (UDC): 57 - Biological sciences. Physical anthropology. Biodiversity

Abstract

Plitvička jezera predstavljaju jedinstveni slatkovodni kaskadni sustav jezera odijeljenih sedrenim barijerama. U ovom radu istražen je utjecaj modificiranih podloga koje otpuštaju hranjive soli dušika (N) i fosfora (P) na makrozoobentos, klorofil a i količinu sedre. Replikatne podloge postavljene su u Nacionalnom parku Plitvička jezera na izlaznim sedrenim barijerama Gradinskog jezera (GJ) i Novakovića brod (NB) u svakom godišnjem dobu tijekom 2015. godine. Vrijednosti fizikalno-kemijskih i hidroloških pokazatelja lotičkih biotopa razlikuju se između barijera uz značajne razlike po godišnjim dobima. Intenzivnije osedravanje zabilježeno je na barijeri NB u odnosu na GJ. Fosfor se izdvojio kao limitirajući čimbenik za primarnu proizvodnju. Povišene koncentracije klorofila a zabilježene su na barijeri GJ i na mikrolokacijama bez makrovegetacije, a istu dinamiku pratila je i povišena brojnost i broj svojti makrozoobentosa te povišena brojnost hranidbenih skupina strugača i detritivora-sakupljača. Brojnost makrozoobentosa povišena je na podlogama s dodanim hranjivim solima fosfora.

Abstract (english)

Plitvice lakes represent the unique freshwater cascading system of lakes divided by tufa barriers. This thesis investigates the influence of nutrient diffusing substrates that release nitrogen (N) and phosphorus (P) on macrozoobenthos, chlorophyll a and tufa deposition. Replicate substrates were placed in the Plitvice Lakes National Park on the tufa barriers of Gradinsko jezero lake outlet (GJ) and Novakovića brod lake outlet (NB) in every season during 2015. The values of the physico-chemical and hydrological indicators on lotic biotopes were different between barriers with significant differences between seasons. Higher tufa deposition was recorded on the NB barrier compared to GJ barrier. Phosphorus was the limiting factor for primary production. Higher concentrations of chlorophyll a were recorded on the GJ barrier and at microlocations without macrovegetation, followed by the same dynamic in higher abundance and number of macrozoobenthic taxa and feeding groups of scrapers and detritvores-collectors. The abundance of macrozoobenthos was higher on the substrates with added phosphorus.

• Keywords: sedrene barijere; modificirane podloge; hranjive soli; osedravanje; primarna proizvodnja; funkcionalne hranidbene skupine
• Keywords (english): tufa barriers; modified substrates; nutrients; tufa deposition; primary production; functional feeding groups
• Language: croatian
• URN:NBN: urn:nbn:hr:217:419244
• Study programme: Title: Biology; Study programme type: university; Study level: postgraduate; Academic / professional title: doktor/doktorica znanosti, područje prirodnih znanosti, polje biologija (doktor/doktorica znanosti, područje prirodnih znanosti, polje biologija)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access; Embargo expiration date: 2020-03-01
• Created on: 2018-04-06 10:54:52