Oporavak zajednice makrozoobentosa u obnovljenim tokovima Krke nakon uklanjanja invazivne biljne vrste Ailanthus altissima

master's thesis

• Title (english): Macroinvertebrate community recovery in the revitalized channels of Krka River after the removal of invasive plant species Ailanthus altissima
• Author: Martina Maruna
• Mentor: Marko Miliša (mentor)
• Committee member: Marko Miliša (predsjednik povjerenstva)
• Committee member: Ines Radanović (član povjerenstva)
• Committee member: Nenad Judaš (član povjerenstva)
• Committee member: Draginja Mrvoš-Sermek (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2024-07-17, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

U Nacionalnom parku Krka zamijećeno je izraţeno širenje invazivne vrste pajasena
(Ailanthus altissima) koje je uzrokovalo mjestimiĉnu izmjenu sporednih tokova rijeke Krke.
U sklopu projekta za suzbijanje pajasena, jedinke invazivne flore su uklonjene na pokusnoj
plohi i obnovljeni su presušeni tokovi. Time je poĉela i rekolonizacija akvatiĉkih zajednica.
Tijekom 2017. i 2018. godine provela sam istraţivanje u trajanju 13 mjeseci o oporavku
makrozoobentosa te fizikalno-kemijskom stanju vode na pokusnoj plohi. Istraţivaĉke postaje
su bile: kontrolna lokacija u neprekinutom toku i ĉetiri lokacije u nanovo naplavljenim
tokovima. Uzorke bentala uzimala sam kruţnim jezgrilom. Fizikalno-kemijski parametri vode
mjereni su na licu mjesta ili u laboratoriju. Sveukupno je izolirano 17 taksonomskih skupina
makrozoobentosa u kojima su dominirale liĉinke vodenih kukaca. Mjerenja fizikalnokemijskih parametara vode pokazala su oĉekivane sezonske promjene i podjednake uvjete na
svim postajama. Izraĉunom Sørensenovog indeksa sliĉnosti, dokazana je velika sliĉnost
sastava zajednica kontrolne i ostalih lokacija. Najveća gustoća makrozoobentosa bila je na
lokacijama 2 i 3 koje su najbliţe kontrolnoj lokaciji. Raznolikost makrozoobentosa sliĉna
kontrolnoj lokaciji uspostavljena je otprilike 3 mjeseca nakon obnove tokova. Primarno su
obnovljene tokove kolonizirali maloĉetinaši, mušice svrbljivice i trzalci. Vodencvjetovi, tulari
i komarĉići kolonizirali su nanovo naplavljene tokove mjesecima nakon prethodno navedenih
skupina.

Abstract (english)

Spread of the invasive species Ailanthus altissima was observed in the Krka National Park
causing local changes in the Krka River side-streams. As part of the spreading control project,
invasive plants were removed from the experimental plot, dried streams were restored and
recolonization of aquatic communities started. I conducted a research on the recovery of
macroinvertebrate community and the physico-chemical state of water in that area lasting for
13 months in 2017-2018. The research stations were: control location in uninterrupted stream
and four locations in newly flooded streams. I took benthal samples with a circular corer.
Physico-chemical parameters of water were measured on site or in the laboratory. In total, 17
taxonomic groups of macroinvertebrates were isolated, mostly larvae of aquatic insects. Water
physico-chemical parameters measurements showed expected seasonal changes and same
conditions at all locations. Sørensen's index of similarity calculation proved similar
composition of the communities among all tested locations. Locations 2 and 3 (closest to the
control location) showed the highest density of macroinvertebrates. Macroinvertebrate
diversity similar to the control site was established after approximately 3 months. Newly
flooded streams were firstly colonized by worms, non-biting midges and blackflies. Mayflies,
caddisflies and biting midges colonized them months after.

• Keywords: terestrifikacija; rekolonizacija; makrobeskralješnjaci; kakvoća vode
• Keywords (english): terrestrification; recolonization; macroinvertebrates; water quality
• Language: croatian
• URN:NBN: urn:nbn:hr:217:353176
• Project: Number: OS-JN-08/19; Title: Utjecaj uklanjanja drvenaste vegetacije na ekosustave sedrenih barijera - analize makrozoobentosa i fitobentosa; Title: Effect of the inclusion of students' investigative experiments in secondary school physics teaching on the development of scientific reasoning and conceptual understanding; Leader: Marko Miliša; Jurisdiction: Croatia; Funder: Nacionalni park Plitvička jezera; Funding stream: Research Projects
• Study programme: Title: Biology and Chemistry Education-University integrated undergraduate and graduate programme; specializations in: Biology; Course: Biology; Study programme type: university; Study level: integrated undergraduate and graduate; Academic / professional title: sveučilišni/a magistar/magistra edukacije biologije i kemije (sveučilišni/a magistar/magistra edukacije biologije i kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-08-26 13:12:10