Utjecaj umjetnog svjetla noću na zajednice sesilnih beskralježnjaka na tvrdoj podlozi

master's thesis

• Title (english): Influence of artificial light at night on communities of sessile invertebrates on hard substratum
• Author: Oliver Barić
• Mentor: Ana Gavrilović (mentor)
• Committee member: Ana Gavrilović (predsjednik povjerenstva)
• Committee member: Tea Tomljanović (član povjerenstva)
• Committee member: Daniel Matulić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Department of Fisheries, Beekeeping, Game Management and Special Zoology); Zagreb
• Defense date and country: 2024-07-08, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Do sada je poznat utjecaj umjetnog svjetla noću na pojedine vrste morskih organizama, no
utjecaj na razini njihovih zajednica vrlo je slabo istražen. Utvrđivanje ovih promjena, posebno
na razini zajednica sesilnih beskralježnjaka presudno je za razumijevanje temeljnih fizioloških
mehanizama i donošenje efikasnih mjera u gospodarenju obalnim prostorom. Stoga je cilj ovog
istraživanja bio utvrditi promjene u sastavu, bioraznolikosti i biomasi zajednica sesilnih
beskralježnjaka na tvrdoj podlozi uzrokovanih umjetnim žutim svjetlom noću kroz tri mjeseca.
Uzorkovanje je obavljano jednom mjesečno. Utvrđene su statistički značajne razlike u sastavu
zajednica pri prva dva uzorkovanja. Indeks bogatstva vrsta i Shannon indeks su bili statistički
značajno veći u zajednicama izloženim umjetnom svjetlu noću. Mokra biomasa je pri prvom
uzorkovanju bila statistički značajno veća u zajednicama koje nisu bile izložene umjetnom
svjetlu noću pri prvom uzorkovanju, dok se pri drugom i trećem nije značajno razlikovala. Suha
masa je bila statistički značajno veća u zajednicama izloženim umjetnom svjetlu noću. Ako se
rezultati ovog istraživanja usporede s rezultatima istraživanja provedenog istovremeno na istom
lokalitetu, ali s korištenim bijelim LED svjetlom, može se zaključiti da je bijela LED svjetlost imala
štetniji utjecaj na bioraznolikost promatranih zajednica.

Abstract (english)

The influence of artificial light at night (ALAN) is investigated for single species, but it has been
poorly researched on community level. The determination of these changes, especially in
communities of sessile invertebrates, is crucial for understanding the underlying mechanisms
and efficient coastal area management. Therefore, the aim of this research was to determine
the changes in composition, biodiversity and biomass in communities of sessile invertebrates
on hard substratum caused by exposure to ALAN for three months. The communities were
sampled monthly. Statistically significant differences in community composition were recorded
in the first and second sampling. Species richness and Shannon index were significantly higher
in communities exposed to ALAN. Wet biomass was significantly bigger in the first sampling in
communities that were not exposed to ALAN and in the second and third sampling, no
statistically significant differences were found. Dry biomass was significantly bigger in
communities exposed to ALAN. If the results of this research are compared to results of a
research that was done at the same time and place with the same methodology, but white LED
light was used instead of yellow, it can be concluded that white light had a more negative effect
on biodiversity.

• Keywords: Svjetlosno zagađenje; sesilni beskralježnjaci; bioraznolikost; sastav zajednica; biomasa
• Keywords (english): Light pollution; sessile invertebrates; biodiversity; community composition; biomass
• Language: croatian
• URN:NBN: urn:nbn:hr:204:064644
• Study programme: Title: Fisheries and Game Management; Study programme type: university; Study level: graduate; Academic / professional title: magistar/ magistra inženjer/inženjerka ribarstva i lovstva (magistar/ magistra inženjer/inženjerka ribarstva i lovstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-07-25 08:55:46