BIOLOŠKI I KEMIJSKI ODGOVORI POVRŠINSKOG SLOJA MORA NA ATMOSFERSKO TALOŽENJE

doctoral thesis

• Title (english): BIOLOGICAL AND CHEMICAL RESPONSES OF SEA SURFACE LAYER TO ATMOSPHERIC DEPOSITION
• Author: Andrea Milinković
• Mentor: Sanja Frka Milosavljević (mentor)
• Committee member: Zvjezdana Bencetić Klaić (predsjednik povjerenstva)
• Committee member: Slađana Strmečki Kos (član povjerenstva)
• Committee member: Danijela Šantić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2023-10-23, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Interdisciplinary Natural Sciences; Marine Science
• Universal decimal classification (UDC): 55 - Geology. Meteorology. Hydrology

Abstract

Ova interdisciplinarna studija provedena je s ciljem boljeg razumijevanja učinaka atmosferskog taloženja (AT) na kompleksne strukturne i fiziološke odgovore primarno fitoplanktona te posljedično na promjene kemijskih svojstava površinskog sloja mora i obogaćenje površinskog mikrosloja organskom tvari (OT) na granici faza more-atmosfera. Rad obuhvaća ispitivanja: i) promjenjivosti koncentracija, izvora i taložnih tokova atmosferskih sastavnica te utjecaja AT na plankton i kemiju površinskih slojeva mora na obalnom području srednjeg Jadrana; ii) utjecaja taloženja atmosferskog onečišćenja različitih izvora na planktonsku populaciju te promjenu kemijskih svojstava površinskih slojeva mora kroz prvi inkubacijski eksperiment ovakve vrste na Jadranskom moru; iii) mehanizama kojima sastavnice antropogenog AT utječu na fitoplankton na razini vrsta kroz laboratorijska ispitivanja na fitoplanktonskim monokulturama. Dobiveni rezultati ukazuju da AT, unosom hranjivih i toksičnih tvari, mijenja sastav površinskih slojeva mora čime snažno utječe na kompetitivnost, stopu rasta te strukturu obitavajućih planktonskih zajednica. Takve promjene rezultiraju kvalitativnim i kvantitativnim promjenama biogene OT na morskoj površini, koja akumulacijom na granici faza modificira procese izmjene između mora i atmosfere, što može imati značajne posljedice na biogeokemijsko kruženje tvari te klimu općenito.

Abstract (english)

The main aim of this interdisciplinary study is to gain insight into the effects of atmospheric deposition (AD) on complex structural and physiological responses, primarily of phytoplankton communities, and consequently on the chemical properties of sea surface layers, and the organic matter (OM) enrichment in the sea surface microlayer at the sea-atmosphere interface. Several aspects were examined: i) the variability of concentrations, sources, and deposition fluxes of atmospheric constituents and the impact of AD on the plankton population, and the chemistry of the sea surface layers in the central Adriatic coastal area; ii) the impact of ambient AD from diverse sources on the plankton population, and the change in the chemical properties of the sea surface layers through the first incubation experiment of this kind in the Adriatic Sea; iii) the mechanisms by which the specific anthropogenic AD constituents affect phytoplankton at the level of individual species, through laboratory tests on phytoplankton monocultures. The results obtained indicate that AD alters the composition of the sea surface through the addition of nutrients and toxic components, which strongly affects the competitiveness, growth rate, and thus the structure of the inhabiting plankton communities. Such changes ultimately lead to qualitative and quantitative variations in biogenic OM within the sea surface, whose enhanced enrichment at the natural phase boundary alters ocean-atmosphere exchange processes. The results of this thesis imply that the effects of AD on the sea surface could have strong implications for biogeochemical processes and climate in general.

• Keywords: lebdeće čestice; atmosfersko taloženje; površinski mikrosloj mora; fitoplankton; organska tvar; Jadransko more
• Keywords (english): aerosol particles; atmospheric deposition; sea surface microlayer; phytoplankton; organic matter; Adriatic Sea
• Language: croatian
• URN:NBN: urn:nbn:hr:217:424735
• Promotion: 2024
• Project: Number: IP-2018-01-3105; Title: Biokemijski odgovori površinskog sloja oligotrofnog područja Jadranskog mora na atmosfersko taloženje; Acronym: BiREADI; Leader: Sanja Frka Milosavljević; Jurisdiction: Croatia; Funder: Hrvatska zaklada za znanost; Funding stream: Research Projects
• Study programme: Title: DOCTORAL STUDY OF OCEANOLOGY; Study programme type: university; Study level: postgraduate; Academic / professional title: doktor/doktorica znanosti u području prirodnih znanosti (doktor/doktorica znanosti u području prirodnih znanosti)
• Type of resource: Text
• Extent: 237 str. ; 30 cm
• File origin: Born digital
• Access conditions: Embargoed access; Embargo expiration date: 2025-11-01
• Created on: 2025-01-30 12:41:07