Utjecaj zakiseljavanja mora na morske organizme

undergraduate thesis

• Title (english): The effect of marine acidification on marine organisms
• Author: Ivan Škegro
• Mentor: Petar Kružić (mentor)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2020-07-23, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Oceanski unos antropogenog ugljičnog dioksida (CO2) mijenja kemiju morskih voda u
svjetskim oceanima s posljedicama na morski život. Povišeni parcijalni tlak CO2 (pCO2) uzrokuje
gomilanje zasićenja kalcijevim karbonatom u mnogim regijama, osobito u visokim geogragfskim
širinama i regijama koje se presijecaju s izraženim hipoksičkim zonama.
Sposobnost morskih životinja, što je najvažnije kod pteropodnih mekušaca, foraminifera i nekih
bentoskih beskralješnjaka, da bi stvorili skeletne strukture od CaCO3 izravno su pod utjecajem
kemije CO2 morskih voda. CO2 utječe i na fiziologiju morskih organizama, zbog kiselo-bazne
(ne)ravnoteže i smanjenog transportnog kapaciteta kisika.
Nekoliko studija trenutačnih razina pCO2 ometaju buduću sposobnost predviđanja utjecaja na
dinamiku hranidbene mreže i ostalih procesa ekosustava. Ovdje su predstavljena nova zapažanja,
pregled dostupnih podataka i identificikacija prioriteta za buduća istraživanja, zasnovanih na
regijama, ekosustavima, svojtama i fiziološkim procesima za koje se vjeruje da su najosjetljiviji
na zakiseljavanje oceana. Acidifikacija oceana i sinergistički utjecaji drugih antropogenih
utjecaja pružaju veliki potencijal za širenje (negativnih) promjena u morskim ekosustavima.

Abstract (english)

Oceanic uptake of anthropogenic carbon dioxide (CO2) is altering the seawater chemistry of
the world’s oceans with consequences for marine biota. The elevated partial pressure of CO2
(pCO2) is causing the calcium carbonate saturation horizon to shoal in many regions, particularly
in high latitudes and regions that intersect with pronounced hypoxic zones.
The ability of marine animals, most importantly pteropod mollusks, foraminifera, and some
benthic invertebrates, to produce calcareous skeletal structures is directly affected by seawater
CO2 chemistry. CO2 influences the physiology of marine organisms as well through acid-base
(im)balance and reduced oxygen transport capacity.
The few studies at relevant pCO2 levels impede our ability to predict future impacts on food-web
dynamics and other ecosystem processes. Here we present new observations, review available
data, and identify priorities for future research, based on regions, ecosystems, taxa, and
physiological processes believed to be most vulnerable to ocean acidification. Ocean
acidification and the synergistic impacts of other anthropogenic stressors provide great potential
for widespread (of negative) changes to marine ecosystems.

• Keywords: morske životinje; zakiseljavanje mora
• Language: croatian
• URN:NBN: urn:nbn:hr:217:122837
• Study programme: Title: Ecology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) biologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) biologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2020-07-24 11:37:35