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undergraduate thesis
Koralji i simbiotske alge
Zagreb: University of Zagreb, Faculty of Science, 2019. urn:nbn:hr:217:743790
Matković, Matea
University of Zagreb
Faculty of Science
Department of Biology

Institutional repository: Repository of the Faculty of Science

Cite this document

Matković, M. (2019). Koralji i simbiotske alge (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:743790

Matković, Matea. "Koralji i simbiotske alge." Undergraduate thesis, University of Zagreb, Faculty of Science, 2019. https://urn.nsk.hr/urn:nbn:hr:217:743790

Matković, Matea. "Koralji i simbiotske alge." Undergraduate thesis, University of Zagreb, Faculty of Science, 2019. https://urn.nsk.hr/urn:nbn:hr:217:743790

Matković, M. (2019). 'Koralji i simbiotske alge', Undergraduate thesis, University of Zagreb, Faculty of Science, accessed 25 November 2024, https://urn.nsk.hr/urn:nbn:hr:217:743790

Matković M. Koralji i simbiotske alge [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Science; 2019 [cited 2024 November 25] Available at: https://urn.nsk.hr/urn:nbn:hr:217:743790

M. Matković, "Koralji i simbiotske alge", Undergraduate thesis, University of Zagreb, Faculty of Science, Zagreb, 2019. Available at: https://urn.nsk.hr/urn:nbn:hr:217:743790

Metadata
TitleKoralji i simbiotske alge
Title (english)Koralji i simbiotske alge
AuthorMatea Matković
MentorPetar Kružić (mentor)
GranterUniversity of Zagreb
Faculty of Science
(Department of Biology)
Zagreb
Defense date and country2019, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Biology
Abstract
Grebenotvorni koralji tvore endosimbiozu s dinoflagelatnim algama iz roda Symbiodinium, poznatim i kao zooksantele. Ova simbioza biološka je pokretačka snaga koja je osnova za uspostavu i održavanje ekosustava tropskih koraljnih grebena. Međutim, sve češće su koraljni grebeni globalno bili pod utjecajem fenomena poznatog kao izbjeljivanje koralja koji uključuje ili masovno napuštanje koralja domaćina od strane zooksantela ili gubitak fotosintetskih pigmenata unutar pojedinih zooksantela. Povremeno izbjeljivanje može biti reverzibilno, ali brza smrtnost oslabljenih i/ili bolesnih koralja uobičajena je s ponavljajućim ili intenzivnim događajima izbjeljivanja. Primarni okolišni čimbenik koji izaziva izbjeljivanje koralja su povišene temperature vode koje uzrokuju fiziološki toplinski stres. Ekstremne razine Sunčevog zračenja, uključujući vidljivo i UV zračenje, mogu stvoriti dodatni fiziološki stres za povećanje štetnog utjecaja termičkog izbjeljivanja. Prema oksidativnoj teoriji izbjeljivanja koralja, reaktivni oblici kisika (ROS) nastali djelovanjem oštećenog fotosintetskog aparata u simbiontu istječu u stanicu domaćina gdje nadvladavaju antioksidacijski sustav i oštećuju tkivo domaćina.
Abstract (english)
Reef building corals form an endosymbiosis with dinoflagellates of the genus Symbiodinium, also known as zooxsanthellae. This symbiosis is the biological driving force that underpins the establishment and maintenance of tropical coral reef ecosystems. However, coral reefs have been affected globally by a phenomenon known as coral bleaching, which involves either the massive expulsion of zooxantellae or the loss of photosynthetic pigments within individual zooxanthellae. Occasional bleaching may be reversible, but rapid mortality of weakened and/or diseased corals is common with repetitive or intense bleaching events. The primary environmental factor that causes coral bleaching is elevated water temperatures that cause physiological thermal stress. Extreme levels of solar radiation, including visible and UV radiation, can create additional physiological stress to increase the harmful impact of thermal bleaching. According to the oxidative theory of coral bleaching, reactive oxygen species (ROS) produced through the activity of the damaged photosynthetic apparatus in the symbiont leak to the host cell where it overcomes the antioxidant system and causes damage to the host tissue.
Keywords
Languagecroatian
URN:NBNurn:nbn:hr:217:743790
Study programmeTitle: Environmental Sciences
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) struke znanosti o okolišu (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) struke znanosti o okolišu)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2019-09-26 09:01:11