prikaz prve stranice dokumenta Impact of gelatinous zooplankton on carbon circulation in the Western Baltic Sea ecosystem
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master's thesis
Impact of gelatinous zooplankton on carbon circulation in the Western Baltic Sea ecosystem
2022. urn:nbn:hr:226:075975
Radoš, Nikolina
University of Split
University Department of Marine Studies

Cite this document

Radoš, N. (2022). Impact of gelatinous zooplankton on carbon circulation in the Western Baltic Sea ecosystem (Master's thesis). Split: University of Split. Retrieved from https://urn.nsk.hr/urn:nbn:hr:226:075975

Radoš, Nikolina. "Impact of gelatinous zooplankton on carbon circulation in the Western Baltic Sea ecosystem." Master's thesis, University of Split, 2022. https://urn.nsk.hr/urn:nbn:hr:226:075975

Radoš, Nikolina. "Impact of gelatinous zooplankton on carbon circulation in the Western Baltic Sea ecosystem." Master's thesis, University of Split, 2022. https://urn.nsk.hr/urn:nbn:hr:226:075975

Radoš, N. (2022). 'Impact of gelatinous zooplankton on carbon circulation in the Western Baltic Sea ecosystem', Master's thesis, University of Split, accessed 13 April 2025, https://urn.nsk.hr/urn:nbn:hr:226:075975

Radoš N. Impact of gelatinous zooplankton on carbon circulation in the Western Baltic Sea ecosystem [Master's thesis]. Split: University of Split; 2022 [cited 2025 April 13] Available at: https://urn.nsk.hr/urn:nbn:hr:226:075975

N. Radoš, "Impact of gelatinous zooplankton on carbon circulation in the Western Baltic Sea ecosystem", Master's thesis, University of Split, Split, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:226:075975

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Metadata
TitleImpact of gelatinous zooplankton on carbon circulation in the Western Baltic Sea ecosystem
Title (croatian)Utjecaj želatinoznog zooplanktona na cirkulaciju ugljika u ekosustavu zapadnog Baltičkog mora
AuthorNikolina Radoš
MentorŽeljka Trumbić (mentor)
MentorMarco Scotti (komentor)
Committee memberSvjetlana Krstulović Šifner (predsjednik povjerenstva)
Committee memberŽeljka Trumbić (član povjerenstva)
Committee memberMarco Scotti (član povjerenstva)
GranterUniversity of Split
(University Department of Marine Studies)
Split
Defense date and country2022-07-18, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Agronomy
Abstract
There is a growing interest in better understanding of the trophic role played by jellyfish in marine ecosystems, especially due to their rapid growth rates and potential to profit from advantageous conditions created by climate change. When jellyfish are present in high abundance, their blooms may shunt substantial amounts of carbon from the classical grazing chain towards the microbial loop. Jellyfish act as competitors and predators of forage fish, thus representing a threat to the abundance of high commercial interest stocks. The goal of the study was to investigate the extent of jellyfish feeding over fish larvae and the intensity of their competition with forage fish in the Western Baltic Sea. To do so, an existing Ecopath with Ecosim (EwE) model was updated to consider explicitly changes in the biomass of jellyfish. Novel data on jellyfish abundance and biomass during the period 1994-2022 was gathered from various sources such as scientific literature and public data sets. These data served for calibrating the new EwE model. Predictions about future scenarios up to 2100 were obtained through simulations executed with the new EwE model to account for the potential increase in jellyfish biomass under the prospected scenarios of climate change. The work shows that the already depleted stock of herring in the Western Baltic Sea is susceptible to being replaced by a growing abundance of jellyfish, thus resulting in a regime shift.
Abstract (croatian)
Sve je veći interes za bolje razumijevanje trofičke uloge koju želatinozni zooplankton ima u morskim ekosustavima, posebno zbog brze stope rasta ove skupine organizama i potencijala za razmnožavanje u uvjetima stvorenim zbog klimatskih promjena. Kada su meduze i rebraši (želatinozni zooplankton) prisutni u velikom broju, njihova najezda može preusmjeriti znatne količine ugljika iz klasičnog lanca prema mikrobnoj petlji. Meduze i rebraši su konkurenti i grabežljivci male pelagičke ribe, te kao takvi predstavljaju prijetnju za stokove visokog komercijalnog značaja. Cilj ovog diplomskog rada je istražiti opseg hranjenja želatinoznog zooplanktona ličinkama riba i intenzitet njihove kompeticije s malom plavom ribom u zapadnom Baltičkom moru. U tu svrhu ažuriran je postojeći model Ecopath s Ecosimom (EwE) kako bi se uvidjele promjene u biomasi meduza i rebraša. Novi podaci o brojnosti i biomasi ove skupine za razdoblje od 1994.-2022. prikupljeni su iz različitih izvora kao što su znanstvena literatura i javni skupovi podataka. Ovi su podaci poslužili za kalibraciju novog EwE modela. Predviđanja o budućim scenarijima do 2100. dobivena su simulacijama provedenima s novim EwE modelom kako bi se uzela u obzir potencijalno povećanje biomase prema očekivanim scenarijima klimatskih promjena. Rad pokazuje da su već iscrpljeni stokovi haringe u zapadnom Baltičkom moru podložni promjenama zbog rastućeg broja meduza i rebraša, što rezultira promjenama u strukturi i funkciji ekosustava.
Keywords
Keywords (english)
Languageenglish
URN:NBNurn:nbn:hr:226:075975
Study programmeTitle: Marine Fishery
Study programme type: university
Study level: graduate
Academic / professional title: magistar/ magistra inženjer/inženjerka morskog ribarstva (magistar/ magistra inženjer/inženjerka morskog ribarstva)
Type of resourceText
File originBorn digital
Access conditionsAccess restricted to students and staff of home institution
Terms of useLicence In copyright icon
Created on2023-02-25 11:06:25