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dc.contributor.advisorLynghammar, Arve
dc.contributor.advisorPecuchet, Laurene
dc.contributor.authorJohansen, Malou Platou
dc.date.accessioned2025-01-30T05:05:20Z
dc.date.available2025-01-30T05:05:20Z
dc.date.issued2024-11-15en
dc.description.abstractTunup Avannaa Kalaallit Nunaanni nuna eqqissisimatitamiippoq nunarsuarmilu nuna eqqissisimatitaq anginerpaajuvoq avannarlersaallunilu. Inunnik tikinneqarsimanera annikilluinnarpoq, tamannalu pinngortitami pissutsinik allanngoriartornernik misissuiffigissallugu immikkut ittumik periarfissanik pilersitsivoq. Misissuinermi TUNU-programmimi umiarsuarni misissuiviusuni R/V Helmer Hanseni R/V Kronprins Haakonilu atorlugit, 2002-mit 2022-mut aalisakkat immap naqqarmiut assigiinngiiaartarnerat, siammasinnerat aammalu piffinni assigiinngissuteqartuni ineriartornerat misissorneqarpoq. Pinngortalerisut kilisaavii atorlugit kangit, immap naqqa (sokkel) immallu itinersaap killinga ( kontinentalskråning) immikkoortinneqarsimapput piffissallu agguarneqarsimallutik: 2002 – 2010 aamma 2013 – 2022. Misissuinerit takutippaat aalisaqatigiit assigiinngiiaarnerat nunani issittumi uumasoqatigiit amerlassusaat appariarsimasoq, aalisakkallu arktisk-borealitut suminngaanneerfeqartut amerleriarsimallutik. Pingaaruteqartumik, assigiinngiiaarneq annertunerulersimasoq takuneqarsinnaavoq. Station-it misissorneqareernikuni takutippaat eqalukkat Boreogadus saida, Arctogadus glacialis-ilu kangiani qaffariarsimasut, tamannalu kissassusermut nillernerusumut attuumassuteqarunarluni. Immap naqqa (sokkel-imi), atlantificeringimit sunnerneqartumi, kissassuseq qaffariarsimavoq aammalu uumasoqatigiit annertusiartorsimallutik, borealiseringimut isumaqarsinnaalluni. Immap itisarnersaap killingani (kontinentalskråningen) misissukkat takutippaat kissassuseq appariarsimasoq aalisakkallu itinerusumut nikerarsimasullutik. Non-metric Multidimensional Scaling-imi misissuinerit takutippaat itissusermi kiassuseq nunallu ungasissusia sunniuteqarlutik aalisakkat agguataarneranut, nassuiaatit taakku takutippaat avatangiisit allanngoriartornerat aammalu kissatsikkiartornerup kingunerisinnaagai.en_US
dc.description.abstractNordøstgrønland, hjemsted for verdens største og nordligste nationalpark, er minimalt påvirket af menneskelig tilstedeværelse og udgør derfor et unikt miljø til at studere klima-drevne økologiske ændringer. Denne specialeopgave undersøgte fordeling og tidsmæssige ændringer i bundfiskearter fra 2002 til 2022 ved brug af data indsamlet under TUNU-programmets togt med R/V Helmer Hansen og R/V Kronprins Haakon. Data blev delt op i katerierne fjord-, sokkel og kontinentalskråning og sammenlignede for to tidsperioder: 2002–2010 og 2013–2022. Resultaterne viser en øget artsdiversitet over tid, hvor den relative andel af arktiske arter er faldet, mens arktisk-boreale arter er øget. Vidt-udbredte arter i optrådte i den sene tidsperiode (2013 – 2022), hvilket antyder forskydninger i samfundssammensætning. Stationer der er blevet fisket flere gange over årene viste øget relativ forekomst af Boreogadus saida og Arctogadus glacialis i fjordene, hvilket korrelerede med lavere temperaturer. Kontinentalsoklen synes at være udsat for “atlantificering”, i det stigende temperaturer og artsrigdom blev påvist. Dette er i tråd med borealiseringstendenser, der også ses andre steder i Arktis. Artssammensætningen på kontinentalkråningen indikerede, at arter migrerede til dybere og køligere vande. Non-metric Multidimensional Scaling-analyse fremhævede dybde, temperatur og afstand-til-kysten som vigtige faktorer for artsfordeling. Disse fund understreger de igangværende økosystemskift i polarområderne og de potentielle implikationer af fortsat opvarmning.en_US
dc.description.abstractNortheast Greenland, home to the world's largest and most northern National Park, remains minimally impacted by human presence, providing a unique environment to study climate-driven ecological changes. This study examined the status, spatial distribution, and temporal shifts in demersal fish species from 2002 to 2022, using data collected during TUNU Programme cruises on the R/V Helmer Hansen and R/V Kronprins Haakon. Sampling, conducted with bottom trawls, later divided stations into fjord, shelf, and slope categories and compared two periods: 2002–2010 and 2013–2022. Results show increased species diversity, with Arctic species' relative abundance declining while Arctic-Boreal species increased. Notably, widely distributed species appeared in the late decade, suggesting community shifts. Revisited locations exhibited increased relative abundance of Boreogadus saida and Arctogadus glacialis in fjords, correlated with lower temperatures. Shelf regions, influenced by Atlantification, showed rising temperatures and species richness, consistent with borealization trends. Slope stations indicated species migrating to deeper, cooler waters. Non-metric Multidimensional Scaling analysis highlighted depth, temperature, and distance-to-coast as key drivers in species distribution. These findings underscore the ecosystem shifts underway in polar regions and the potential implications of continued warming.en_US
dc.identifier.urihttps://hdl.handle.net/10037/36366
dc.language.isoengen_US
dc.publisherUiT Norges arktiske universitetno
dc.publisherUiT The Arctic University of Norwayen
dc.rights.holderCopyright 2024 The Author(s)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.rightsAttribution 4.0 International (CC BY 4.0)en_US
dc.subject.courseIDBIO-3950
dc.subjectNortheast Greenlanden_US
dc.subjectClimate-changeen_US
dc.subjectAtlantificationen_US
dc.subjectBorealizationen_US
dc.subjectEcosystem shiften_US
dc.titleStatus and spatial patterns of demersal marine fish communities in Northeast Greenland in the period 2002 – 2022en_US
dc.typeMaster thesisen
dc.typeMastergradsoppgaveno


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Attribution 4.0 International (CC BY 4.0)
Except where otherwise noted, this item's license is described as Attribution 4.0 International (CC BY 4.0)