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Maria Jensen, Agnès Baltzer, Chol K., Forwick Matthias, John A. Howe, Katrine Husum. (2017). Land-fjord interaction and the impact os changing sedimentation rate on fjord environments – an integrated study of arctic sediment transport from land to see.
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Sébastien Descamps, Philip Bertrand, Hallvard Strøm, Harald Steen, Jack Kohler, Olivier Chastel. (2019). Atlantification consequences on Svalbard seabirds.
Abstract: Sammendrag I dette studiet har vi sett på sammenhengen mellom oppvarmingen av Svalbard («Atlantifiseringen») og effekten dette har på naeringsvalg og ungeproduksjon hos to av de mest tallrike sjøfuglartene på øygruppen, nemlig alkekonge og krykkje. Vi fant en sammenheng mellom økende sjøtemperatur (og redusert sjøisutbredelse) i Vest-Spitsbergenstrømmen og naeringsvalget hos de to artene. Redusert sjøisutbredelse og/eller varmere sjøvann var assosiert med en lavere andel arktiske arter i dietten. Imidlertid er mekanismene bak disse storskala endringene i temperatur/sjøisutbredelse og naeringsvalg hos sjøfuglene uklare, og det er behov for mer detaljerte studier på en finere skala. Vi fant ingen sammenheng mellom naeringsvalg og ungeproduksjon; en diett bestående av atlantiske arter resulterte ikke i lavere ungeproduksjon enn en diett bestående av arktiske arter. Dette betyr imidlertid ikke at «atlantifiseringen» av Svalbard ikke kan har alvorlige konsekvenser for sjøfuglene på øygruppen, men betyr trolig heller at effekten ikke gjør seg gjeldene gjennom redusert ungeproduksjon. Abstract Our study investigated the relationships between the warming of Svalbard and the diet and reproductive output of two common seabird breeding on Svalbard, the black-legged kittiwake and the little auk. We found some apparent relationships between the ocean warming (and decline in sea-ice extent) at a large spatial scale in the West Spitsbergen current and the diet of these two species. These relationships indicate that a lower sea-ice extent and/or a warmer sea surface temperature are associated with a lower proportion of Arctic prey in seabird diet. The mechanisms linking these large scale environmental changes and the diet of kittiwakes and little auks are unclear, and studies at a finer spatial scale are needed. We did not find any relationship between seabird reproductive output and their diet, and feeding on Atlantic prey does not lead to a lower reproductive success than feeding on Arctic ones. This does not mean that the Atlantification of Svalbard has no detrimental on Svalbard seabirds, but rather that these effects are likely not related to changes in seabird breeding success. 3
Programme: 330
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