Multi-decadal environmental change in the Barents Sea recorded by seal teeth

© 2022 The Authors. Global Change Biology published by John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 28(2022), 9 vom: 07. Mai, Seite 3054-3065
1. Verfasser: de la Vega, Camille (VerfasserIn)
Weitere Verfasser: Buchanan, Pearse J, Tagliabue, Alessandro, Hopkins, Joanne E, Jeffreys, Rachel M, Frie, Anne Kirstine, Biuw, Martin, Kershaw, Joanna, Grecian, James, Norman, Louisa, Smout, Sophie, Haug, Tore, Mahaffey, Claire
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2022
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article Arctic Atlantification atmospheric nitrogen deposition, harp seal stable nitrogen isotopes
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520 |a Multiple environmental forcings, such as warming and changes in ocean circulation and nutrient supply, are affecting the base of Arctic marine ecosystems, with cascading effects on the entire food web through bottom-up control. Stable nitrogen isotopes (δ15 N) can be used to detect and unravel the impact of these forcings on this unique ecosystem, if the many processes that affect the δ15 N values are constrained. Combining unique 60-year records from compound specific δ15 N biomarkers on harp seal teeth alongside state-of-the-art ocean modelling, we observed a significant decline in the δ15 N values at the base of the Barents Sea food web from 1951 to 2012. This strong and persistent decadal trend emerges due to the combination of anthropogenic atmospheric nitrogen deposition in the Atlantic, increased northward transport of Atlantic water through Arctic gateways and local feedbacks from increasing Arctic primary production. Our results suggest that the Arctic ecosystem has been responding to anthropogenically induced local and remote drivers, linked to changing ocean biology, chemistry and physics, for at least 60 years. Accounting for these trends in δ15 N values at the base of the food web is essential to accurately detect ecosystem restructuring in this rapidly changing environment 
650 4 |a Journal Article 
650 4 |a Arctic 
650 4 |a Atlantification 
650 4 |a atmospheric nitrogen deposition, harp seal 
650 4 |a stable nitrogen isotopes 
700 1 |a Buchanan, Pearse J  |e verfasserin  |4 aut 
700 1 |a Tagliabue, Alessandro  |e verfasserin  |4 aut 
700 1 |a Hopkins, Joanne E  |e verfasserin  |4 aut 
700 1 |a Jeffreys, Rachel M  |e verfasserin  |4 aut 
700 1 |a Frie, Anne Kirstine  |e verfasserin  |4 aut 
700 1 |a Biuw, Martin  |e verfasserin  |4 aut 
700 1 |a Kershaw, Joanna  |e verfasserin  |4 aut 
700 1 |a Grecian, James  |e verfasserin  |4 aut 
700 1 |a Norman, Louisa  |e verfasserin  |4 aut 
700 1 |a Smout, Sophie  |e verfasserin  |4 aut 
700 1 |a Haug, Tore  |e verfasserin  |4 aut 
700 1 |a Mahaffey, Claire  |e verfasserin  |4 aut 
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