BERGE, Jørgen; DAASE, Malin; RENAUD, Paul e.; AMBROSE JR., William g.; DARNIS, Gerald; LAST, Kim s.; LEU, Eva; COHEN, Jonathan h.; JOHNSEN, Geir; MOLINE, Mark a.; COTTIER, Finlo; VARPE, Øystein; SHUNATOVA, Natalia; BAŁAZY, Piotr; MORATA, Nathalie; MASSABUAU, Jean-Charles; FALK-PETERSEN, Stig; KOSOBOKOVA, Ksenia; HOPPE, Clara j. M.; WĘSŁAWSKI, Jan marcin; KUKLIŃSKI, Piotr; LEGEŻYŃSKA, Joanna; NIKISHINA, Daria; CUSA, Marine; KĘDRA, Monika; WŁODARSKA-KOWALCZUK, Maria; VOGEDES, Daniel; CAMUS, Lionel; TRAN, Damien; MICHAUD, Emma; GABRIELSEN, Tove m.; GRANOVITCH, Andrei; GONCHAR, Anya; KRAPP, Rupert; CALLESEN, Trine a.

doi:10.1016/j.cub.2015.08.024

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BERGE, Jørgen
The Arctic University of Norway [Tromsø, Norway] [UiT]
The University Centre in Svalbard [UNIS]

DAASE, Malin
The Arctic University of Norway [Tromsø, Norway] [UiT]

RENAUD, Paul e.
The University Centre in Svalbard [UNIS]
Akvaplan-Niva [Tromsø]

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Article de revue

Ce document a été publié dans

Current Biology - CB. 2015, vol. 25, n° 19, p. 2555-2561

Résumé en anglais

Summary The current understanding of Arctic ecosystems is deeply rooted in the classical view of a bottom-up controlled system with strong physical forcing and seasonality in primary-production regimes. Consequently, the Arctic polar night is commonly disregarded as a time of year when biological activities are reduced to a minimum due to a reduced food supply. Here, based upon a multidisciplinary ecosystem-scale study from the polar night at 79°N, we present an entirely different view. Instead of an ecosystem that has entered a resting state, we document a system with high activity levels and biological interactions across most trophic levels. In some habitats, biological diversity and presence of juvenile stages were elevated in winter months compared to the more productive and sunlit periods. Ultimately, our results suggest a different perspective regarding ecosystem function that will be of importance for future environmental management and decision making, especially at a time when Arctic regions are experiencing accelerated environmental change.< Réduire

Mots clés en anglais

ACL

SEA-ICE COVER

CALANUS-FINMARCHICUS

VERTICAL MIGRATION

BEAUFORT SEA

WAX ESTERS

FOOD WEBS

FJORD

BIOLUMINESCENCE

KONGSFJORDEN

ZOOPLANKTON

URI

https://oskar-bordeaux.fr/handle/20.500.12278/199636

DOI

http://dx.doi.org/10.1016/j.cub.2015.08.024

Projet Européen

DEVelopment Of innovative Tools for understanding marine biodiversity and assessing good Environmental Status

Project ANR

LabexMER Marine Excellence Research: a changing ocean - ANR-10-LABX-0019
Effet des changements climatiques sur le benthos en Arctique

Unités de recherche

EPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805