Unexpected Levels of Biological Activity during the Polar Night Offer New Perspectives on a Warming Arctic

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 ac...

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Bibliographic Details
Published in:Current Biology
Main Authors: 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.
Format: Article in Journal/Newspaper
Language:English
Published: 2015
Subjects:
ACL
SEA-ICE COVER
CALANUS-FINMARCHICUS
VERTICAL MIGRATION
BEAUFORT SEA
WAX ESTERS
FOOD WEBS
FJORD
BIOLUMINESCENCE
KONGSFJORDEN
ZOOPLANKTON
Sciences de l'environnement/Biodiversité et Ecologie
Arctic
Arctique*
Beaufort Sea
Calanus finmarchicus
Kongsfjord*
Kongsfjorden
polar night
Sea ice
Zooplankton
Online Access:https://oskar-bordeaux.fr/handle/20.500.12278/199636
https://hdl.handle.net/20.500.12278/199636
https://doi.org/10.1016/j.cub.2015.08.024
Description
Summary: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. LabexMER Marine Excellence Research: a changing ocean Effet des changements climatiques sur le benthos en Arctique DEVelopment Of innovative Tools for understanding marine biodiversity and assessing good Environmental Status

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