Multifactorial effects of warming, low irradiance, and low salinity on Arctic kelps ...

The Arctic is projected to warm by 2 to 5°C by the end of the century. Warming causes melting of glaciers, shrinking of the areas covered by sea ice, and increased terrestrial runoff from snowfields and permafrost thawing. Warming, decreasing coastal underwater irradiance, and lower salinity are pot...

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Bibliographic Details
Main Authors: Lebrun, Anaïs, Miller, Cale A, Meynadier, Marc, Comeau, Steeve, Urrutti, Pierre, Alliouane, Samir, Schlegel, Robert, Gattuso, Jean-Pierre, Gazeau, Frédéric
Format: Article in Journal/Newspaper
Language:unknown
Published: PANGAEA 2024
Subjects:
Arctic
Climate change
kelps
mesocosm experiment
Mesocosm experiment
Arctic Biodiversity & Livelihoods FACE-IT
Arctic biodiversity
Ice
permafrost
Sea ice
Online Access:https://dx.doi.org/10.1594/pangaea.971349
https://doi.pangaea.de/10.1594/PANGAEA.971349
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Summary:The Arctic is projected to warm by 2 to 5°C by the end of the century. Warming causes melting of glaciers, shrinking of the areas covered by sea ice, and increased terrestrial runoff from snowfields and permafrost thawing. Warming, decreasing coastal underwater irradiance, and lower salinity are potentially threatening polar marine organisms, including kelps, that are key species of hard-bottom shallow communities. The present study investigates the physiological responses of four kelp species (Alaria esculenta, Laminaria digitata, Saccharina latissima, and Hedophyllum nigripes) to these environmental changes through a perturbation experiment in ex situ mesocosms. Kelps were exposed for six weeks to four experimental treatments: an unmanipulated control, a warming condition under the CO2 emission scenario SSP5-8.5, and two multifactorial conditions combining warming, low salinity, and low irradiance reproducing the future coastal Arctic exposed to terrestrial runoff under two CO2 emission scenarios (SSP2-4.5 ...

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