TY - JOUR
T1 - Episodic Arctic CO2 Limitation in the West Svalbard Shelf
AU - Sanz-Martín, Marina
AU - Chierici, Melissa
AU - Mesa, Elena
AU - Carrillo-de-Albornoz, Paloma
AU - Delgado-Huertas, Antonio
AU - Agusti, Susana
AU - Reigstad, Marit
AU - Kristiansen, Svein
AU - Wassmann, Paul F. J.
AU - Duarte, Carlos M.
N1 - KAUST Repository Item: Exported on 2020-04-23
Acknowledgements: We thank the crew of R/V Helmer Hanssen, I. Hendriks, M. Vernet, E. Falk, H. Hodal, and A. Granados for their help. J. Holding and L. Meire for valuable comments and V. Unkefer for improvements to the text. MS-M was supported by a La Caixa Ph. D. fellowship. This study is a contribution to the Carbon Bridge (RCN-226415) project funded by the Norwegian Research Council.
PY - 2018/7/6
Y1 - 2018/7/6
N2 - The European Sector of the Arctic Ocean is characterized by low CO concentrations in seawater during spring and summer, largely due to strong biological uptake driven by extensive plankton blooms in spring. The spring plankton bloom is eventually terminated by nutrient depletion and grazing. However, low CO concentrations in seawater and low atmospheric resupply of CO can cause episodes during which the phytoplankton growth is limited by CO2. Here, we show that gross primary production (GPP) of Arctic plankton communities increases from 32 to 72% on average with CO additions in spring. Enhanced GPP with CO additions occur during episodes of high productivity, low CO concentration and in the presence of dissolved inorganic nutrients. However, during summer the addition of CO supresses planktonic Arctic GPP. Events of CO limitation in spring may contribute to the termination of the Arctic spring plankton blooms. The stimulation of GPP by CO during the spring bloom provides a biotic feedback loop that might influence the global role played by the Arctic Ocean as a CO sink in the future.
AB - The European Sector of the Arctic Ocean is characterized by low CO concentrations in seawater during spring and summer, largely due to strong biological uptake driven by extensive plankton blooms in spring. The spring plankton bloom is eventually terminated by nutrient depletion and grazing. However, low CO concentrations in seawater and low atmospheric resupply of CO can cause episodes during which the phytoplankton growth is limited by CO2. Here, we show that gross primary production (GPP) of Arctic plankton communities increases from 32 to 72% on average with CO additions in spring. Enhanced GPP with CO additions occur during episodes of high productivity, low CO concentration and in the presence of dissolved inorganic nutrients. However, during summer the addition of CO supresses planktonic Arctic GPP. Events of CO limitation in spring may contribute to the termination of the Arctic spring plankton blooms. The stimulation of GPP by CO during the spring bloom provides a biotic feedback loop that might influence the global role played by the Arctic Ocean as a CO sink in the future.
UR - http://hdl.handle.net/10754/631527
UR - https://www.frontiersin.org/articles/10.3389/fmars.2018.00221/full
UR - http://www.scopus.com/inward/record.url?scp=85050349769&partnerID=8YFLogxK
U2 - 10.3389/fmars.2018.00221
DO - 10.3389/fmars.2018.00221
M3 - Article
AN - SCOPUS:85050349769
VL - 5
JO - Frontiers in Marine Science
JF - Frontiers in Marine Science
SN - 2296-7745
IS - JUL
ER -