Exploring controls on the timing of the phytoplankton bloom in western Baffin Bay, Canadian Arctic

被引:0
|
作者
Benoit-Gagne, Maxime [1 ,2 ,3 ]
Dutkiewicz, Stephanie [4 ,5 ]
Deschepper, Inge [1 ,2 ,3 ]
Dufresne, Christiane [1 ,2 ,3 ,6 ]
Dumont, Dany [7 ]
Larouche, Raphael [2 ,3 ,8 ]
Memery, Laurent [9 ]
Olivier, Gaetan [9 ]
Maps, Frederic [1 ,2 ]
机构
[1] Univ Laval, Dept Biol, Quebec City, PQ, Canada
[2] Univ Laval Canada, Takuvik Int Res Lab, LRI3376, Quebec City, PQ, Canada
[3] CNRS, Paris, France
[4] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA USA
[5] MIT, Ctr Global Change Sci, Cambridge, MA USA
[6] Inst Maurice Lamontagne Peches & Oceans Canada, Mont Joli, PQ, Canada
[7] Univ Quebec Rimouski UQAR, Inst Sci Mer Rimouski ISMER, Rimouski, PQ, Canada
[8] Univ Laval, Dept Biochem Microbiol & Bioinformat, Quebec City, PQ, Canada
[9] UBO, Lab Sci Environm Marin LEMAR, Inst Univ Europeen Mer IUEM,Technopole Brest Irois, CNRS,IRD,Ifremer, Plouzane, France
来源
ELEMENTA-SCIENCE OF THE ANTHROPOCENE | 2024年 / 12卷 / 01期
基金
加拿大自然科学与工程研究理事会; 加拿大创新基金会;
关键词
Arctic Ocean; Biogeochemical/ecosystem model; Light under sea ice; MITgcm; Phytoplankton blooms; Winter biomass; SEA-ICE BIOGEOCHEMISTRY; GROWTH; OCEAN; LIGHT; MODEL; CARBON; CHLOROPHYLL; RESPONSES; PLANKTON; RATES;
D O I
10.1525/elementa.2024.00008
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In the Arctic Ocean the peak of the phytoplankton bloom occurs around the period of sea ice break-up. Climate change is likely to impact the bloom phenology and its crucial contribution to the production dynamics of Arctic marine ecosystems. Here we explore and quantify controls on the timing of the spring bloom using a one-dimensional biogeochemical/ecosystem model configured for coastal western Baffin Bay. The model reproduces the observations made on the phenology and the assemblage of the phytoplankton community from an ice camp in the region. Using sensitivity experiments, we found that two essential controls on the timing of the spring bloom were the biomass of phytoplankton before bloom initiation and the light under sea ice before sea ice break-up. The level of nitrate before bloom initiation was less important. The bloom peak was delayed up to 20 days if the overwintering phytoplankton biomass was too low. This result highlights the importance of phytoplankton survival mechanisms during polar winter to the pelagic ecosystem of the Arctic Ocean and the spring bloom dynamics.
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页数:23
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