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Title |
The co-distribution of Arctic cod and its seabird predators across the marginal ice zone in Baffin Bay |
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Journal |
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Year |
2019 |
Publication |
Elementa: Science of the Anthropocene |
Abbreviated Journal |
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Volume |
7 |
Issue |
1 |
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1164 |
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ISSN |
2325-1026 |
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yes |
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Serial  |
8121 |
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Author |
Laetitia Dadaglio, Julie Dinasquet, Ingrid Obernosterer, Fabien Joux |
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Title |
Differential responses of bacteria to diatom-derived dissolved organic matter in the Arctic Ocean |
Type |
Journal |
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Year |
2018 |
Publication |
Aquatic microbial ecology |
Abbreviated Journal |
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Volume |
82 |
Issue |
1 |
Pages |
59-72 |
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Keywords |
16S rRNA sequencing Arctic Ocean Bacterial diversity Bacterial growth Biodegradation Diatom-derived organic matter Sea ice |
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Abstract |
The Arctic sea ice cover is undergoing an unprecedented decline due to climate change. This loss may result in the earlier start of ice algae blooms and more intense phytoplankton blooms, leading to higher concentrations of dissolved organic matter (DOM) derived from primary production. We investigated the response of early summer Arctic bacterial communities to the addition of Arctic diatom-derived DOM through biodegradation experiments in Baffin Bay. DOM produced by the planktonic diatom Chaetoceros neogracilis and the sea ice diatom Fragilariopsis cylindrus was added to seawater from 3 stations with different ice cover (2 ice zones and 1 open water zone) for 12 d. At the 3 stations, the addition of inorganic nutrients (PO4 and NO3) was not sufficient to stimulate bacterial growth compared to the controls, suggesting that bacteria were mainly limited by organic carbon. The addition of DOM from C. neogracilis stimulated bacterial abundance and production, with a more pronounced response in the ice zone compared to the open water zone. The enhanced bacterial metabolism was accompanied by changes in the bacterial community composition determined by 16S rRNA sequencing, driven by operational taxonomic units (OTUs) related to Pseudoalteromonas and Polaribacter that increased in relative abundance with DOM addition. Moreover, in the ice zone, DOM from C. neogracilis induced a priming effect on the bacterial utilization of ambient DOM. Our findings suggest that phytoplankton blooms, through the production of labile organic matter, will strongly affect bacterial heterotrophic activity, composition and dissolved organic carbon cycling in the Arctic Ocean. |
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1164 |
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0948-3055, 1616-1564 |
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yes |
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8120 |
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Title |
Reliance of deep-sea benthic macrofauna on ice-derived organic matter highlighted by multiple trophic markers during spring in Baffin Bay, Canadian Arctic |
Type |
Journal |
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Year |
2020 |
Publication |
Elementa: Science of the Anthropocene |
Abbreviated Journal |
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Volume |
8 |
Issue |
1 |
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1164 |
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2325-1026 |
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yes |
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Serial |
8119 |
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Title |
Stress factors resulting from the Arctic vernal sea-ice melt: Impact on the viability of bacterial communities associated with sympagic algae |
Type |
Journal |
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Year |
2020 |
Publication |
Elementa: Science of the Anthropocene |
Abbreviated Journal |
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Volume |
8 |
Issue |
1 |
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1164 |
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2325-1026 |
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yes |
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8118 |
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An update on Inuit perceptions of their changing environment, Qikiqtaaluk (Baffin Island, Nunavut) |
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Journal |
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Year |
2020 |
Publication |
Elementa: Science of the Anthropocene |
Abbreviated Journal |
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Volume |
8 |
Issue |
1 |
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1164 |
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ISSN |
2325-1026 |
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2325-1026 |
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yes |
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Serial |
8117 |
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Title |
Estimates of net community production from multiple approaches surrounding the spring ice-edge bloom in Baffin Bay |
Type |
Journal |
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Year |
2020 |
Publication |
Elementa: Science of the Anthropocene |
Abbreviated Journal |
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Volume |
8 |
Issue |
1 |
Pages |
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1164 |
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2325-1026 |
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yes |
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Serial |
8116 |
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Title |
Environmental drivers of under-ice phytoplankton bloom dynamics in the Arctic Ocean |
Type |
Journal |
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Year |
2020 |
Publication |
Elementa: Science of the Anthropocene |
Abbreviated Journal |
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Volume |
8 |
Issue |
30 |
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Programme |
1164 |
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ISSN |
2325-1026 |
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Approved |
yes |
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Serial |
8115 |
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Author |
Lisa C. Matthes, C. J. Mundy, S. L.-Girard, M. Babin, G. Verin, J. K. Ehn |
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Title |
Spatial Heterogeneity as a Key Variable Influencing Spring-Summer Progression in UVR and PAR Transmission Through Arctic Sea Ice |
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Journal |
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Year |
2020 |
Publication |
Frontiers in Marine Science |
Abbreviated Journal |
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Volume |
7 |
Issue |
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Pages |
183 |
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1164 |
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ISSN |
2296-7745 |
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2296-7745 |
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yes |
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Call Number |
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Serial |
8114 |
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Title |
Contrasting pelagic ecosystem functioning in eastern and western Baffin Bay revealed by trophic network modeling |
Type |
Journal |
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Year |
2020 |
Publication |
Elementa: science of the anthropocene |
Abbreviated Journal |
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Volume |
8 |
Issue |
1 |
Pages |
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1164 |
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2325-1026 |
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yes |
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8113 |
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Author |
Jean-Patrice Robin |
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Report |
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Year |
2018 |
Publication |
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Abbreviated Journal |
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119 |
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yes |
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Call Number |
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Serial |
8112 |
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