Carbon and nitrogen turnover in the Arctic deep sea: in situ benthic community response to diatom and coccolithophorid phytodetritus

Braeckman, Ulrike; Janssen, Felix; Lavik, Gaute; Elvert, Marcus; Marchant, Hannah; Buckner, Caroline; Bienhold, Christina; Wenzhöfer, Frank

doi:https://doi.org/10.5194/bg-15-6537-2018

Articles | Volume 15, issue 21

https://doi.org/10.5194/bg-15-6537-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-15-6537-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 15, issue 21

Research article

|

07 Nov 2018

Research article |

| 07 Nov 2018

Carbon and nitrogen turnover in the Arctic deep sea: in situ benthic community response to diatom and coccolithophorid phytodetritus

Ulrike Braeckman, Felix Janssen, Gaute Lavik, Marcus Elvert, Hannah Marchant, Caroline Buckner, Christina Bienhold, and Frank Wenzhöfer

Supplement

https://doi.org/10.5194/bg-15-6537-2018-supplement

Data sets

Carbon and nitrogen turnover during an in situ experiment with addition of Thalassiosira sp. and E. huxleyi phytodetritus at AWI-HAUSGARTEN S2 in 2013 U. Braeckman, F. Janssen, G. Lavik, M. Elvert, H. K. Marchant, C. Buckner, C. Bienhold, and F. Wenzhöfer https://doi.org/10.1594/PANGAEA.885617

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Short summary

Global warming has altered Arctic phytoplankton communities, with unknown effects on deep-sea communities that depend strongly on food produced at the surface. We compared the responses of Arctic deep-sea benthos to input of phytodetritus from diatoms and coccolithophorids. Coccolithophorid carbon was 5× less recycled than diatom carbon. The utilization of the coccolithophorid carbon may be less efficient, so a shift from diatom to coccolithophorid blooms could entail a delay in carbon cycling.