Dead zone or oasis in the open ocean? Zooplankton distribution and migration  in low-oxygen modewater eddies

Hauss, Helena; Christiansen, Svenja; Schütte, Florian; Kiko, Rainer; Edvam Lima, Miryam; Rodrigues, Elizandro; Karstensen, Johannes; Löscher, Carolin R.; Körtzinger, Arne; Fiedler, Björn

doi:https://doi.org/10.5194/bg-13-1977-2016

Articles | Volume 13, issue 6

https://doi.org/10.5194/bg-13-1977-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

Hydrography, biogeochemistry, and biology of "dead-zone eddies"...

https://doi.org/10.5194/bg-13-1977-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 13, issue 6

Research article

|

01 Apr 2016

Research article |

| 01 Apr 2016

Dead zone or oasis in the open ocean? Zooplankton distribution and migration in low-oxygen modewater eddies

Helena Hauss, Svenja Christiansen, Florian Schütte, Rainer Kiko, Miryam Edvam Lima, Elizandro Rodrigues, Johannes Karstensen, Carolin R. Löscher, Arne Körtzinger, and Björn Fiedler

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https://doi.org/10.5194/bg-13-1977-2016-supplement

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Zooplankton distribution and migration in low-oxygen modewater eddies Hauss, Helena; Christiansen, Sarah; Schütte, Florian; Kiko, Rainer; Edvam Lima, M; Rodrigues, Edson; Karstensen, Johannes; Löscher, Carolin; Körtzinger, Arne; Fiedler, Bjoern http://doi.pangaea.de/10.1594/PANGAEA.858323

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Short summary

In a low-oxygen eddy in the tropical Atlantic, total zooplankton biomass was increased. Larger plankton avoided the oxygen minimum zone (OMZ, < 20 µmol O₂ kg⁻¹). We identified four strategies by different plankton groups: (i) shallow OMZ avoidance and compression at surface, (ii) migration to shallow OMZ core during daytime, migration to surface at nighttime, (iii) residing in shallow OMZ day and night and (iv) migration through the shallow OMZ from oxygenated depths to surface and back.