Articles | Volume 13, issue 6
https://doi.org/10.5194/bg-13-1977-2016
https://doi.org/10.5194/bg-13-1977-2016
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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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.
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