Articles | Volume 17, issue 4
https://doi.org/10.5194/os-17-953-2021
https://doi.org/10.5194/os-17-953-2021
Research article
 | 
23 Jul 2021
Research article |  | 23 Jul 2021

Seasonal variation of the sound-scattering zooplankton vertical distribution in the oxygen-deficient waters of the NE Black Sea

Alexander G. Ostrovskii, Elena G. Arashkevich, Vladimir A. Solovyev, and Dmitry A. Shvoev

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Cited articles

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Arashkevich, E., Ostrovskii, A., and Solovyev, V.: Observations of water column habitats by combining acoustic backscatter data and zooplankton sampling in the NE Black Sea, 40th CIESM Congress Proceedings, Marseille, France, 28 October–1 November 2013, 40, 722, available at: http://www.ciesm.org/online/archives/abstracts/pdf/40/index.php (last access: 19 July 2021), 2013. 
Arashkevich, E. G., Stefanova, K., Bandelj, V., Siokou, I., Kurt, T. T., Örek, Y. A., Timofte, F., Timonin, A., and Solidoro, C.: Mesozooplankton in the open Black Sea: Regional and seasonal characteristics, J. Marine Syst., 135, 81–96, https://doi.org/10.1016/j.jmarsys.2013.07.011, 2014. 
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Short summary
We develop a method for monitoring zooplankton while controlling key environmental conditions at precise depths in the sea. We apply a profiler with an acoustic device to observe the sound-scattering layers formed by zooplankton species that descend for several tens of meters every day all year round and by persistent aggregations of the resting stage of copepods under very low concentrations of dissolved oxygen (below 10 μM L−1) from spring to late autumn.