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Cloud shadows drive vertical migrations of deep-dwelling marine life
Omand, Melissa Steinberg, Deborah K. Stamieszkin, Karen
Omand, Melissa
Steinberg, Deborah K.
Stamieszkin, Karen
Abstract
Our study provides evidence that, in addition to diel vertical migration, zooplankton residing at >300-m depth during the day perform high-frequency, vertical migrations due to light modulation by clouds. Using a water-following framework and measurements and modeling of the twilight zone light field, we isolated the detailed phototactic response and show that some twilight zone animals are considerably more active than previously thought, with a cumulative distance traveled of more than one-third of that for diel migration. The increased movement increases predation risk and has implications for the metabolic requirements of these animals in the food-limited deep sea.
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2021-01-01
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Biological Sciences Peer-Reviewed Articles
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Virginia Institute of Marine Science
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https://doi.org/10.1073/pnas.2022977118