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Bioluminescence as an ecological factor during high Arctic polar night
Cronin, H.A.; Cohen, J.H.; Berge, J.; Johnsen, G.; Moline, M.A. (2016). Bioluminescence as an ecological factor during high Arctic polar night. NPG Scientific Reports 6(36374 ): 9 pp. https://dx.doi.org/10.1038/srep36374
In: Scientific Reports (Nature Publishing Group). Nature Publishing Group: London. ISSN 2045-2322; e-ISSN 2045-2322, meer
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| Auteurs | | Top |
- Cronin, H.A.
- Cohen, J.H.
- Berge, J., meer
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| Abstract |
Bioluminescence commonly influences pelagic trophic interactions at mesopelagic depths. Here we characterize a vertical gradient in structure of a generally low species diversity bioluminescent community at shallower epipelagic depths during the polar night period in a high Arctic fjord with in situ bathyphotometric sampling. Bioluminescence potential of the community increased with depth to a peak at 80 m. Community composition changed over this range, with an ecotone at 20–40 m where a dinoflagellate-dominated community transitioned to dominance by the copepod Metridia longa. Coincident at this depth was bioluminescence exceeding atmospheric light in the ambient pelagic photon budget, which we term the bioluminescence compensation depth. Collectively, we show a winter bioluminescent community in the high Arctic with vertical structure linked to attenuation of atmospheric light, which has the potential to influence pelagic ecology during the light-limited polar night. |
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