Bioluminescence as an ecological factor during high Arctic polar night
| Autor: | Jonathan H. Cohen, Heather A. Cronin, Geir Johnsen, Mark A. Moline, Jørgen Berge |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
geography Multidisciplinary geography.geographical_feature_category 010504 meteorology & atmospheric sciences Polar night Ecology Mesopelagic zone 010604 marine biology & hydrobiology Fjord Pelagic zone Biology 01 natural sciences Article Arctic Dominance (ecology) VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 Carbonate compensation depth 0105 earth and related environmental sciences Trophic level |
| Zdroj: | Scientific Reports |
| Popis: | 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. © The Author(s) 2016. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| Databáze: | OpenAIRE |
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