Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6388450 | Progress in Oceanography | 2015 | 14 Pages |
Abstract
Several recent lines of evidence indicate that the polar night is key to understanding Arctic marine ecosystems. First, the polar night is not a period void of biological activity even though primary production is close to zero, but is rather characterized by a number of processes and interactions yet to be fully understood, including unanticipated high levels of feeding and reproduction in a wide range of taxa and habitats. Second, as more knowledge emerges, it is evident that a coupled physical and biological perspective of the ecosystem will redefine seasonality beyond the “calendar perspective”. Third, it appears that many organisms may exhibit endogenous rhythms that trigger fitness-maximizing activities in the absence of light-based cues. Indeed a common adaptation appears to be the ability to utilize the dark season for reproduction. This and other processes are most likely adaptations to current environmental conditions and community and trophic structures of the ecosystem, and may have implications for how Arctic ecosystems can change under continued climatic warming.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geology
Authors
Jørgen Berge, Paul E. Renaud, Gerald Darnis, Finlo Cottier, Kim Last, Tove M. Gabrielsen, Geir Johnsen, Lena Seuthe, Jan Marcin Weslawski, Eva Leu, Mark Moline, Jasmine Nahrgang, Janne E. Søreide, Ãystein Varpe, Ole Jørgen Lønne, Malin Daase,