Vertical migration as a response to UVR stress in Calanus finmarchicus females and nauplii
| Autor: | Fredrika Norrbin, Anette Wold |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
0106 biological sciences
biology integumentary system 010504 meteorology & atmospheric sciences Calanus finmarchicus 010604 marine biology & hydrobiology Low dose fungi Plankton biology.organism_classification Oceanography 01 natural sciences Vertical mixing Animal science Photosynthetically active radiation Earth and Planetary Sciences (miscellaneous) Environmental Chemistry Ultraviolet radiation Diel vertical migration 0105 earth and related environmental sciences General Environmental Science |
| Zdroj: | Polar Research; Vol 23, No 1 (2004); 27-34 |
| ISSN: | 1751-8369 |
| Popis: | We conducted laboratory experiments to study the behavioural responses of Calanus finmarchicus females and nauplii exposed to artificial ultraviolet radiation (UVR) and photosynthetically active radiation (PAR). Both nauplii and females migrated downwards when exposed to UVR. Nauplii reacted mainly to UV-B radiation, while females responded also to UV-A. Nauplii were also collected in the field to check if vertical distributions supported the experimental findings. Light measurements in Vestfjorden showed that plankton were exposed to quite low doses of UVR most of the time. However, on days with a thin ozone layer, clear sky and low turbidity UV-B doses in the surface waters might be harmful. Strong turbulence in the surface layer prevents nauplii from adjusting their position, exposing them to fluctuating levels of UVR due to vertical mixing. Under calm conditions, however, copepods could migrate sufficiently to avoid harmful UVR doses. |
| Databáze: | OpenAIRE |
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