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- W2016304484 abstract "CR Climate Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials CR 37:203-213 (2008) - DOI: https://doi.org/10.3354/cr00762 Interactive effects of UV radiation and temperature on microstages of Laminariales (Phaeophyceae) from the Arctic and North Sea Ruth Müller1,*, Christian Wiencke1, Kai Bischof2 1Section Seaweed Biology, Alfred Wegener Institute for Marine und Polar Research (AWI), Am Handelshafen 12, 27570 Bremerhaven, Germany 2Department of Marine Botany, University of Bremen, and Center for Tropical Marine Ecology, Leobener Straße, NW2, 28359 Bremen, Germany *Email: ruth.mueller@awi.de ABSTRACT: Spores and gametophytes are considered to be those life-history stages of kelps most susceptible to environmental perturbations and, in particular, to temperature and UV radiation. Microstages of Arctic (Saccharina latissima, Laminaria digitata, Alaria esculenta from Spitsbergen) and temperate kelp species (S. latissima, L. digitata, L. hyperborea from the North Sea) were exposed in 2-factorial experiments to different temperatures (2 to 18°C) and radiation conditions (photosynthetic active radiation, UV-A radiation, UV-B radiation). Our results reveal ecotypic differentiations in the stress responses of zoospores of L. digitata and S. latissima from the Arctic and North Sea. UV-A radiation either enhanced the formation of gametes at elevated temperatures in L. digitata or impaired egg release and subsequent sporophyte formation in L. hyperborea. Microstages exposed to additional UV-B radiation were strongly inhibited to a population-, species- and life phase-specific degree at suboptimal and optimal temperatures. Only gametogenesis of Laminaria spp. was shown to be tolerant to UV-B exposure. Conclusively, in respect to a future scenario of elevated UV radiation regimes and higher summer temperatures in Arctic and North Sea waters, summer-recruiting Arctic species and L. digitata from the North Sea might become endangered by a frequent disturbance of their microstages. KEY WORDS: Ecotypes · Egg release · Gametogenesis · Germination · Kelp · Sporophyte formation · Zoospores Full text in pdf format PreviousNextCite this article as: Müller R, Wiencke C, Bischof K (2008) Interactive effects of UV radiation and temperature on microstages of Laminariales (Phaeophyceae) from the Arctic and North Sea. Clim Res 37:203-213. https://doi.org/10.3354/cr00762 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in CR Vol. 37, No. 2-3. Online publication date: October 16, 2008 Print ISSN: 0936-577X; Online ISSN: 1616-1572 Copyright © 2008 Inter-Research." @default.
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- W2016304484 title "Interactive effects of UV radiation and temperature on microstages of Laminariales (Phaeophyceae) from the Arctic and North Sea" @default.
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