Polar Biology

, Volume 31, Issue 6, pp 765–769

Transient sediment load on blades of Arctic Saccharina latissima can mitigate UV radiation effect on photosynthesis

Authors

    • Institute for Polar EcologyUniversity of Kiel
  • Dirk Dethleff
    • Institute for Polar EcologyUniversity of Kiel
  • Christian Wiencke
    • Section Seaweed BiologyAlfred Wegener Institute for Polar and Marine Research
Short Note

DOI: 10.1007/s00300-008-0434-z

Cite this article as:
Roleda, M.Y., Dethleff, D. & Wiencke, C. Polar Biol (2008) 31: 765. doi:10.1007/s00300-008-0434-z

Abstract

We studied the short-term impact of sediment load on the photosynthetic performance of Saccharina latissima sporophytes exposed to ultraviolet radiation (UVR). The algae were collected from different sediment-influenced environments in Svalbard in August 2007. Initial optimum quantum yield (Fv/Fm) of sediment-covered sporophytes was significantly higher compared to sediment-free sporophytes. Experimental sediment coating on blade discs had a photoprotective function by screening out 92% of the weighted UV-B (UVery) treatment. No UVR-induced photoinhibition was observed in sediment-coated blade discs while sediment removal caused a reduction in Fv/Fm not only after 12-h UVR exposure but also after 6-h recovery in low white light compared to the initial value. Thus, sediment coating has a short-term functional significance in mitigating the negative effect of UVR on photosynthesis of an important kelp species and set a baseline for further studies.

Keywords

Ablation-derived siltationArctic fjord systemClimate changeFv/FmOptimum quantum yield

Supplementary material

300_2008_434_MOESM1_ESM.doc (2.9 mb)
(DOC 2966 kb)

Copyright information

© Springer-Verlag 2008