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Marine Ecology Progress Series

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MEPS 502:295-301 (2014)  -  DOI:

Importance of wave and current exposure to fauna communities in Laminaria hyperborea kelp forests

K. M. Norderhaug1,2,*, H. Christie1, E. Rinde1, H. Gundersen1,2, T. Bekkby1,3

1Norwegian Institute for Water Research (NIVA), Gaustadalléen 21, 0349 Oslo, Norway
2Department of Biology, University of Oslo, PO Box 1066, Blindern, 0316 Oslo, Norway
3Natural History Museum, University of Oslo, PO Box 1172, Blindern, 0318 Oslo, Norway
*Corresponding author:

ABSTRACT: Hydrodynamic forces from waves and currents may have strong but different impacts on benthic diversity. In order to study the relative importance of current and wave exposure to the diversity of macrofauna associated with the kelp Laminaria hyperborea, we sampled fauna on epiphytic algae of 4 different morphological types from 27 stations in a crossed design with 3 levels of wave exposure and current speed. Fauna species number (S) was determined by morphology and amount (weight) of epiphyte and the interaction between wave exposure and current speed. Shannon-Wiener diversity H’ was determined by the epiphyte morphology and amount and degree of wave exposure. The most important factors for faunal community composition were epiphyte morphology and wave exposure, and the effect of wave exposure was different for algae of different morphology. The most diverse fauna communities were found at intermittently wave-exposed sites and on large, rough epiphytic algae. The study shows that waves and currents influence kelp fauna communities very differently. Within our study area, waves had a stronger overall effect compared to currents.

KEY WORDS: Kelp fauna · Diversity · Community composition · Hydrodynamic forces · Waves · Currents

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Cite this article as: Norderhaug KM, Christie H, Rinde E, Gundersen H, Bekkby T (2014) Importance of wave and current exposure to fauna communities in Laminaria hyperborea kelp forests. Mar Ecol Prog Ser 502:295-301.

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