Articles | Volume 12, issue 16
https://doi.org/10.5194/bg-12-4895-2015
https://doi.org/10.5194/bg-12-4895-2015
Research article
 | 
19 Aug 2015
Research article |  | 19 Aug 2015

Macroalgae contribute to nested mosaics of pH variability in a subarctic fjord

D. Krause-Jensen, C. M. Duarte, I. E. Hendriks, L. Meire, M. E. Blicher, N. Marbà, and M. K. Sejr

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Cited articles

AMAP: AMAP Assessment 2013: Arctic Ocean Acidification, Arctic Monitoring and Assessment Programme (AMAP), Oslo, Norway, viii + 99 pp., ISBN – 978-82-7971-082-0, 2013.
Arendt, K. E., Juul-Pedersen, T., Mortensen, J., Blicher, M. E., and Rysgaard, S: A 5-year study of seasonal patterns in mesozooplankton community structure in a sub-Arctic fjord reveals dominance of Microsetella norvegica (Crustacea, Copepoda), J. Plank. Res., 35, 105–120, 2013.
Arrigo, K. R., van Dijken, G., and Pabi, S.: Impact of a shrinking Arctic ice cover on marine primary production, Geophys. Res. Lett., 35, 1–6, 2008.
Attard, K. M., Glud, R. N., McGinnis, D. F., and Rysgaard, S.: Seasonal rates of benthic primary production in a Greenland fjord measured by aquatic eddy correlationLimnol, Oceanography, 59, 1555–1569, 2014.
Björk, M., Axelsson, L., and Beer, S.: Why is Ulva intestinalis the only macroalga inhabiting isolated rock pools along the Swedish Atlantic coast? Mar. Ecol. Prog. Ser., 284, 109–116, 2004.
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Short summary
The Arctic Ocean is considered the most vulnerable ecosystem to ocean acidification (OA), but very little information is available on natural variability of pH in the Arctic coastal zone. We report pH variability at various scales in a Greenland fjord. Variability ranged up to 0.2-0.3 pH units horizontally and vertically in the fjord, between seasons and on diel basis in kelp forests and was extreme in tidal pools. Overall, primary producers played a fundamental role in producing mosaics of pH.
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