High tolerance of microzooplankton to ocean acidification in an Arctic coastal plankton community 1Biologische Anstalt Helgoland, Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Kurpromenade, 27498 Helgoland, Germany
05 Mar 2013
2GEOMAR – Helmholtz Centre for Ocean Research, Düsternbrooker Weg 20, 24105 Kiel, Germany
3Sultan Qaboos University, College of Agricultural and Marine Sciences, Dept. of Marine Sciences and Fisheries, P.O. Box 34, 123 Al-Khoud, Sultanate of Oman
Received: 31 July 2012 – Published in Biogeosciences Discuss.: 20 September 2012 Abstract. Impacts of ocean acidification (OA) on marine biota have been observed in a
wide range of marine systems. We used a mesocosm approach to study the
response of a high Arctic coastal microzooplankton community during the
post-bloom period in Kongsfjorden (Svalbard) to direct and indirect
effects of high pCO2/low pH. We found almost no direct effects of OA
on microzooplankton composition and diversity. Both the relative shares of
ciliates and heterotrophic dinoflagellates as well as the taxonomic
composition of microzooplankton remained unaffected by changes in
pCO2/pH. Although the different pCO2 treatments affected food
availability and phytoplankton composition, no indirect effects (e.g. on the
total carrying capacity and phenology of microzooplankton) could be observed.
Our data point to a high tolerance of this Arctic microzooplankton community
to changes in pCO2/pH. Future studies on the impact of OA on plankton
communities should include microzooplankton in order to test whether the
observed low sensitivity to OA is typical for coastal communities where
changes in seawater pH occur frequently.
Revised: 03 February 2013 – Accepted: 11 February 2013 – Published: 05 March 2013
Citation: Aberle, N., Schulz, K. G., Stuhr, A., Malzahn, A. M., Ludwig, A., and Riebesell, U.: High tolerance of microzooplankton to ocean acidification in an Arctic coastal plankton community, Biogeosciences, 10, 1471-1481, doi:10.5194/bg-10-1471-2013, 2013.