High tolerance of protozooplankton to ocean acidification in an Arctic coastal plankton community

Aberle, Nicole, Schulz, Kai G., Stuhr, Annegret, Ludwig, Andrea and Riebesell, Ulf (2013) High tolerance of protozooplankton to ocean acidification in an Arctic coastal plankton community Biogeosciences (BG), 10 (3). pp. 1472-1481. DOI 10.5194/bg-10-1471-2013.

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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 protozooplankton (PZP in the following) community during the post-bloom period in the Kongsfjorden (Svalbard) to direct and indirect effects of high pCO2/low pH. We found almost no direct effects of OA on PZP composition and diversity. Both, the relative shares of ciliates and heterotrophic dinoflagellates as well as the taxonomic composition of protozoans remained unaffected by changes in pCO2/pH. The different pCO2 treatments did not have any effect on food availability and phytoplankton composition and thus no indirect effects e.g. on the total carrying capacity and phenology of PZP could be observed. Our data points at a high tolerance of this Arctic PZP community to changes in pCO2/pH. Future studies on the impact of OA on plankton communities should include PZP in order to test whether the observed low sensitivity of protozoans to OA is typical for coastal communities where changes in seawater pH occur frequently.

Document Type: Article
Additional Information: WOS:000317010600017
Keywords: HIGH PH; SEAWATER ACIDIFICATION; PHYTOPLANKTON GROWTH; MARINE-PHYTOPLANKTON; EMILIANIA-HUXLEYI; INCREASED PCO(2); GRAZING IMPACT; CARBON-DIOXIDE; WEST GREENLAND; CO2 LEVELS
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-N Experimental Ecology - Food Webs
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BI Biological Oceanography
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
DOI etc.: 10.5194/bg-10-1471-2013
ISSN: 1726-4170
Projects: EPOCA
Expeditions/Models:
Date Deposited: 03 Dec 2012 13:16
Last Modified: 26 Jul 2016 09:26
URI: http://eprints.uni-kiel.de/id/eprint/19474

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