Effect of acidification on an Arctic phytoplankton community from Disko Bay, West Greenland


Long-term measurements (i.e. months) of in situ pH have not previously been reported from the Arctic; this study shows fluctuations between pH 7.5 and 8.3 during the spring bloom 2012 in a coastal area of Disko Bay, West Greenland. The effect of acidification on phytoplankton from this area was studied at both the community and species level in experimental pH treatments within (pH 8.0, 7.7 and 7.4) and outside (pH 7.1) in situ pH. The growth rate of the phytoplankton community decreased during the experimental acidification from 0.50 ± 0.01/day (SD) at pH 8.0 to 0.22 ± 0.01/day at pH 7.1. Nevertheless, the response to acidification was species-specific and divided into 4 categories: I, least affected; II, affected only at pH 7.1; III, gradually affected and IV, highly affected. In addition, the colony size and chain length of selected species were affected by the acidification. Our findings show that coastal phytoplankton from Disko Bay is naturally exposed to pH fluctuations exceeding the experimental pH range used in most ocean acidification studies. We emphasize that studies on ocean acidification should include in situ pH before assumptions on the effect of acidification on marine organisms can be made.

In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2015) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation is 2015-06-01.

Supplement to: Thoisen, Christina; Riisgaard, Karen; Lundholm, Nina; Nielsen, Torkel Gissel; Hansen, Per Juel (2015): Effect of acidification on an Arctic phytoplankton community from Disko Bay, West Greenland. Marine Ecology Progress Series, 520, 21-34

DOI https://doi.org/10.1594/PANGAEA.847228
Related Identifier https://doi.org/10.3354/meps11123
Related Identifier https://cran.r-project.org/package=seacarb
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.847228
Creator Thoisen, Christina (ORCID: 0000-0002-8732-474X); Riisgaard, Karen; Lundholm, Nina ORCID logo; Nielsen, Torkel Gissel (ORCID: 0000-0003-1057-158X); Hansen, Per Juel ORCID logo
Publisher PANGAEA
Contributor Yang, Yan
Publication Year 2015
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 2880 data points
Discipline Earth System Research
Spatial Coverage (-53.367 LON, 69.217 LAT)