Functional redundancy facilitates resilience of subarctic phytoplankton assemblages toward ocean acidification and high irradiance, link to supplement in MS Excel format ...

• Main Authors: Hoppe, Clara Jule Marie, Schuback, Nina, Semeniuk, David M, Maldonado, Maria T, Rost, Björn
• Format: Dataset
• Language: English
• Published: PANGAEA 2017
• Subjects: Global marine biogeochemical cycles of trace elements and their isotopes GEOTRACES; Davis Strait; Ocean acidification; Subarctic
• Online Access: https://dx.doi.org/10.1594/pangaea.878253; https://doi.pangaea.de/10.1594/PANGAEA.878253

In order to understand how ocean acidification (OA) and enhanced irradiance levels might alter phytoplankton eco-physiology, productivity and species composition, we conducted an incubation experiment with a natural plankton assemblage from sub-surface Subarctic waters (Davis Strait, 63°N). The phytoplankton assemblage was exposed to 380 and 1,000 µatm pCO2 at both 15 and 35% surface irradiance over 2 weeks. The incubations were monitored and characterized in terms of their photo-physiology, biomass stoichiometry, primary production and dominant phytoplankton species. We found that the phytoplankton assemblage exhibited pronounced high-light stress in the first days of the experiment (20-30% reduction in photosynthetic efficiency, Fv/Fm). This stress signal was more pronounced when grown under OA and high light, indicating interactive effects of these environmental variables. Primary production in the high light treatments was reduced by 20% under OA compared to ambient pCO2 levels. Over the course of the ... : Supplement to: Hoppe, Clara Jule Marie; Schuback, Nina; Semeniuk, David M; Maldonado, Maria T; Rost, Björn (2017): Functional Redundancy Facilitates Resilience of Subarctic Phytoplankton Assemblages toward Ocean Acidification and High Irradiance. Frontiers in Marine Science, 4, 14 pp ...