eCite Digital Repository

Effects of ocean acidification on primary production in a coastal North Sea phytoplankton community

Citation

Eberlein, T and Wohlrad, S and Rost, B and John, U and Bach, LT and Riebesell, U and Van de Waal, DB, Effects of ocean acidification on primary production in a coastal North Sea phytoplankton community, PLoS ONE, 12, (3) Article e0172594. ISSN 1932-6203 (2017) [Refereed Article]


Preview
PDF
2Mb
  

Copyright Statement

Copyright 2017 Eberlein et al. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.1371/journal.pone.0172594

Abstract

We studied the effect of ocean acidification (OA) on a coastal North Sea plankton community in a long-term mesocosm CO2-enrichment experiment (BIOACID II long-term mesocosm study). From March to July 2013, 10 mesocosms of 19 m length with a volume of 47.5 to 55.9 m3 were deployed in the Gullmar Fjord, Sweden. CO2 concentrations were enriched in five mesocosms to reach average CO2 partial pressures (pCO2) of 760 μatm. The remaining five mesocosms were used as control at ambient pCO2 of 380 μatm. Our paper is part of a PLOS collection on this long-term mesocosm experiment. Here, we here tested the effect of OA on total primary production (PPT) by performing 14C-based bottle incubations for 24 h. Furthermore, photoacclimation was assessed by conducting 14C-based photosynthesis-irradiance response (P/I) curves. Changes in chlorophyll a concentrations over time were reflected in the development of PPT, and showed higher phytoplankton biomass build-up under OA. We observed two subsequent phytoplankton blooms in all mesocosms, with peaks in PPT around day 33 and day 56. OA had no significant effect on PPT, except for a marginal increase during the second phytoplankton bloom when inorganic nutrients were already depleted. Maximum light use efficiencies and light saturation indices calculated from the P/I curves changed simultaneously in all mesocosms, and suggest that OA did not alter phytoplankton photoacclimation. Despite large variability in time-integrated productivity estimates among replicates, our overall results indicate that coastal phytoplankton communities can be affected by OA at certain times of the seasonal succession with potential consequences for ecosystem functioning.

Item Details

Item Type:Refereed Article
Keywords:ocean acidification, primary production, phytoplankton
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Biological Oceanography
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
UTAS Author:Bach, LT (Dr Lennart Bach)
ID Code:133661
Year Published:2017
Web of Science® Times Cited:12
Deposited By:Ecology and Biodiversity
Deposited On:2019-07-05
Last Modified:2019-08-06
Downloads:4 View Download Statistics

Repository Staff Only: item control page