Xu, Kai; Gao, Kunshan; Villafañe, Virginia E; Heibling, E W (2011): Seawater carbonate chemistry and photosynthetic response of Emiliania huxleyi (CS-369) to UV radiation and elevated temperature duirng experiments, 2011 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.770102, Supplement to: Xu, K et al. (2011): Photosynthetic responses of Emiliania huxleyi to UV radiation and elevated temperature: roles of calcified coccoliths. Biogeosciences, 8(6), 1441-1452, https://doi.org/10.5194/bg-8-1441-2011
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Changes in calcification of coccolithophores may affect their photosynthetic responses to both, ultraviolet radiation (UVR, 280-400 nm) and temperature. We operated semi-continuous cultures of Emiliania huxleyi (strain CS-369) at reduced (0.1 mM, LCa) and ambient (10 mM, HCa) Ca2+ concentrations and, after 148 generations, we exposed cells to six radiation treatments (>280, >295, >305, >320, >350 and >395 nm by using Schott filters) and two temperatures (20 and 25 °C) to examine photosynthesis and calcification responses. Overall, our study demonstrated that: (1) decreased calcification resulted in a down regulation of photoprotective mechanisms (i.e., as estimated via non-photochemical quenching, NPQ), pigments contents and photosynthetic carbon fixation; (2) calcification (C) and photosynthesis (P) (as well as their ratio) have different responses related to UVR with cells grown under the high Ca2+ concentration being more resistant to UVR than those grown under the low Ca2+ level; (3) elevated temperature increased photosynthesis and calcification of E. huxleyi grown at high Ca2+concentrations whereas decreased both processes in low Ca2+ grown cells. Therefore, a decrease in calcification rates in E. huxleyi is expected to decrease photosynthesis rates, resulting in a negative feedback that further reduces calcification.
Keyword(s):
Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (<20 L); Calcification/Dissolution; Chromista; Emiliania huxleyi; Haptophyta; Laboratory experiment; Laboratory strains; Light; Not applicable; Pelagos; Phytoplankton; Primary production/Photosynthesis; Single species; Temperature
Project(s):
Funding:
Sixth Framework Programme (FP6), grant/award no. 511106: European network of excellence for Ocean Ecosystems Analysis
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
2 datasets
Download Data
Datasets listed in this publication series
- Xu, K; Gao, K; Villafañe, VE et al. (2011): Seawater carbonate chemistry and effective photochemical quantum yield, calcification, photosynthesis and UV inhibition of Emiliania huxleyi (CS-369) during experiments, 2011. https://doi.org/10.1594/PANGAEA.770096
- Xu, K; Gao, K; Villafañe, VE et al. (2011): Seawater carbonate chemistry and biological weighting function of Emiliania huxleyi (CS-369) during experiments, 2011. https://doi.org/10.1594/PANGAEA.770101