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  • AWI_Phytochange; Phytochange @ AWI  (1)
  • Active mixing layer depth; AMUST; Arctic; Arctic phytoplankton under MUltiple STressors; AWIPEV; AWIPEV_2016-AMUST; AWIPEV_2016-AMUST_KB3; AWIPEV_2017-AMUST; AWIPEV_2017-AMUST_KB3; AWIPEV_2018-AMUST; AWIPEV_2018-AMUST_KB3; Calculated from discrete Chl-specific light limited slopes of PI curves; Calculated from discrete spherical 4pi sensor profiles; Campaign; Chlorophyll a; Chlorophyll a, integrated; DATE/TIME; Depth with 1% of photosynthetic active radiation; Dimethylsulfoniopropionate, integrated; Event label; FAABulous; FAABulous: Future Arctic Algae Blooms and their role in the context of climate change; inorganic nutrients; Kongsfjorden; KOP151; Light attenuation, vertical; Light-depended increase in 14C uptake; MON; Monitoring; Net primary production of carbon, integrated; Nitrate, integrated; Phytoplankton; primary production; Station label; Water samples  (1)
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  • 1
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    Unknown
    Culture conditions, mass spectrometric measurements and acclimation carbonate chemistry (2016)
    PANGAEA
    In:  Supplement to: Kottmeier, Dorothee; Rokitta, Sebastian D; Rost, Björn (2016): Acidification, not carbonation, is the major regulator of carbon fluxes in the coccolithophore Emiliania huxleyi. New Phytologist, 211(1), 126-137, https://doi.org/10.1111/nph.13885
    Details
    Publication Date: 2023-03-16
    Description: - A combined increase in seawater [CO2] and [H+] was recently shown to induce a shift from photosynthetic HCO3- to CO2 uptake in Emiliania huxleyi. This shift occurred within minutes, whereas acclimation to ocean acidification (OA) did not affect the carbon source. - To identify the driver of this shift, we exposed low- and high-light acclimated E. huxleyi to a matrix of two levels of dissolved inorganic carbon (1400, 2800 lmol kg-1) and pH (8.15, 7.85) and directly measured cellular O2, CO2 and HCO3 fluxes under these conditions. - Exposure to increased [CO2] had little effect on the photosynthetic fluxes, whereas increased [H+] led to a significant decline in HCO3- uptake. Low-light acclimated cells overcompensated for the inhibition of HCO3- uptake by increasing CO2 uptake. High-light acclimated cells, relying on higher proportions of HCO3- uptake, could not increase CO2 uptake and photosynthetic O2 evolution consequently became carbon-limited. - These regulations indicate that OA responses in photosynthesis are caused by [H+] rather than by [CO2]. The impaired HCO3- uptake also provides a mechanistic explanation for lowered calcification under OA. Moreover, it explains the OA-dependent decrease in photosynthesis observed in high-light grown phytoplankton.
    Keywords: AWI_Phytochange; Phytochange @ AWI
    Type: Dataset
    Format: application/zip, 16.7 kBytes
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Depth integrated biogeochemical and ecophysiological monitoring at station KB3 in Kongsfjorden (2016-2018), Version 2 (2022)
    PANGAEA
    Details
    Publication Date: 2024-02-16
    Description: The project AWI-funded AMUST project aims at understanding at current and future controls of Arctic spring blooms and concurrrent effetcs on biogeochemistry,by combining experimental work with long-term monitoring in April and May each year to study the Kongsfjorden spring bloom. This dataset was also used in the FAABulous project to compare spring bloom phenology in open-water and ice-covered fjords. Environmental as well as biological (stoichiometry and photosynthesis) data from the years 2014, and 2016-2018 for the mid-fjord station KB3 were samples. Furthermore, daily average temperature and salinity from a nearby mooring (see Hop et al. 2019 for details) are provided for the study period.
    Keywords: Active mixing layer depth; AMUST; Arctic; Arctic phytoplankton under MUltiple STressors; AWIPEV; AWIPEV_2016-AMUST; AWIPEV_2016-AMUST_KB3; AWIPEV_2017-AMUST; AWIPEV_2017-AMUST_KB3; AWIPEV_2018-AMUST; AWIPEV_2018-AMUST_KB3; Calculated from discrete Chl-specific light limited slopes of PI curves; Calculated from discrete spherical 4pi sensor profiles; Campaign; Chlorophyll a; Chlorophyll a, integrated; DATE/TIME; Depth with 1% of photosynthetic active radiation; Dimethylsulfoniopropionate, integrated; Event label; FAABulous; FAABulous: Future Arctic Algae Blooms and their role in the context of climate change; inorganic nutrients; Kongsfjorden; KOP151; Light attenuation, vertical; Light-depended increase in 14C uptake; MON; Monitoring; Net primary production of carbon, integrated; Nitrate, integrated; Phytoplankton; primary production; Station label; Water samples
    Type: Dataset
    Format: text/tab-separated-values, 326 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
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