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• W2159570945 startingPage "901" @default.
• W2159570945 abstract "Abstract Carbon uptake and partitioning of two globally abundant diatom species, Thalassiosira weissflogii and Dactyliosolen fragilissimus , was investigated in batch culture experiments under four conditions: ambient (15°C, 400 μatm), high CO 2 (15°C, 1000 μatm), high temperature (20°C, 400 μatm), and combined (20°C, 1000 μatm). The experiments were run from exponential growth into the stationary phase (six days after nitrogen depletion), allowing us to track biogeochemical dynamics analogous to bloom situations in the ocean. Elevated CO 2 had a fertilizing effect and enhanced uptake of dissolved inorganic carbon (DIC) by about 8% for T. weissflogii and by up to 39% for D. fragilissimus . This was also reflected in higher cell numbers, build‐up of particulate and dissolved organic matter, and transparent exopolymer particles. The CO 2 effects were most prominent in the stationary phase when nitrogen was depleted and CO 2 (aq) concentrations were low. This indicates that diatoms in the high CO 2 treatments could take up more DIC until CO 2 concentrations in seawater became so low that carbon limitation occurs. These results suggest that, contrary to common assumptions, diatoms could be highly sensitive to ongoing changes in oceanic carbonate chemistry, particularly under nutrient limitation. Warming from 15 to 20 °C had a stimulating effect on one species but acted as a stressor on the other species, highlighting the importance of species‐specific physiological optima and temperature ranges in the response to ocean warming. Overall, these sensitivities to CO 2 and temperature could have profound impacts on diatoms blooms and the biological pump." @default.
• W2159570945 created "2016-06-24" @default.
• W2159570945 creator A5005675240 @default.
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• W2159570945 date "2015-03-02" @default.
• W2159570945 modified "2023-10-06" @default.
• W2159570945 title "Combined effects of CO₂ and temperature on carbon uptake and partitioning by the marine diatoms <i>Thalassiosira weissflogii</i> and <i>Dactyliosolen fragilissimus</i>" @default.
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• W2159570945 doi "https://doi.org/10.1002/lno.10063" @default.
• W2159570945 hasPublicationYear "2015" @default.

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