Articles | Volume 16, issue 22
https://doi.org/10.5194/bg-16-4377-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-16-4377-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Shifts in dimethylated sulfur concentrations and microbiome composition in the red-tide causing dinoflagellate Alexandrium minutum during a simulated marine heatwave
Elisabeth Deschaseaux
CORRESPONDING AUTHOR
University of Technology Sydney, Climate Change Cluster, Ultimo NSW
2007, Australia
James O'Brien
University of Technology Sydney, Climate Change Cluster, Ultimo NSW
2007, Australia
Nachshon Siboni
University of Technology Sydney, Climate Change Cluster, Ultimo NSW
2007, Australia
Katherina Petrou
University of Technology Sydney, Climate Change Cluster, Ultimo NSW
2007, Australia
University of Technology Sydney, School of Life Sciences, Ultimo
NSW 2007, Australia
Justin R. Seymour
University of Technology Sydney, Climate Change Cluster, Ultimo NSW
2007, Australia
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N2 fixation by marine diazotrophs is an important bioavailable N source to the global ocean. This updated global oceanic diazotroph database increases the number of in situ measurements of N2 fixation rates, diazotrophic cell abundances, and nifH gene copy abundances by 184 %, 86 %, and 809 %, respectively. Using the updated database, the global marine N2 fixation rate is estimated at 223 ± 30 Tg N yr−1, which triplicates that using the original database.
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Short summary
Here we report that abrupt increases in temperature–simulating marine heatwaves might have the potential to shape the physiological state and biogenic sulfur production in microalgae involved in harmful algal blooms. Changes in physiology and biochemistry seem to trigger a shift in the bacteria community associated with these microalgae. Since microalgae and associated bacteria play an important role in climate regulation, this could have serious consequences for our future ocean and climate.
Here we report that abrupt increases in temperature–simulating marine heatwaves might have the...
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