Articles | Volume 17, issue 4
https://doi.org/10.5194/bg-17-1169-2020
https://doi.org/10.5194/bg-17-1169-2020
Research article
 | 
28 Feb 2020
Research article |  | 28 Feb 2020

Light availability modulates the effects of warming in a marine N2 fixer

Xiangqi Yi, Fei-Xue Fu, David A. Hutchins, and Kunshan Gao

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Cited articles

Babin, S. M., Carton, J. A., Dickey, T. D., and Wiggert, J. D.: Satellite evidence of hurricane-induced phytoplankton blooms in an oceanic desert, J. Geophys. Res., 109, C03043, https://doi.org/10.1029/2003jc001938, 2004. 
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Boatman, T. G., Lawson, T., and Geider, R. J.: A key marine diazotroph in a changing ocean: The interacting effects of temperature, CO2 and light on the growth of Trichodesmium Erythraeum ims101, PLOS ONE, 12, e0168796, https://doi.org/10.1371/journal.pone.0168796, 2017. 
Boyd, P. W., and Doney, S. C.: Modelling regional responses by marine pelagic ecosystems to global climate change, Geophys. Res. Lett., 29, 53-1–53-4, https://doi.org/10.1029/2001GL014130, 2002. 
Breitbarth, E., Oschlies, A., and LaRoche, J.: Physiological constraints on the global distribution of Trichodesmium – effect of temperature on diazotrophy, Biogeosciences, 4, 53–61, https://doi.org/10.5194/bg-4-53-2007, 2007. 
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Short summary
Combined effects of warming and light intensity were estimated in N2-fixing cyanobacterium Trichodesmium. Its physiological responses to warming were significantly modulated by light, with growth peaking at 27 °C under the light-saturating condition but being non-responsive across the range of 23–31 °C under the light-limiting condition. Light shortage also weakened the acclimation ability of Trichodesmium to warming, making light-limited Trichodesmium more sensitive to acute temperature change.
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