Articles | Volume 16, issue 5
Biogeosciences, 16, 1019–1034, 2019
https://doi.org/10.5194/bg-16-1019-2019
Biogeosciences, 16, 1019–1034, 2019
https://doi.org/10.5194/bg-16-1019-2019

Research article 14 Mar 2019

Research article | 14 Mar 2019

Phytoplankton calcifiers control nitrate cycling and the pace of transition in warming icehouse and cooling greenhouse climates

Karin F. Kvale et al.

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Drivers motivating the evolution of calcifying phytoplankton are poorly understood. We explore differences in global ocean chemistry with and without calcifiers during rapid climate changes. We find the presence of phytoplankton calcifiers stabilizes the volume of low oxygen regions and consequently stabilizes the concentration of nitrate, which is an important nutrient required for photosynthesis. By stabilizing nitrate concentrations, calcifiers improve their growth conditions.
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