Testing the influence of light on nitrite cycling in the eastern tropical North Pacific

Travis, Nicole M.; Kelly, Colette L.; Casciotti, Karen L.

doi:https://doi.org/10.5194/bg-21-1985-2024

Articles | Volume 21, issue 8

https://doi.org/10.5194/bg-21-1985-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-21-1985-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 8

Research article

|

23 Apr 2024

Research article |

| 23 Apr 2024

Testing the influence of light on nitrite cycling in the eastern tropical North Pacific

Nicole M. Travis, Colette L. Kelly, and Karen L. Casciotti

Supplement

https://doi.org/10.5194/bg-21-1985-2024-supplement

Data sets

Bottle data and chemical analysis from Falkor cruise FK180624 in the Eastern Tropical North Pacific Ocean in 2018 A. R. Babbin et al. https://doi.org/10.26008/1912/bco-dmo.832389.1

Table of experimental rates of ammonia oxidation, nitrite oxidation, nitrate reduction, and nitrite uptake from the Eastern Tropical North Pacific Ocean N. M. Travis et al. https://doi.org/10.25740/ds821fj1220

Bottle data from CTD casts conducted on R/V Sally Ride cruise SR1805 in the Eastern Tropical North Pacific Ocean from March to April 2018 B. B. Ward and K. L. Casciotti https://doi.org/10.26008/1912/bco-dmo.854091.1

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Short summary

We conducted experimental manipulations of light level on microbial communities from the primary nitrite maximum. Overall, while individual microbial processes have different directions and magnitudes in their response to increasing light, the net community response is a decline in nitrite production with increasing light. We conclude that while increased light may decrease net nitrite production, high-light conditions alone do not exclude nitrification from occurring in the surface ocean.