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Dataset: Nitrogen fixation incubation data from cruise TN368 in July 2019 for SPIROPA project

Preliminary and in progressVersion 1 (2024-05-23)Dataset Type:Cruise ResultsDataset Type:experimental

Margaret Mulholland (Principal Investigator)

Phoebe Dreux Chappell (Co-Principal Investigator)

Corday Selden (Student)

Dana Stuart Gerlach (BCO-DMO Data Manager)

Project: Collaborative Research: Shelfbreak Frontal Dynamics: Mechanisms of Upwelling, Net Community Production, and Ecological Implications (SPIROPA)

Abstract

Continental shelves contribute a large fraction of the ocean’s new nitrogen (N) via N2 fixation; yet, we know little about how physical processes at the ocean’s margins shape diazotroph biogeography and activity. This dataset includes incubation data and nitrogen fixation rates using water collected at the Mid-Atlantic Bight shelfbreak front in July 2019. Rates were measured using the 15N2 bubble release method on repeat cross-frontal transects. This study was coordinated with the SPIROPA (‘Shel...

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This nitrogen fixation incubation data is a supplement to BCO-DMO dataset https://www.bco-dmo.org/dataset/927927, which is hydrographic, nutrient, and mean nitrogen fixation rate data from the SPIROPA project's third cruise.  Bottle data from the TN368 cruise (Chief Sci McGillicuddy) can be viewed here: https://www.bco-dmo.org/dataset/849340.

Glossary of terms:
A = Atom-% enrichment
APN = Atom-% enrichment of the particulate nitrogen pool
BDL = Below detection limit
DNQ = Detectable but not quantifiable
LOD = Limit of detection
LOQ = Limit of quantification
N2 = Nitrogen gas
PETG = Polyethylene Terephthalate Glycol
PN = Particulate nitrogen
NFR = Nitrogen fixation rate
SUR = Specific uptake rate
t0 = time initial
tf = time final

Related Datasets

IsRelatedTo
McGillicuddy, D. J., Sosik, H. M., Zhang, W. G., Smith, W. O., Stanley, R., Turner, J., Petitpas, C. (2022) Bottle sample data from CTD casts from the third cruise of SPIROPA project, R/V Thomas G. Thompson cruise TN368, to the New England Shelfbreak in July of 2019. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 2) Version Date 2022-06-08 doi:10.26008/1912/bco-dmo.849340.2
[view at BCO-DMO]
IsSupplementTo
Mulholland, M., Chappell, P. Dreux, Selden, C. (2024) Hydrography, nutrients, and nitrogen uptake rates from SPIROPA cruise TN368 in July 2019. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2024-05-20 http://lod.bco-dmo.org/id/dataset/927927
[view at BCO-DMO]

Related Publications

Methods
Chang, B. X., Jayakumar, A., Widner, B., Bernhardt, P., Mordy, C. W., Mulholland, M. R., & Ward, B. B. (2019). Low rates of dinitrogen fixation in the eastern tropical South Pacific. Limnology and Oceanography, 64(5), 1913–1923. Portico. https://doi.org/10.1002/lno.11159
Methods
Klawonn, I., Lavik, G., Böning, P., Marchant, H. K., Dekaezemacker, J., Mohr, W., & Ploug, H. (2015). Simple approach for the preparation of 15−15N2-enriched water for nitrogen fixation assessments: evaluation, application and recommendations. Frontiers in Microbiology, 6. https://doi.org/10.3389/fmicb.2015.00769
Methods
Montoya, J. P., Voss, M., Kahler, P., & Capone, D. G. (1996). A Simple, High-Precision, High-Sensitivity Tracer Assay for N(inf2) Fixation. Applied and Environmental Microbiology, 62(3), 986–993. https://doi.org/10.1128/aem.62.3.986-993.1996
Methods
Ripp, J. (1996). Analytical detection limit guidance and laboratory guide for determining method detection limits. Wisconsin Department of Natural Resources, Laboratory Certification Program.
Results
Selden, C. R., Chappell, P. D., Clayton, S., Macías‐Tapia, A., Bernhardt, P. W., & Mulholland, M. R. (2021). A coastal <scp>N2</scp> fixation hotspot at the Cape Hatteras front: Elucidating spatial heterogeneity in diazotroph activity via supervised machine learning. Limnology and Oceanography, 66(5), 1832–1849. Portico. https://doi.org/10.1002/lno.11727

Mulholland, M., Chappell, P. Dreux (2024) Nitrogen fixation incubation data from cruise TN368 in July 2019 for SPIROPA project. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2024-05-23 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/928568 [access date]

Terms of Use

This dataset is licensed under Creative Commons Attribution 4.0.


If you wish to use this dataset, it is highly recommended that you contact the original principal investigators (PI). Should the relevant PI be unavailable, please contact BCO-DMO (info@bco-dmo.org) for additional guidance. For general guidance please see the BCO-DMO Terms of Use document.

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Funded by the U.S. National Science Foundation