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Two Chemically Distinct Pools of Organic Nitrogen Accumulate in the Ocean
Abstract
The chemical dynamics of marine dissolved organic nitrogen (DON), a reservoir featuring surface accumulations even in areas where nitrogen limits productivity, have yet to be resolved. We exploited differences in the acid lability of amide bonds within high-molecular-weight (HMW) DON to show that vertical DON profiles result in part from the presence of two chemically distinct pools of amide. Half of HMWDON in surface waters is present as N -acetyl amino polysaccharides. In contrast, nearly all deep-sea HMWDON, and therefore, most HMWDON, is present in amides that resist both chemical hydrolysis and biological degradation.
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Citations
Cited by
DON as a source of bioavailable nitrogen for phytoplankton
Bronk, D. A., See, J. H., Bradley, P., & Killberg, L. (2007) · Biogeosciences · doi:10.5194/bg-4-283-2007 · Cited by 531
Quantitative solid-state 13C NMR with signal enhancement by multiple cross polarization
Johnson, R. L., & Schmidt-Rohr, K. (2014) · Journal of Magnetic Resonance · doi:10.1016/j.jmr.2013.11.009 · Cited by 377
Mopper, K., Stubbins, A., Ritchie, J. D., Bialk, H. M., & Hatcher, P. G. (2007) · Chemical Reviews · doi:10.1021/cr050359b · Cited by 368
Codispoti, L. A. (2007) · Biogeosciences · doi:10.5194/bg-4-233-2007 · Cited by 299
Helms, J. R., Stubbins, A., Perdue, E. M., Green, N. W., Chen, H., & Mopper, K. (2013) · Marine Chemistry · doi:10.1016/j.marchem.2013.05.015 · Cited by 291
Metadata
- Authors
- Aluwihare, L. I., Repeta, D. J., Pantoja, S., & Johnson, C. G.
- Venue
- Science
- Published
- 2005-05-13
- Volume
- 308
- Issue
- 5724
- Pages
- 1007-1010
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2038871885
- Cited by
- 204
- References
- 0
- FWCI
- 8.58
- Type
- journal article
- Language
- en
- Open access
- closed
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- Aluwihare, L. I., Repeta, D. J., Pantoja, S., & Johnson, C. G. (2005). Two Chemically Distinct Pools of Organic Nitrogen Accumulate in the Ocean. Science. https://doi.org/10.1126/science.1108925
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