The DOI matches its Crossref record; 25 of the 25 references it cites were found in a registry or an index.
Nitrogen isotope fractionation during the uptake and assimilation of nitrate, nitrite, ammonium, and urea by a marine diatom
Abstract
Knowledge of the fractionation of nitrogen isotopes by phytoplankton is a key requirement for the calibration of the new δ 15 N paleotracer. An essential part of information required in this calibration concerns the magnitude of isotopic fractionation during the incorporation of N substrates by phytoplankton. To this end, the δ 15 N of batch cultures of Thalassiosira pseudonana grown on nitrate, nitrite, ammonium, and urea was determined. This paper reports the first δ 15 N study of phytoplankton growth on urea (e.g. organic N substrate). The δ 15 N of the particulate nitrogen (PN) collected during the logarithmic growth phase, thus for N‐sufficient cells, was lower than the δ 15 N of the source due to kinetic isotope fractionation. With increasing drawdown of the N substrate, the δ 15 N of the accumulating PN increased in accordance with the Rayleigh distillation model. Enrichment factors (ε) derived from a least‐squares analysis of the accumulated δ 15 N PN data were 5.2 ± 0.2‰, 0.9 ± 0.6‰, 20 ± 1‰, and 0.8 ± 0.6‰ for NO 3−, NO 2−, NH 4+, and urea incorporation, respectively. Overall, ε values for nitrate incorporation were consistent with field estimates of ~6‰ and could be used to estimate past relative nitrate utilization as estimated from the 615N of bulk sedimentary organic matter.
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Acclimation and toxicity of high ammonium concentrations to unicellular algae
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Self-citationThe δ15N of nitrate in the southern ocean: Consumption of nitrate in surface waters
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“Both ammonium and nitrate can be used as N sources in primary production, with fractionations of −10 (± 5) ‰ and−3(± 2) ‰, respectively (Hoch et al., 1994; Waser et al., 1998).”
BackgroundResult
Metadata
- Authors
- Waser, N. A. D., Harrison, P. J., Nielsen, B., Calvert, S. E., & Turpin, D. H.
- Venue
- Limnology and Oceanography
- Publisher
- Wiley
- Published
- 1998-03
- Volume
- 43
- Issue
- 2
- Pages
- 215-224
- ISSN
- 0024-3590 (ISSN-L)
- 1939-5590
- OpenAlex
- W2147481833
- Cited by
- 342
- References
- 25
- FWCI
- 11.78
- Type
- journal article
- Language
- en
- Open access
- closed
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- Waser, N. A. D., Harrison, P. J., Nielsen, B., Calvert, S. E., & Turpin, D. H. (1998). Nitrogen isotope fractionation during the uptake and assimilation of nitrate, nitrite, ammonium, and urea by a marine diatom. Limnology and Oceanography. https://doi.org/10.4319/lo.1998.43.2.0215
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