Seasonality of nitrogen sources, cycling, and loading in a New England river discerned from nitrate isotope ratios

Rollinson, Veronica R.; Granger, Julie; Clark, Sydney C.; Blanusa, Mackenzie L.; Koerting, Claudia P.; Vaudrey, Jamie M. P.; Treibergs, Lija A.; Westbrook, Holly C.; Matassa, Catherine M.; Hastings, Meredith G.; Tobias, Craig R.

doi:https://doi.org/10.5194/bg-18-3421-2021

Articles | Volume 18, issue 11

Biogeosciences, 18, 3421–3444, 2021

https://doi.org/10.5194/bg-18-3421-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Biogeosciences, 18, 3421–3444, 2021

https://doi.org/10.5194/bg-18-3421-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 11

Research article

10 Jun 2021

Research article | 10 Jun 2021

Seasonality of nitrogen sources, cycling, and loading in a New England river discerned from nitrate isotope ratios

Veronica R. Rollinson et al.

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May 2021	40	9	0	49
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Oct 2021	34	43	1	78
Nov 2021	38	42	0	80
Dec 2021	25	32	0	57
Jan 2022	22	19	1	42
Feb 2022	25	16	1	42
Mar 2022	20	20	0	40
Apr 2022	18	24	1	43
May 2022	20	16	2	38
Jun 2022	20	15	1	36
Jul 2022	27	22	0	49
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Feb 2023	1	1	0	2

Cumulative views and downloads (calculated since 04 Nov 2020)

Month	HTML	PDF	XML	Total
Nov 2020	196	45	2	243
Dec 2020	44	13	3	60
Jan 2021	32	4	1	37
Feb 2021	32	5	1	38
Mar 2021	14	6	0	20
Apr 2021	11	9	0	20
May 2021	40	9	0	49
Jun 2021	287	81	4	372
Jul 2021	42	46	0	88
Aug 2021	81	24	1	106
Sep 2021	39	18	0	57
Oct 2021	34	43	1	78
Nov 2021	38	42	0	80
Dec 2021	25	32	0	57
Jan 2022	22	19	1	42
Feb 2022	25	16	1	42
Mar 2022	20	20	0	40
Apr 2022	18	24	1	43
May 2022	20	16	2	38
Jun 2022	20	15	1	36
Jul 2022	27	22	0	49
Aug 2022	41	12	0	53
Sep 2022	38	8	0	46
Oct 2022	30	16	2	48
Nov 2022	22	16	0	38
Dec 2022	26	12	1	39
Jan 2023	24	16	0	40
Feb 2023	1	1	0	2

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Short summary

We measured nutrients and the naturally occurring nitrogen (N) and oxygen (O) stable isotope ratios of nitrate discharged from a New England river over an annual cycle, to monitor N loading and identify dominant sources from the watershed. We uncovered a seasonality to loading and sources of N from the watershed. Seasonality in the nitrate isotope ratios also informed on N cycling, conforming to theoretical expectations of riverine nutrient cycling.

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Seasonality of nitrogen sources, cycling, and loading in a New England river discerned from nitrate isotope ratios

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