Geochemical Transactions

Table 1 Productions of labeled-N₂ species by \({}^{15}{\text{NO}}_{3}{^{ -}}\) amendment

From: A potential nitrogen sink discovered in the oxygenated Chukchi Shelf waters of the Arctic

Station	Depth (m)	\({}^{15}{\text{NO}}_{3}{^{ -}}\) amendment (nmol N₂ L⁻¹ h⁻¹)
Station	Depth (m)	¹⁴N¹⁵N	SD	¹⁵N¹⁵N	SD	\({F}^{\text{a}}_{{\text{NO}_3^{-}}}\)	N₂ production	SD
R02	2.8	0.3	0.2	1.8	0.1	0.95	2.0	0.1
	10.0	0.18	0.01	bd^b	bd	0.80	bd	–
	22.0	10.3	4.7	8.4	2.0	0.48	36.8	8.8
	30.4	27.1	2.5	11.5	0.9	0.49	47.0	3.7
	47.2	31.6	1.5	18.4	2.1	0.49	75.9	8.7
CC03	3.1	bd	bd	bd	bd	0.94	bd	–
	9.9	0.4	0.2	2.1	0.7	0.94	2.4	0.8
	19.8	9.8	3.8	27.3	10.8	0.89	34.6	13.7
	30.6	4.2	0.6	8.5	0.9	0.83	12.2	1.3
	48.8	bd	bd	bd	bd	0.83	bd	–
CC07	4.6	1.2	0.2	13.2	0.1	0.95	14.5	0.1
	10.6	bd	bd	bd	bd	0.95	bd	–
	20.8	0.2	0.1	3.2	1.2	0.95	3.5	1.3
	33.7	0.2	0.1	4.1	1.2	0.94	4.6	1.4
R04	3.6	bd	bd	bd	bd	0.96	bd	–
	10.5	bd	bd	bd	bd	0.96	bd	–
	25.5	bd	bd	1.7	0.4	0.96	1.8	0.4
	29.9	bd	bd	2.1	0.9	0.96	2.2	0.9
	48.5	bd	bd	bd	bd	0.96	bd	–

^aFractions of ¹⁵N-labeled \({\text{NO}}_{3}{^{ -} }\) in the incubated system; the final concentration of \({}^{15}{\text{NO}}_{3}{^{ - }}\) was 11 μmol L⁻¹
^bbd here denotes below detection; only N₂ accumulated within 48 h was adopted in our study (slope > 0, p < 0.05)

Back to article page

ISSN: 1467-4866

Contact us

Submission enquiries: journalsubmissions@springernature.com