. 2020 Sep 21;8(9):1442. doi: 10.3390/microorganisms8091442

Table 3.

Quantification of N₂-fixation and nitrification processes in terrestrial Antarctic soil habitats.

Source	N₂-Fixation/Nitrification Rates	Year	References
Moss-associated Nostoc in Vestfold Hills	52–119 mg N m⁻² yr⁻¹	1983	[104]
Moss community in East Ongul Island	0–15 mg N m⁻² day⁻¹	1987	[105]
Soil and grassland from Macquarie Island	0–1372 nmol C₂H₂ reduction h⁻¹ 10 cm⁻¹	1992	[106]
Dry turf and wet moss carpets, Signy Island	1–4.9 kg N ha⁻¹ yr⁻¹	2000	[107]
Soil from Garwood Valley	5–1000 ng NO₂-N g⁻¹ soil week⁻¹	2006	[108]
Hypoliths in the McMurdo Valley	0.38 kg N yr⁻¹	2011	[36]
Soil samples in Anvers Island	12–59 μmol N m⁻² h⁻¹	2012	[109]
Soils in Miers Valley	0–5.8 nmol N cm⁻³ h⁻¹	2012	[75]
Biological soil crusts in Ardley Island	0–3 kg N ha⁻¹ yr⁻¹	2017	[102]
Soil from Miers Valley and Beacon Valley	0.025–0.07 pmol NH₄⁺ oxidation g⁻¹ day⁻¹	2020	[93]