Table 1 Soil properties.
From: Seabird-affected taluses are denitrification hotspots and potential N2O emitters in the High Arctic
Site | BL | ST | ||||||
|---|---|---|---|---|---|---|---|---|
Location | T-U | T-M | T-L | C | T-U | T-M | T-L | C |
Soil water content (% w/w) | 60.5ab (7.8) | 60.1ab (17.8) | 58.5b (8.4) | 1.7c (1.2) | 66.1ab (9.6) | 79.0ab (0.6) | 82.0a (2.5) | 20.7c (0.5) |
Bulk density (kg m−3) | 509b (267) | 440b (188) | 513b (109) | 1840c (167) | 373b (214) | 127a (21) | 131a (6) | 1400c (70) |
Soil pH (H2O) | 7.3a (0.3) | 7.1a (0.3) | 7.4a (0.2) | 7.3a (0.5) | 7.3a (0.3) | 7.3a (0.2) | 7.1a (0.2) | 7.0a (0.2) |
Total carbon (%) | 25.4ab (3.1) | 29.6ab (8.5) | 20.5b (7.0) | 0.18c (0.08) | 28.6ab (6.9) | 38.8a (3.1) | 36.2a (3.8) | 2.6c (0.8) |
Total nitrogen (%) | 2.57a (0.40) | 2.77a (0.54) | 1.79a (0.54) | 0.012b (0.006) | 2.36a (0.64) | 2.40a (0.14) | 2.37a (0.35) | 0.23b (0.05) |
Carbon-to-nitrogen ratio | 9.9a (0.6) | 10.6a (1.1) | 11.4ab (0.7) | 16.3c (1.5) | 12.3abc (2.4) | 16.2c (1.4) | 15.4bc (2.2) | 11.2a (0.9) |
Ammonium content (mg N kg−1) | 6.92abc (1.79) | 6.14abc (3.13) | 3.91bc (0.89) | 0.30c (0.14) | 13.5a (4.75) | 8.22ab (4.23) | 1.23bc (2.12) | ND |
Nitrate content (mg N kg−1) | 2430a (603) | 2270a (1380) | 885ab (397) | 0.30c (0.25) | 165b (130) | 51.4b (19.6) | 21.2b (3.6) | 1.29c (0.46) |
δ15N of bulk soil (‰) | 14.1ab (1.6) | 19.4a (2.4) | 21.3a (1.4) | 1.5d (0.3) | 10.7b (2.2) | 6.3c (0.9) | 5.9c (1.3) | 4.6c (0.6) |