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)

  1. Values in parentheses denote the standard deviation (n = 3). Different letters within each row (a–d) denote a significant difference among locations (P < 0.05) under the assumption of a log-normal distribution for bulk density, nitrate content, and δ15N and a normal distribution for the other soil properties. ND, not detected. BL, study site in Blomstrandhalvøya; ST, study site in Stuphallet; T-U, talus (upper part); T-M, talus (middle part); T-L, talus (lower part); C, control area not directly affected by seabirds.