δ15N [‰Air]
log10 (10-1·g·N·kg-1)
A
r = -0.90
y = -1.3·x+3.1**
B
r = -0.95
y = -2.5·x+5.3***
A
r = -0.97
y = -6.2·x+10.2***
r = -0.99
y = -5.8·x+9.7***
r = -1.00
y = -5.7·x+7.7***
r = -0.99
y = -6.0·x+8.3***
r = -0.97
y = -5.6·x+7.2***
B
r = -0.95
y = -3.5·x+7.0***
A
r = -0.99
y = -4.5·x+5.9***
B
r = -0.48
y = -0.9·x+3.3
A
r = -0.33
y = -1.7·x+4.8
r = -0.95
y = -3.9·x+8.2***
r = -0.89
y = -5.2·x+10.6***
B
r = -0.95
y = -8.2·x+16.7***
A
r = -0.94
y = -4.3·x+9.7***
A
B
D
8
r = -0.76
y = -4.6·x+9.1**
E
r = -0.83
y = -3.7·x+6.7**
D
r = -0.82
y = -4.9·x+11.2**
7
E
D
C
r = -0.71
y = -5.9·x+12.6*
5
E
r = -0.92
y = -4.7·x+11.3***
r = -0.78
y = -5.6·x+10.1**
4
6
r = -0.81
y = -5.9·x+10.1**
r = -0.89
y = -6.4·x+12.2***
3
E
D
C
r = -0.64
y = -2.7·x+6.6*
r = -0.75
y = -5.3·x+11.3***
r = -0.71
y = -7.2·x+10.8*
C
B
E
r = -0.89
y = -4.2·x+5.1***
r = -0.98
y = -4.6·x+7.9***
r = -0.90
y = -6.2·x+12.9***
r = -0.44
y = -2.3·x+6.3
A
r = -0.84
y = -4.2·x+10.3**
r = -0.95
y = -7.1·x+12.2***
D
C
B
r = -0.86
y = -3.8·x+10.1**
r = -0.73
y = -3.7·x+7.9*
C
2
E
D
r = -0.98
y = -3.4·x+4.4***
r = -0.90
y = -6.9·x+10.3***
E
r = -0.99
y = -4.6·x+6.6***
r = -0.99
y = -9.3·x+13.6***
r = -0.95
y = -5.8·x+7.4***
r = -0.97
y = -7.5·x+11.3***
D
C
B
A
r = -0.98
y = -5.1·x+6.5***
r = -0.93
y = -5.6·x+7.3***
E
D
C
1
r = -0.99
y = -4.7·x+8.1***
r = -0.89
y = -8.6·x+13.4***
r = -0.90
y = -3.7·x+6.2***
E
D
C
0
r = -0.96
y = -2.0·x+4.3***
r = -0.95
y = -6.6·x+8.3***
r = -0.96
y = -6.4·x+9.6***
E
D
C
B
A
r = -0.91
y = -1.8·x+4.0**
r = -0.95
y = -4.6·x+8.3***
r = -0.97
y = -9.2·x+13.4***
D
C
B
A
r = -0.87
y = -6.1·x+9.9***
r = -0.97
y = -1.5·x+3.3***
B
A
r = -0.89
y = -6.0·x+7.0***
C
E
r = -0.82
y = -7.0·x+15.3**
9
10
Fig S2 Linear regressions between logarithmized nitrogen concentrations log10 (10-1·g·N·kg-1) and
corresponding δ15N values [‰Air] for dune stages (0-10) with five replicates each (A-E) and linear
regression lines including regression equation. No regression lines at sites with insignificant linear
regressions. *, P < 0.05; **, P < 0.01; ***, P < 0.001.