drivers of soil respiration of root and microbial ... - Unitus DSpace

Residuals (µmol m -2 s -1 )
Predicted CO2 (µmol m -2 s -1 )
Predicted CO2 (µmol m -2 s -1 )
11
10
9
8
7
6
5
4
3
2
1
0
2.0
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
-2.5
11
10
9
8
7
6
5
4
3
2
1
0
(a)
regression line
(b)
R 2 = 0.59
line 1:1
Measured CO 2 (µmol m -2 s -1 )
0 1 2 3 4 5 6 7 8 9 10 11
0 2 4 6 8 10
(c)
regression line
R 2 = 0.73
GPP (µmol m -2 s -1 )
line 1:1
Measured CO 2 (µmol m -2 s -1 )
0 1 2 3 4 5 6 7 8 9 10 11
Fig. 15 a) Measured vs. predicted CO2 efflux b) Residuals vs. Gross primary production (GPP); c) Measured vs.
predicted CO2 efflux including GPP in the model equation. Data of 2006 and 2007 were used.
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