Ecological Archives E096-131-A4

Ricardo M. Holdo and Jesse B. Nippert. 2015. Transpiration dynamics support resource partitioning in African savanna trees and grasses. Ecology 96:14661472. http://dx.doi.org/10.1890/14-1986.1

Appendix D. A table showing lasso regression coefficients and model fits.

Table D1. Lasso regression coefficients and model fits for two sets of models (soil moisture variables only and weather + soil moisture variables) relating environmental variables to transpiration metrics (rescaled sap flow in trees and –Tc and –ΔT in grasses).

Type

ID

Soil moisture only

 

Weather + soil moisture

 

5cm

10cm

20cm

40cm

Adj.R²

 

Wind
(×10-2)

TA
(×10-3)

RH
(×10-3)

Rad
(×10-3)

5cm

10cm

20cm

40cm

Adj.R²

Tree

P1

 

 

 

0.00

 

-0.03

0.43

1.57

0.41

-0.02

0.18

 

0.50

 

P2

 

 

 

0.21

0.20

 

 

0.62

0.31

 

0.00

 

0.18

0.64

 

P3

 

 

 

 

0.00

 

-0.01

1.03

2.92

0.34

 

0.01

 

-0.08

0.36

 

P4

 

 

 

 

0.00

 

-0.41

0.69

1.67

0.31

 

 

 

-0.07

0.40

 

P5

-0.07

 

 

0.25

0.10

 

 

0.13

0.43

 

 

 

0.59

 

P6

 

 

 

0.55

0.30

 

-0.02

0.06

0.08

0.44

 

 

 

0.56

0.62

 

P7

 

 

 

0.26

0.16

 

-0.16

0.15

1.84

0.44

 

-0.03

 

0.21

0.53

 

P8

-0.01

 

 

0.23

0.15

 

 

0.09

-0.02

0.44

-0.01

 

0.08

0.09

0.66

 

T1

 

 

 

0.00

 

 

 

 

 

 

 

 

 

0.00

 

T2

 

-1.62

 

1.45

0.48

 

-0.12

1.52

0.15

 

-0.41

 

0.86

0.61

 

T3

 

-1.58

 

0.91

0.35

 

-0.84

-0.15

-3.09

0.34

 

-1.10

 

0.74

0.61

 

T4

 

-1.15

 

0.48

0.26

 

 

 

-1.09

0.32

 

-0.59

 

0.17

0.50

 

T5

 

-0.98

 

0.55

0.35

 

 

 

-0.01

0.25

 

-0.72

 

0.41

0.45

 

T6

 

-1.64

0.56

0.49

0.22

 

-0.62

0.68

-1.80

0.45

 

-0.97

0.61

0.70

 

T7

 

-0.45

 

0.51

0.19

 

-0.19

0.16

-0.01

0.41

 

 

0.10

0.62

 

T8

 

-1.57

 

1.17

0.40

 

-0.11

-3.92

0.20

 

-0.50

 

0.78

0.62

Grass

(-Tc)

G1

13.3

 

-2.7

-6.3

0.12

 

-1.00

-88.7

-2.7

-0.39

10.3

-8.57

0.37

0.97

G2

25.6

 

-4.7

-8.8

0.19

 

-82.8

18.6

-0.03

10.4

-3.31

 

-1.76

0.98

G3

24.9

 

-2.2

-10.5

0.17

 

1.41

-76.8

32.2

-0.79

2.4

 

 

0.95

G4

14.8

 

-3.6

-4.9

0.14

 

-7.40

-87.5

26.9

-0.42

1.4

-0.48

 

 

0.98

Grass

(-ΔT)

G1

0.39

-1.49

0.8

0.01

0.07

 

-0.42

9.5

-5.3

-0.30

10.5

-8.83

0.53

 

0.36

G2

1.53

 

 

 

0.14

 

 

14.8

13.4

 

10.9

-3.69

 

-1.56

0.54

G3

1.72

 

 

 

0.13

 

7.33

14.8

18.7

-0.61

4.5

 

 

-0.01

0.42

G4

2.59

-0.31

 

0.01

0.11

 

-7.66

8.3

19.1

-0.39

3.2

-1.00

 

 

0.31

Note: Coefficients equal to 0 are omitted; values in bold denote cases where non-zero coefficients resulted in ≥ 90% of runs (N = 100)


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