Ecological Archives E096-083-A3

Sarah M. Emery, Lukas Bell-Dereske, and Jennifer A. Rudgers. 2015. Fungal symbiosis and precipitation alter traits and dune building by the ecosystem engineer, Ammophila breviligulata. Ecology 96:927935. http://dx.doi.org/10.1890/14-1121.1

Appendix C. Statistical results for repeated measures general linear mixed models examining the effects of the presence of an endophyte symbiont in Ammophila breviligulata (Endophyte, E+/E-) and precipitation manipulation (reduced, ambient, or augmented rainfall) on A. breviligulata plant traits.

Table C1. Statistical results for repeated measures general linear mixed models examining the effects of the presence of an endophyte symbiont in Ammophila breviligulata (Endophyte, E+/E-) and precipitation manipulation (reduced, ambient, or augmented rainfall) on A. breviligulata plant traits. Spatial location coordinates within the dune blowout (Column, Row) were included as covariates. The two numbers for degrees of freedom indicate 2010–2013 data for tiller numbers, and 2011–2013 data for all other responses. Significant variables at p < 0.05 are in bold.

   

Tillers per plot

Leaves per tiller

Ave. leaf length

Inflorescence number

Source

df

Mean Square

F

P

Mean Square

F

P

Mean Square

F

P

Mean Square

F

P

Endophyte

1

53.97

23.25

<0.001

0.19

1.17

0.284

0.55

0.01

0.929

13.84

16.80

<0.001

Precipitation

2

5.55

2.39

0.099

0.69

4.19

0.020

39.89

0.57

0.566

1.14

1.38

0.259

Endophyte × Precipitation

2

1.60

0.69

0.504

0.04

0.24

0.789

16.14

0.23

0.793

1.95

2.37

0.102

Year

3/2

739.01

1477.9

<0.001

1.14

9.98

<0.001

11342.9

267.5

<0.001

159.82

395.3

<0.001

Year × Endopyte

3/2

5.61

11.21

<0.001

0.21

1.86

0.159

13.06

0.31

0.736

3.06

7.58

<0.001

Year × Precipitation

6/4

0.66

1.31

0.251

0.06

0.53

0.714

16.45

0.39

0.817

0.72

1.78

0.136

Year × Endophyte × Precipitation

6/4

0.65

1.30

0.261

0.004

0.04

0.998

30.36

0.72

0.582

0.74

1.82

0.128

Column

14

1.56

0.67

0.793

0.29

1.73

0.071

86.23

1.24

0.269

1.30

1.57

0.111

Row

6

3.54

1.53

0.183

0.42

2.55

<0.028

312.2

4.49

<0.001

1.44

1.76

0.122

Year × Column

42/28

1.67

3.35

<0.001

0.13

1.12

0.328

30.59

0.72

0.841

1.28

3.16

<0.001

Year × Row

18/12

6.02

12.05

<0.001

0.20

1.77

0.059

3645.5

85.99

<0.001

3.63

8.98

<0.001

Error

256/
192

0.50

   

0.11

   

56.091

42.40

 

0.404

   

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