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 96:927–935. 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 |
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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/ |
0.50 |
0.11 |
56.091 |
42.40 |
0.404 |
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