Ecological Archives E096-189-A3
Pedro Daleo, Juan Alberti, Carlos Martín Bruschetti, Jesús Pascual, Oscar Iribarne, and Brian R. Silliman. 2015. Physical stress modifies top-down and bottom-up forcing on plant growth and reproduction in a coastal ecosystem. Ecology 96:2147–2156. http://dx.doi.org/10.1890/14-1776.1
Appendix C. Results of linear mixed-effects models evaluating the effect of nutrients, herbivory and salinity on clonal and sexual reproduction of the salt marsh plant Spartina densiflora.
Table C1. Results of linear mixed-effects models evaluating the effect of Nutrients, Herbivory and Salinity on clonal and sexual reproduction of the salt marsh plant Spartina densiflora. Nutrients, salinity and herbivory were treated as fixed factors and plot was treated as random factor.
Source of variation
df
F
P
Number of stems
Nutrients (N)
1, 20
210.48
< 0.001
Salt (S)
1, 20
8.68
< 0.01
Herbivory (H)
1, 19
0.06
0.812
N × S
1, 20
4.95
< 0.05
N × H
1, 19
15.35
< 0.001
H × S
1, 19
0.91
0.351
N × H × S
1, 19
0.46
0.506
Number of spikes
N
1, 20
112.13
< 0.001
S
1, 20
3.79
0.067
H
1, 19
8.59
< 0.01
N × S
1, 20
0.25
0.623
N × H
1, 19
29.88
< 0.001
H × S
1, 19
0.18
0.673
N × H × S
1, 19
0.07
0.789
Spike to stem ratio
N
1, 20
21.44
< 0.001
S
1, 20
0.71
0.411
H
1, 19
16.49
< 0.001
N × S
1, 20
0.11
0.740
N × H
1, 19
47.28
< 0.001
H × S
1, 19
0.001
0.972
N × H × S
1, 19
0.01
0.917
Internode length
N
1, 20
89.56
< 0.001
S
1, 20
1.39
0.253
H
1, 19
3.54
0.075
N × S
1, 20
0.03
0.866
N × H
1, 19
4.60
0.045
H × S
1, 19
34.35
< 0.001
N × H × S
1, 19
12.82
< 0.005