Variables affecting likelihood of survivorship | B† | S.E | Walddf | P | Variation explained by model (%) |
Instar 2: |
|
||||
M | -0.65 | 0.29 | 4.981 | 0.026 | |
E | -0.69 | 0.30 | 5.461 | 0.019 | |
Constant | -1.11 | 0.22 | 26.171 | <0.001 | |
Instar 3: |
|
||||
E × Ma | -0.94 | 0.39 | 5.741 | 0.017 | |
M × Pb | 0.75 | 0.35 | 4.591 | 0.032 | |
Trial | 22.483 | <0.001 | |||
Trial 1 | -0.18 | 0.37 | 0.231 | 0.632 | |
Trial 2 | -1.10 | 0.47 | 5.541 | 0.019 | |
Trial 3 | 1.19 | 0.40 | 8.811 | 0.003 | |
Constant | -1.38 | 0.27 | 25.271 | <0.001 | |
Instar 4: |
|
||||
P | 1.04 | 0.44 | 5.541 | 0.019 | |
Trial | 10.843 | 0.013 | |||
Trial 1 | 0.66 | 0.51 | 1.651 | 0.199 | |
Trial 2 | -1.02 | 0.71 | 2.041 | 0.153 | |
Trial 3 | 1.31 | 0.63 | 4.361 | 0.037 | |
Constant | -2.94 | 0.50 | 34.781 | <0.001 | |
Instar 5: |
|
||||
M | -1.10 | 0.41 | 7.291 | 0.007 | |
E | -1.20 | 0.61 | 4.591 | 0.048 | |
E × P | 2.56 | 0.63 | 16.501 | <0.001 | |
Trial | 16.703 | 0.001 | |||
Trial 1 | 1.43 | 0.50 | 8.121 | 0.005 | |
Trial 2 | -0.52 | 0.59 | 0.771 | 0.398 | |
Trial 3 | 1.42 | 0.72 | 4.011 | 0.049 | |
Constant | -1.87 | 0.47 | 15.711 | <0.001 | |
Note: Variables
in the initial model included mycorrhizal infection (M), foliar endophyte infection
(E), phosphorus fertilization rate (P), all two- and three-way interactions
of the above, and trial. Variables with P > 0.10 were eliminated from
the models in a stepwise manner, starting with the variable with the largest
P value (Norusis 1993).
† Positive B indicates survivorship
was higher in the presence of infection / at high P / in trial 4.
aLarval survivorship (pooled across P treatments) in
-M-E treatments = 87%
-M+E treatments = 74%
+M-E treatments = 82%
+M+E treatments = 80%
bLarval survivorship (pooled across E treatments) in
low P, -M treatments = 77%;
low P, +M treatments = 81%;
high P, -M treatments = 85%;
high P, +M treatments = 81%
Literature cited
Norusis, M. J. 1993. SPSS for Windows advanced statistics. SPSS, Chicago, Illinois, USA.