Appendix C. Akaike weights of the models explaining breeding success by Tree Swallows at seven spatial scales along a gradient of agricultural intensification in southern Québec, 2004–2006.
TABLE C1. Akaike weights of the models explaining breeding success by Tree Swallows at seven spatial scales along a gradient of agricultural intensification in southern Québec, 2004–2006. Models are linear mixed models with farm ID as random effect. See Table 1 for variable definition and justification.
Scale (km) |
Brood or Clutch |
Intensive Culture |
Extensive Culture |
Weather |
Weather + Intensive |
Weather + Extensive |
Brood or Clutch + Weather |
Brood or Clutch + Intensive |
Brood or Clutch + Extensive |
|
Clutch size |
1 |
0.017 |
0.983 |
0.001 |
- |
- |
- |
- |
- |
- |
2 |
0.027 |
0.972 |
0.001 |
- |
- |
- |
- |
- |
- |
|
3 |
0.043 |
0.951 |
0.007 |
- |
- |
- |
- |
- |
- |
|
4 |
0.011 |
0.981 |
0.008 |
- |
- |
- |
- |
- |
- |
|
5 |
0.014 |
0.980 |
0.006 |
- |
- |
- |
- |
- |
- |
|
10 |
0.025 |
0.964 |
0.012 |
- |
- |
- |
- |
- |
- |
|
20 |
0.005 |
0.740 |
0.256 |
- |
- |
- |
- |
- |
- |
|
Hatching probability |
1 |
0.132 |
0.000 |
0.000 |
0.000 |
0.000 |
0.000 |
0.035 |
0.625 |
0.208 |
2 |
0.529 |
0.000 |
0.000 |
0.000 |
0.000 |
0.000 |
0.138 |
0.233 |
0.100 |
|
3 |
0.582 |
0.000 |
0.000 |
0.000 |
0.000 |
0.000 |
0.152 |
0.147 |
0.120 |
|
4 |
0.545 |
0.000 |
0.000 |
0.000 |
0.000 |
0.000 |
0.143 |
0.091 |
0.222 |
|
5 |
0.512 |
0.000 |
0.000 |
0.000 |
0.000 |
0.000 |
0.134 |
0.079 |
0.276 |
|
10 |
0.613 |
0.000 |
0.000 |
0.000 |
0.000 |
0.000 |
0.160 |
0.108 |
0.118 |
|
20 |
0.538 |
0.000 |
0.000 |
0.000 |
0.000 |
0.000 |
0.141 |
0.267 |
0.055 |
|
Number of fledglings |
1 |
0.069 |
0.041 |
0.715 |
0.012 |
0.008 |
0.155 |
- |
- |
- |
2 |
0.019 |
0.117 |
0.682 |
0.003 |
0.025 |
0.153 |
- |
- |
- |
|
3 |
0.004 |
0.014 |
0.808 |
0.001 |
0.003 |
0.171 |
- |
- |
- |
|
4 |
0.001 |
0.001 |
0.834 |
0.000 |
0.000 |
0.164 |
- |
- |
- |
|
5 |
0.002 |
0.003 |
0.840 |
0.000 |
0.001 |
0.154 |
- |
- |
- |
|
10 |
0.124 |
0.277 |
0.424 |
0.022 |
0.058 |
0.096 |
- |
- |
- |
|
20 |
0.009 |
0.061 |
0.727 |
0.002 |
0.014 |
0.187 |
- |
- |
- |
|
Fledging probability |
1 |
0.370 |
0.039 |
0.241 |
0.128 |
0.007 |
0.033 |
0.064 |
0.018 |
0.100 |
(Likelihood that a |
2 |
0.129 |
0.038 |
0.481 |
0.045 |
0.006 |
0.065 |
0.022 |
0.016 |
0.198 |
hatchling fledged) |
3 |
0.063 |
0.015 |
0.576 |
0.022 |
0.002 |
0.078 |
0.011 |
0.006 |
0.227 |
4 |
0.019 |
0.004 |
0.636 |
0.007 |
0.001 |
0.086 |
0.003 |
0.002 |
0.243 |
|
5 |
0.042 |
0.006 |
0.608 |
0.015 |
0.001 |
0.083 |
0.007 |
0.002 |
0.237 |
|
10 |
0.019 |
0.004 |
0.636 |
0.007 |
0.001 |
0.086 |
0.003 |
0.002 |
0.243 |
|
20 |
0.483 |
0.072 |
0.100 |
0.168 |
0.011 |
0.015 |
0.083 |
0.030 |
0.040 |
Notes: mAICc weights depict the relative strength of each model for a given spatial scale (i.e., radius).
List of models and their variables:
Clutch size (n = 912):
Clutch = year + clutch initiation date
Intensive = year + clutch initiation date + water + intensive culture + manure tanks + intensive culture × manure tanks
Extensive = year + clutch initiation date + water + extensive culture + manure tanks + extensive culture × manure tanks + cattle + extensive culture × cattle
Hatching probability (n = 912):
Clutch = year + clutch initiation date + eggs laid
Weather = year + clutch initiation date + temperature + precipitations
Clutch + Weather = year + clutch initiation date + eggs laid + temperature + precipitations
Intensive = year + clutch initiation date + water + intensive culture + manure tanks + intensive culture × manure tanks
Extensive = year + clutch initiation date + water + extensive culture + manure tanks + extensive culture × manure tanks + cattle + extensive culture × cattle
Intensive + Clutch = year + clutch initiation date + eggs laid + water + intensive culture + manure tanks + intensive culture × manure tanks
Intensive + Weather = year + clutch initiation date + temperature + precipitations + water + intensive culture + manure tanks + intensive culture × manure tanks
Extensive + Clutch = year + clutch initiation date + eggs laid + water + extensive culture + manure tanks + extensive culture × manure tanks + cattle + extensive culture × cattle
Extensive + Weather = year + clutch initiation date + temperature + precipitations + water + extensive culture + manure tanks + extensive culture × manure tanks + cattle + extensive culture × cattle
Number of fledglings (n = 715):
Brood = year + clutch initiation date
Weather = year + clutch initiation date + temperature + precipitations
Intensive = year + clutch initiation date + water + intensive culture + manure tanks + intensive culture × manure tanks
Extensive = year + clutch initiation date + water + extensive culture + manure tanks + extensive culture × manure tanks + cattle + extensive culture × cattle
Intensive + Weather = year + clutch initiation date + temperature + precipitations + water + intensive culture + manure tanks + intensive culture × manure tanks
Extensive + Weather = year + clutch initiation date + temperature + precipitations + water + extensive culture + manure tanks + extensive culture × manure tanks + cattle + extensive culture × cattle
Fledging probability (n = 715):
Brood = year + clutch initiation date + chicks born
Weather = year + clutch initiation date + temperature + precipitations
Brood + Weather = year + clutch initiation date + chicks born + temperature + precipitations
Intensive = year + clutch initiation date + water + intensive culture + manure tanks + intensive culture × manure tanks
Extensive = year + clutch initiation date + water + extensive culture + manure tanks + extensive culture × manure tanks + cattle + extensive culture × cattle
Intensive + Brood = year + clutch initiation date + chicks born + water + intensive culture + manure tanks + intensive culture × manure tanks
Intensive + Weather = year + clutch initiation date + temperature + precipitations + water + intensive culture + manure tanks + intensive culture × manure tanks
Extensive + Brood = year + clutch initiation date + chicks born + water + extensive culture + manure tanks + extensive culture × manure tanks + cattle + extensive culture × cattle
Extensive + Weather = year + clutch initiation date + temperature + precipitations + water + extensive culture + manure tanks + extensive culture × manure tanks + cattle + extensive culture × cattle