Ecological Archives M071-005-A9

Y. K. Lin and G. O. Batzli. 2001. The influence of habitat quality on dispersal, demography, and population dynamics of voles. Ecological Monographs 71:245-275.

 

Table A9. Two-way ANOVA tables with repeated measures for mean age structure of prairie vole populations in manipulated habitat patches (Fig. 10). Experimental manipulations included mowing (cover) and supplemental feeding (food) in a 2 X 2 factorial design with 4 replicates. Elevation (2 replicates upslope and 2 downslope) used as a third factor, but not in tables because it had no significant effects. Estimates of mean age structure repeated early (weeks 8-14) and late (weeks 16-22) in the season.

Proportion adults (transformed)

Source d. f. Sum of squares F-ratio P
Food 1 103 3.59 0.082
Cover 1 287 9.99 0.008
F X C 1 0.763 0.027 0.873
Subjects (groups) 12 345    
Season 1 115 4.99 0.045
F X S 1 59.5 2.58 0.134
C X S 1 153 6.65 0.024
F X C X S 1 21.3 0.925 0.355
Season X subjects (groups) 12 277    
Total 31 1362    

Proportion subadults (transformed)

Source d. f. Sum of squares F-ratio P
Food 1 1.27 0.081 0.780
Cover 1 69.9 4.47 0.056
F X C 1 25.6 1.64 0.224
Subjects (groups) 12 188    
Season 1 1.96 0.101 0.756
F X S 1 2.62 0.135 0.720
C X S 1 60.0 3.09 0.104
F X C X S 1 6.78 0.349 0.566
Season X subjects (groups) 12 233    
Total 31 589    

Proportion juveniles (transformed)

Source d. f. Sum of squares F-ratio P
Food 1 184 12.9 0.004
Cover 1 265 18.6 0.001
F X C 1 25.5 1.79 0.206
Subjects (groups) 12 171    
Season 1 154 10.5 0.007

F X S 1 37.0 2.52 0.138
C X S 1 68.9 4.70 0.51
F X C X S 1 4.87 0.332 0.575
Season X subjects (groups) 12 176    
Total 31 1086    

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