Figures & data
FIGURE 1 The mean number of nests per plot and 95% confidence interval as a function of (a) fertilizer treatment (averaged over all plant densities) and (b) plant density (averaged over the three fertilizer levels) in the field competition experiment. In (a), columns sharing the same letter are not significantly different (P < 0.05, Student's t). The control shown in (b) are those plots that did not undergo density manipulation but did have the three fertilizer treatments.
FIGURE 2 The mean number of voles captured per plot and 95% confidence interval during the June trapping session in (a) the fertilized and unfertilized plots and (b) the fenced and unfenced plots at the Boutellier Summit and Microwave Road sites. Columns sharing the same letter are not significantly different (Student's t, P < 0.05).
FIGURE 3 The mean number of voles captured per trap and the 95%confidence interval for traps with and without fertilizer included in the standard barley + apple bait.
FIGURE 4 The number of traps entered per day (solid line and solid circle) and the total fertilizer removed (g) per day (dotted line and open circle). There was no correlation between number of traps entered and total mass of fertilizer removed (r = 0.356, P = 0.212). If only the first 9 days are used for analysis, then r = 0.616 and P = 0.077.
FIGURE 5 Mean mass of fertilizer removed (g trap-1) and 95% confidence interval depending on the number of tracks going into and out of the traps. There is no statistical difference between these classes (Wilcoxon Test, P = 0.471).
