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Appendix S1. Analysis of early summer abundance of voles.

Fig SA1. Wavelet analysis of vole trapping carried out in early summer (June) in the Kirkkonummi population. Plotted are the wavelet power spectra for the dynamics of (panel a) the bank vole, and panel (b) the field vole, and (panel c) the cross-wavelet power spectrum for both species. See caption of Fig. 2 for a detailed explanation of these plots.

Fig SA2. Wavelet analysis of vole trapping carried out in early summer (June) in the Heinola population. Plotted are the wavelet power spectra for the dynamics of (panel a) the bank vole, and panel (b) the field vole, and (panel c) the cross-wavelet power spectrum for both species. See caption of Fig. 2 for a detailed explanation of these plots.

Appendix S2. Wavelet analysis of published data.

Fig. SB1. Wavelet analysis of data published by Korpimäki et al. (2005, summation of data in their Fig. 1a and b) on vole abundance in western-central Finland from 1977–2003. Plotted are the wavelet power spectra for the dynamics of (panel a) the bank vole, and panel (b) the field vole, and (panel c) the cross-wavelet power spectrum for both species. See caption of Fig. 2 in the main text for a detailed explanation of these plots.

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