Model tested for detecting factors influencing cache densities based on fixed distance sampling investigations.

Abbreviations: NC = cache density, SDP = sample distance to nearest Korean pine stand, SP = sample plot, ε = residual.The first model was selected as final explanatory model according to minimum AICc values. Statistical tests of the model: Year effect, df = 4, χ2 = 612.31, Pdf = 1, χ2 = 27.22, Pdf = 3, χ2 = 870.54, P