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Appendix A. A figure showing mean and standard error scatter sample points of earthworm biomass (ash-free dry biomass) by species in relation to sample point position for each study site in each sample year.

FIG. A1. Mean and standard error scatter sample points of earthworm biomass (ash-free dry biomass) by species in relation to sample point position for each study site in each sample year. The standardized Mantel statistic (r) indicates the strength of the relationship between sample point position and earthworm biomass and the associated P value indicates the significance of that relationship (N = 45 per site).