Ingolf Steffan-Dewenter and Susanne Schiele. 2008. Do resources or natural enemies drive bee population dynamics in fragmented habitats? Ecology 89:1375–1387.

Appendix B. Effects of population size on rate of parasitism of O. rufa populations during the study period 1998–2003.

FIG. B1. Effects of population size on rate of parasitism (arcsine √p) of O. rufa populations during the study period (1998–2003). Results of simple linear regressions with correlation coefficient r and significance level (* P < 0.05, ** P < 0.01, *** P < 0.001) are given in each graph. Only sites with more than 10 brood cells were included in the analysis. Further statistics see Table 3.