Ecological Archives E089-193-A1

Carsten F. Dormann, Oliver Purschke, Jaime R. García Márquez, Sven Lautenbach, and Boris Schröder. 2008. Components of uncertainty in species distribution analysis: A case study of the Great Grey Shrike. Ecology 89:3371–3386.

Appendix A. Correlation matrix (Pearson’s r) of the 12 (standardized) environmental variables. The threshold for significance lies at 0.1, i.e., most correlations are significant.

	Slope	Percentage bogs	Percentage grassland	Percentage poor open land	Percentage forest	Percentage arable land	Number of habitats	Distance to rivers	Distance to settlements	Percentage sandy soil	Mean annual temperature	Summer precipitation
Slope	1	–0.08	0.55	–0.04	0.42	–0.49	0.43	–0.26	–0.18	–0.35	–0.82	0.86
Percentage bogs	–0.08	1	0.04	0.16	0.34	–0.27	0.33	0.03	0.24	0.38	–0.03	0.01
Percentage grassland	0.55	0.04	1	–0.2	–0.01	–0.04	0.51	–0.23	–0.35	–0.18	–0.54	0.56
Percentage poor open land	–0.04	0.16	–0.2	1	0.20	–0.40	0.15	–0.24	0.25	0.17	0.13	–0.07
Percentage forest	0.42	0.34	–0.01	0.20	1	–0.78	0.18	0.03	0.50	0.35	–0.43	0.43
Percentage arable land	–0.49	–0.27	–0.04	–0.40	–0.78	1	–0.18	0.19	–0.30	–0.12	0.51	–0.54
Number of habitats	0.43	0.33	0.51	0.15	0.18	–0.18	1	–0.32	–0.28	0.01	–0.26	0.36
Distance to rivers	–0.26	0.03	–0.23	–0.24	0.03	0.19	–0.32	1	0.22	0.09	0.11	–0.17
Distance to settlements	–0.18	0.24	–0.35	0.25	0.50	–0.30	–0.28	0.22	1	0.43	0.03	–0.11
Percentage sandy soils	–0.35	0.38	–0.18	0.17	0.35	–0.12	0.01	0.09	0.43	1	0.31	–0.34
Mean annual temperature	–0.82	–0.03	–0.54	0.13	–0.43	0.51	–0.26	0.11	0.03	0.31	1	–0.91
Summer precipitation	0.86	0.01	0.56	–0.07	0.43	–0.54	0.36	–0.17	–0.11	–0.34	–0.91	1

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