Ecological Archives E086-103-A3

Josh Van Buskirk. 2005. Local and landscape influence on amphibian occurrence and abundance. Ecology 86:1936–1947.

Appendix C. Pearson correlation coefficients among habitat covariates.

Variable
Pond permanence
Vegetation
Canopy cover
Predation risk
Fish density
Forest cover
Urban area
Pond permanence
---
-0.07
0.18
0.21
0.11
-0.02
0.24
Vegetation
-0.04
---
-0.31
0.36
0.02
-0.22
0.02
Canopy cover
0.37
-0.30
---
-0.04
0.05
0.19
0.27
Predation risk
0.16
0.18
0.14
---
-0.03
0.04
0.21
Fish density
0.21
0.01
0.03
-0.02
---
0.01
0.24
Landscape forest cover
0.04
-0.18
0.04
0.04
0.08
---
0.03
Landscape urban area
0.39
0.10
0.27
0.25
0.18
-0.08
---

   Notes: A seventh variable, density of competitors, was not included because its value for each pond differs among species. Results for May are above the diagonal (N = 321 pond-sampling records), and July data are below the diagonal (N = 205 records).


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