Identification of habitat controls on northern red-legged frog populations: implications for habitat conservation on an urbanizing landscape in the Pacific Northwest

Ecological Processes

Table 1 Variables used in R. aurora occurrence and abundance models and their descriptive variation

Abbreviation	Description (units)	\( \overline{\upchi} \)	\( \tilde{\upchi} \)	SD	IQR	CV	Range
AREA	Wetland area (ha)	0.75	0.80	0.51	1.02	0.68	0.02–1.49
BULL	Bullfrog presence (bullfrog occupied or not)	0.32	0.00	0.48	1.00	1.48	0–1
CON	Aquatic/terrestrial landscape connectivity	98.19	99.58	2.46	3.63	0.03	90.28–99.98
EMG	Wetland area in emergent vegetation (m²)	2565	1464	2493	3458	0.97	61–9482
FISH	Fish presence (fish occupied or not)	0.32	0.00	0.48	1.00	1.48	0–1
FRP	Perimeter of wetland adjacent to forest (%)	46.28	48.10	32.75	54.41	0.71	0–100
PCF	Percent forest within 5 km of wetland (ln[%])	46.23	47.76	22.33	37.81	0.48	10.64–85.77

Descriptive variables are the mean (\( \overline{\upchi} \)), median (\( \tilde{\upchi} \)), standard deviation (SD), interquartile range (IQR), and coefficient of variation (CV)