Table 1. Variability estimates for amphibian populations.
Values are coefficients of variation (standard deviation/mean)
for detrended count series.
Study	Species	Years	C.V.
Frogs and Toads
Gittins 1983	Bufo bufo	5	0.20
Beebee et al. 1996	Bufo calamita	9	0.50
Dodd 1995	Gastrophryne carolinensis	5	0.41
Pechmann et al. 1991	Pseudacris ornata	11	0.85
Weitzel & Panik 1991	Pseudacris regilla	15	0.52
Berven 1990	Rana sylvatica	6	0.72
Salamanders, Pond-breeders
Husting 1965	Ambystoma maculatum	5	0.31
Pechmann et al. 1991	Ambystoma opacum	11	0.85
Pechmann et al. 1991	Ambystoma talpoideum	11	0.97
Pechmann et al. 1991	Ambystoma tigrinum	11	0.52
Macan 1977	Triturus helveticus	16	0.73
Macan 1977	Triturus helveticus	18	0.79
Terrestrial and Streamside Salamanders
Hairston & Wiley 1993	Desmognathus monticola	15	0.27
Hairston & Wiley 1993	Desmognathus ochrophaeus	15	0.26
Hairston & Wiley 1993	Desmognathus oeneus	15	0.48
Hairston & Wiley 1993	Desmognathus quadramaculatus	15	0.45
Jaeger 1980	Plethodon cinereus	13	0.22
Hairston & Wiley 1993	Plethodon glutinosus	15	0.45
Hairston 1983	Plethodon jordani	8	0.10
Hairston & Wiley 1993	Plethodon jordani	15	0.20