Table 1. Variability estimates for amphibian populations.
Values are coefficients of variation (standard deviation/mean)
for detrended count series.
StudySpeciesYearsC.V.
Frogs and Toads
Gittins 1983Bufo bufo50.20
Beebee et al. 1996Bufo calamita90.50
Dodd 1995Gastrophryne carolinensis50.41
Pechmann et al. 1991Pseudacris ornata110.85
Weitzel & Panik 1991Pseudacris regilla150.52
Berven 1990Rana sylvatica60.72
Salamanders, Pond-breeders
Husting 1965Ambystoma maculatum50.31
Pechmann et al. 1991Ambystoma opacum110.85
Pechmann et al. 1991Ambystoma talpoideum110.97
Pechmann et al. 1991Ambystoma tigrinum110.52
Macan 1977Triturus helveticus160.73
Macan 1977Triturus helveticus180.79
Terrestrial and Streamside Salamanders
Hairston & Wiley 1993Desmognathus monticola150.27
Hairston & Wiley 1993Desmognathus ochrophaeus150.26
Hairston & Wiley 1993Desmognathus oeneus150.48
Hairston & Wiley 1993Desmognathus quadramaculatus150.45
Jaeger 1980Plethodon cinereus130.22
Hairston & Wiley 1993Plethodon glutinosus150.45
Hairston 1983Plethodon jordani80.10
Hairston & Wiley 1993Plethodon jordani150.20