ACAP Supporting Materials

The following figures were originally published in the 2007 paper “Global rates of habitat loss and implications for amphibian conservation”. The paper provided the basis for much of the information presented in Chapter II of the ACAP.

Gallant, A. L., Klaver, R. W., Casper, G. S. and M. J. Lannoo. 2007. Global rates of habitat loss and implications for amphibian conservation. Copeia 4: 967–979.

The 21 ecoregions used in this assessment (note that Greenland and Antarctica have been excluded because they lack amphibians). Originally published in Gallant et al., 2007.

Amphibian species richness. The map legend depicts classes of species richness, where each successive class represents twice the number of species as the previous class. Originally published in Gallant et al., 2007.

Maps of human population growth rates for three time intervals. There is a general decrease through time in growth rates for countries in temperate and higher latitudes in contrast to a substantial increase in human population growth rates in tropical latitudes. Originally published in Gallant et al., 2007.

(A) Percent change in the extent of closed-canopy forest cover since pre-settlement conditions (referenced to 1996). (B) Number of extirpated and threatened tree species as of the 1990s. Originally published in Gallant et al., 2007.

(A) Changes in cropland area from 1961–1997. (B) Change in the percent of cropland that was irrigated during 1961–1997. (C) Percent change in average annual fertilizer usage during 1961–1997. Originally published in Gallant et al., 2007.

Composite rates of population-, agricultural-, and forest-related change. The resulting patterns show the relative magnitude of the rates at which the landscape is being altered in ways that are likely detrimental to amphibian habitat. To generate the composite map, rates of change in the source maps (1 km resolution) were transformed to values from 1 (very low rate of change) to 5 (very high rate of change). The mean value was calculated across the source maps for each grid cell to yield this composite map. Originally published in Gallant et al., 2007.