. Montana amphibian and reptile status assessment, literature review, and conservation plan. Amphibians; Reptiles; Indicators (Biology); Habitat (Ecology); Wildlife conservation. Figure 1 illustrates the differences between range extent and area of occupancy. '.V *V. • •• • • • ••• •V ul/. n /[* /* w r/m W * A * & V^z ZK fS&^Jtli .-3E^i^ Z27«^ ¥ r * < t I • /m • • , .V • H Figure 1. Two examples of the distinction between range extent and area of occupancy. (A) Is the spatial distribution of known, inferred or projected sites of present occurrence. (B) Shows one possible boundary to
. Montana amphibian and reptile status assessment, literature review, and conservation plan. Amphibians; Reptiles; Indicators (Biology); Habitat (Ecology); Wildlife conservation. Figure 1 illustrates the differences between range extent and area of occupancy. '.V *V. • •• • • • ••• •V ul/. n /[* /* w r/m W * A * & V^z ZK fS&^Jtli .-3E^i^ Z27«^ ¥ r * < t I • /m • • , .V • H Figure 1. Two examples of the distinction between range extent and area of occupancy. (A) Is the spatial distribution of known, inferred or projected sites of present occurrence. (B) Shows one possible boundary to the range extent, which is the measured area within this boundary using a minimum convex polygon. [Note that Burgman and Fox (2001) strongly recommend the use of a- hulls rather than minimum convex polygons to estimate range extent as otherwise significant overestimates (, right side of example B) may result.] (C) Shows one measure of area of occupancy, which can be achieved by the sum of the occupied grid squares. (From IUCN2001) Range Extent Enter the code that best describes the estimated current range of the species in Montana. See below for definitions of range extent (extent of occurrence) and for contrast of this with area of occupancy. Select from the following values: Z = Zero (no occurrences believed extant) A = <100 km (less than about 40 square miles) B = 100-250 km2 (about 40-100 square miles) C = 250-1,000 km2 (about 100-400 square miles) D = 1,000-5,000 km2 (about 400-2,000 square miles) E = 5,000-20,000 km2 (about 2,000-8,000 square miles) F = 20,000-200,000 km2 (about 8,000-80,000 square miles) G = 200,000-2,500,000 km2 (about 80,000-1,000,000 square miles) U = Unknown Null = Rank factor not assessed 18. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ma
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Keywords: ., booksubjectamphibians, booksubjectreptiles, booksubjectwildlifec
