Biology Reference
In-Depth Information
Fig. 2.20
Geographic variation in numbers of reptile and amphibian introductions to recipient
regions, measured either as all introductions (solid bars) or only those leading to successfully
established populations (open bars). “Europe” excludes the islands of the Mediterranean and
Atlantic, which are considered separately
Fig. 2.21
Relative rates of successful population establishment of introduced reptiles and
amphibians into each geographic region. “Europe” excludes the islands of the Mediterranean and
Atlantic, which are considered separately
and North America, both regions heavily populated with scientists and informed
amateurs and both liable to the reporting of anomolous herpetological findings. This
difference likely reflects the less hospitable climate of Europe for many introduced
reptiles and amphibians, making their chances of successful establishment lower.
