Friday, April 27, 2007

What Accounts for Introduction Success?

In a letter published in Nature, Blackburn and Duncan (2001) showed that the likelihood of bird introductions being successful is determined by abiotic environmental factors at the release site. An excerpt from the abstract:
using a global data set of historical bird introductions, [the authors] . . . show that the pattern of avian introduction success is not consistent with the biotic resistance hypothesis [i.e., species-rich mainland and tropical locations are harder to invade]. Instead, success depends on the suitability of the abiotic environment for the exotic species at the introduction site.
Blackburn, Tim M., and Richard P. Duncan. 2001 (November 8). Determinants of establishment success in introduced birds. Nature 414: 195-197.

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