Phillip Cassey

TL;DR: Propagule pressure is proposed as a key element to understanding why some introduced populations fail to establish whereas others succeed and how the study of propagule pressure can provide an opportunity to tie together disparate research agendas within invasion ecology.

TL;DR: It is shown that alien species are the second most common threat associated with species that have gone completely extinct from these taxa since AD 1500, and for vertebrate extinctions overall.

TL;DR: It is shown that the probability that a bird species has been extirpated from each of 220 oceanic islands is positively correlated with the number of exotic predatory mammal species established on those islands after European colonization and that the effect of these predators is greater on island endemic species.

TL;DR: It is confirmed that avian species with larger brains, relative to their body mass, tend to be more successful at establishing themselves in novel environments and provided evidence that larger brains help birds respond to novel conditions by enhancing their innovation propensity rather than indirectly through noncognitive mechanisms.

TL;DR: It is argued that ‘propagule pressure’, a key term in invasion biology, has been attributed at least three distinct definitions, with the result that the distinct importance of these different concepts has been at best diluted, and at worst lost.