Florida Entomologist (2013) 96, 765-769

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Nan-Yao Su (2013)
How to become a successful invader
Florida Entomologist 96 (3), 765-769
Abstract: Most invasive species hitchhike on human transportation, and their close associations with human activity increase their chances of uptake. Once aboard, potential invaders have to survive the journey, and those with traits such as being a general feeder or tolerance to a wide range of environmental conditions tend to survive the transportation better. Similar traits are generally considered to also aid their establishment in new habitats, but studies showed that the propagule pressure, not any of the species-specific traits, is the most important factor contributing to their successful establishment. Higher propagule pressure, i.e., repeated invasions of larger numbers of individuals, reduces Allee effects and aids the population growth of invasive species in alien lands. Coined as the invasive bridgehead effect, repeated introduction also selects a more invasive population that serves as the source of further invasions to other areas. Invasive species is the consequence of homogenocene (our current ecological epoch with diminished biodiversity and increasing similarity among ecosystems worldwide) that began with the Columbian Exchange of the 15th century and possibly the Pax Mongolica of the 13-14th century. Anthropogenic movement of goods among major cities will only accelerate, and the heightened propagule pressure will increase the number of invasive species for as long as the current practices of global commercial activities continue.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
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Database assignments for author(s): Nan-Yao Su

Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology
new introduction of pest


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.
Coptotermes formosanus
Solenopsis invicta
Cryptotermes brevis
Xenopsylla cheopis
Cactoblastis cactorum