Predicting an invasion and it's impact
Eurasia to North America
Latin America to Florida
Asia to Hawaii
Europe as "Old World"
Europeans brought their "home" to the "New World"
More invasive species have been invasive to the "New World" than to t
History and Attitudes
It's difficult to determine an invasive species
In California, there are many introduced species that scientists have just come to a decision that
some species that are native.
As long as humans have been on earth, they've been movin
Why Deliberately Introduce?
Sense of home
Utilitarian (of services to human)
Brought from another place for food
Shot and killed, sometimes for kill
o Landscape control
Erosion control, ch
Exotic vs. Invasive
Humans have put these species in an environments. Humans have
created favorable conditions that have allowed the species to inhabit a
All invasives are exotic, not all exotics ar
Releasing your pets
People try to domesticate their pets
No person purposely planted or released a species in a non-native