Biological Invasions

Question 1

Invasive Species

Answer 1

Non-indigenous species whose introduction does or is likely to cause economic or environmental harm or harm to human health

can cause extirpation

Question 2

Panama

Answer 2

formed land bridge, species can move back and forth
abiotic, biotic interaction

canals will do this too

Question 3

examples

Answer 3

monkeys - South America
bats - Australia
rats - all over

Question 4

Common elements of invasions (5)

Answer 4

Source location of species –> transport + introduction –> establishment –> spread –> impact

ecological interaction
transport and spread are similar, just on different scales

Question 5

Establishment

Answer 5

environmental characteristics required for a species to persist

Question 5

Environmental Interactions

Answer 5

introduction of highly flammable plants increase wildfire risk
any fire, increases number of cheatgrass, highly flammable

as climate warms, exacerbates diseases

Question 6

Species Distribution Models

Answer 6

SDM uses environmental variables + data as correlates of biological invasions (establishment)

prediction!

Question 7

Pests + economic impacts

Answer 7

local govy pays most to take care of urban trees affected by pests because people care most about those

Question 8

Management Options

Answer 8

prevention (most effective, hard)
early detection
control and slow the spread
human adaption, genetic modification

campaigns, money, prioritize

we don’t know what the risks are, but important to control before it becomes a big issue