Lecture 23

Question 1

What is an invasive species?

Answer 1

A non-Indigenous species whose introduction does or is likely to cause economic or environmental harm or harm to human health.

Question 2

What are the steps to the ecology of invasions?

Answer 2

1. Source location of species.
2. Transport/introduction.
3. Establishment.
   - environmental characteristics required for a species to persist.
4. Spread.
5. Impact.

Question 3

What are the two types of pathways of invasion?

Answer 3

1. Transportation related.

2. Commerce in living organisms.

Question 4

What is the species distribution model (SDM)?

Answer 4

SDM uses environmental variables as correlates of biological invasions (usually establishments). Elements to predict how species move in different areas.

Modeling the spread of organisms across the area - humans play a crucial role in the secondary spread.

Question 5

What is argued as the most effects management options of invasive species? What is another management strategy?

Answer 5

Prevention is most effective to avoid damages - cost-effective.

Eradication.