L19. Mass migration and importation of alien species

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
- important because: cause loss in biodiversity, physical changes, industrial impacts, aesthetics, property values, lots of money per year

Question 2

Ecology of invasions

Answer 2

• look for common elements
• how can we predict invasions : look at methods of transport and introduction

5 steps:
- source location of species
- transport/introduction
- establishment
- spread
- impact

Question 3

Ship movements as pathway of invasion

Answer 3

• like envr200
• shipping is super big thing that happens all the time
• method of ships picks up water and then dumps it out in other places

Question 4

Commerce in Living organisms as pathway of invasion

Answer 4

• live animal imports
• exotic pets
• aquarium fish invasion

Question 5

Observing establishment

Answer 5

• species distribution models (uses environmental variables as correlates of biological invasions (usually establishment)
• needs to be the right environmental characteristics required for a species to persist

Question 6

prevention opportunities

Answer 6

• white/black lists act as a risk screening tool
• eradication (not easy)
• control: integrated pest management