threats to biodiversity-- invasive species

Question 1

what is a non-native species?

Answer 1

species that do not originate in the area or region

Question 2

what 4 ways is a non-native species introduced into a new environment?

Answer 2

• accidentally in shipments
• economic
• control other species
• release of pets

Question 3

what is an invasive species?

Answer 3

a non-native species that has a negative impact on the natural environment

Question 4

usually, what happens to a non-native species?

Answer 4

they cannot tolerate their new environment and do not survive

Question 5

occasionally, what happens to a non-native species?

Answer 5

they survive but have no negative impact on the ecosystem

Question 6

when do non-native species become invasive species?

Answer 6

when there is a negative impact

Question 7

why does the population of invasive species grow very quickly?

Answer 7

there are very few abiotic and biotic factors that stop them from growing

Question 8

what are 4 negative impacts of invasive species?

Answer 8

• population of native species will decrease because of higher competition for food
• infect native species with disease
• damage forests / farmland / fisheries
• change the local environment

Question 9

what 3 ways can be used to minimize invasive species?

Answer 9

• chemical method (pesticide)
• mechanical method (physical barrier)
• biological method (introducing a predator)

Question 10

what is the problem with the chemical method?

Answer 10

pesticides hurt other organisms

Question 11

what is the problem with the mechanical method?

Answer 11

the barrier is not 100% effective

Question 12

what is the problem with the biological method?

Answer 12

the predator may eat other species