introducing alien species

Question 1

what is an alien species?

Answer 1

an animal or plant that has been introduced into a country it does not originate from

Question 2

what are the disadvantage of an invasive alien species?

Answer 2

. may grow faster than native species and upset the natural ecosystem
. native species may not be able to compete

Question 3

what are some problems that alien species could cause ?

Answer 3

. if no predators for the alien species it could grow out of control
. alien species could compete with native species causing the native species to die out
. alien species could pray on native species reducing their number
. alien species could carry a disease that could affect the native species

Question 4

whats an example of an alien species in britain?

Answer 4

japanese knotweed- introduced into britain as an ornamental plant but is now a pest species as it has no natural enemies