topic 9 - ecosystems (biodiversity and humans)

Question 1

fish farming

Answer 1

growing fish in a contained area, usually to supply humans with food

Question 2

indigenous/native

Answer 2

organisms that have been introduced to an area

Question 3

non-indigenous

Answer 3

organisms that have been introduced to an area where they haven’t been before

Question 4

overfishing

Answer 4

taking more fish from a population than are replaced by the fish reproducing so that the population number falls each year

Question 5

how do non-indigenous species reduce biodiversity

Answer 5

they compete with indigenous species for resources like food and shelter. sometimes they are better at getting these resources and out-compete the indigenous species, decreasing the number of them and die out.

Question 6

what do non-indigenous species sometimes bring to habitats

Answer 6

new diseases, they can often infect and kill lots of indigenous species,reducing the species biodiversity