invasive species

an organism that is introduced to an area in which it would not have naturally lived

non-native species

a species introduced to an area in which it

would not naturally be found

native species

• This is the opposite of non-native species. There is no definition to go with this card.

overpopulation

a situation that occurs when a population

becomes too great in number for the area they occupy, so that resources

become scarce

grazers

herbivores that usually feed on grass

extinction

the death of all members of a species

deforestation

to cut down trees in a forest

conservation

using natural resources wisely in order to

protect them

pollution

Waste that harms air, land, or water

poaching

to hunt or fish illegally

overfishing

to excessively exhaust the supply of fish