| A | B |
|---|
| People who study where species are located | Biogeographers |
| Place that provides all needs for an organism | Habitat |
| all living things in an area | biotic factors |
| all non-living things in an area | abiotic factors |
| people who study the ecosystem | ecologists |
| things that cause populations to change in size | death rate birth rate |
| moving into a population | immigration |
| leaving a population | emigration |
| prevents a population from increasing | limiting factors |
| maximum population an area can hold | carrying capacity |
| where a river meets a sea | estuary |
| northern biome cold and dry | tundra |
| number of different species in an area | biodiversity |
| direction of energy flow in an energy pyramid | up |
| lives in of causes harm | parasite |
| at least one species benefits | symbiosis |
| both species benefit | mutalism |
| organisms role or part in the ecosystem | niche |
| traits that allow survival | adaptations |
| from nature limited supply | nonrenewable |
| species carried by people to a new location | exotic |
| all biotic & abiotic factors in an area | ecosystem |
| weather pattern - long term | climate |
| areas with similar climate | biome |
| carnivore that eats dead organisms | carnivore |
| located in the middle of the U.S. | grasslands |
| best suited to survive | natural selections |
| plant eater | hebavore |
| most numerous in a food web | producers |
| overlapping food chains | food webs |
| resources replaced by nature | renewable |
| resources from nature used by us | natural |
