| A | B |
|---|
| Ecology | The study of the interactions between living organisms and their nonliving environment |
| Abiotic | Nonliving factors |
| Biotic | living factors |
| Population | A group of the same species or kind of organism |
| Habitat | An area where an organism live |
| Niche | The role the organism plays in its environment or What an organism eats and the role it plays in the ecosystem |
| Community | All of the different populations in an ecosystem |
| Competition | Where two species (kinds of organisms) have the same habitat or niche |
| Predation | One species kills and eats another |
| Invasive Species | A species that is not native to that area that then takes over part of its new habitat |
| Symbiosis | Interaction between two species |
| Mutualism | Both species or organisms benefit |
| Parasitism | One species or organism lives off another |
| Commensalism | Only one organism benefits the other is not effected |
| Autotroph | Self feeding-gets its energy from non-living source |
| Heterotroph | Eating other-Gains its energy from other living things |
| Herbivore | Energy comes from eating plants |
| Carnivore | Energy comes from eating animals |
| Pioneer Species | Among the first species to colonize a newly opened area |
| Omnivore | A species that eats both plants and other animals to get energy |
| Decomposer | Organisms that get their energy from decaying material |
| Primary Consumer | The first consumer on the food chain |
| Secondary Consumer | The second consumer on the food chain |
| Tertiary Consumer | The third consumer on the food chain |
| Trophic Level | Their position on the food chain |
| Energy Pyramid | A model that shows the numbers of organisms in a food chain |
| Food Web | Picture that shows the inter-ralationships of many organisms in an ecosystem |
| Food Chain | A picture showing one way the energy pathway from organism to organism |
| Density | Number of organism in a given area |
| Dispersion | How organisms in a ecosystem are spread out |
| Density-Independent | Factors not influenced by a populations density |
| Density-Dependent | Factors that are influenced by a populations density |
| Immigration | Individuals moving into an area |
| Emmigration | Individuals moving out of an area |
| Logistic growth | Shown by populations growing very very quickly |
| Carrying Capacity | How large of a population an area can support given its resources |
| Biosphere | The portion of the earth that supports life |
| Ecologist | Person that studies what takes place in the biosphere |
| Organism | An individual living thing. |
| Ecosystem | A location that includes all of its abiotic and biotic factors |
| Biome | A large group of ecosystems that share a climate |
