| A | B |
|---|
| Population | A group of organisms of the same species that live in a specific geographical area |
| Carrying Capacity | The largest population that an environment can support at a given time |
| Logistic Growth | Occurs when a population’s exponential growth slows or stops. |
| Exponential Growth | also known as J-shaped |
| Predation | An interaction between two organisms in which one organism (the predator) kills another (the prey) |
| Coevolution | The evolution of two or more species that is due to mutual influence |
| Parasitism | A relationship between two species where one benefits and the other species is harmed |
| Symbiosis | A relationship in which two organisms live in close association |
| Mutualism | A type of symbiosis where both organisms benefit |
| Commensalism | A type of symbiosis where one organism benefits and the other is neither helped nor harmed |
| Herbivory | organisms consuming plants |
| Niche | The unique position occupied by a species, both in terms of its physical use of its habitat and its function within an ecological community |
| Fundamental niche | The largest ecological niche where an organism or species can live without competition |
| Realized Niche | The range of resources that a species uses, the conditions that the species can tolerate, and the functional roles that the species plays as a result of competition in the species’ fundamental niche. |
| Competitive Exclusion | The exclusion of one species by another due to competition |
| Keystone species | A species that is critical to the function of the ecosystem in which it lives because it affects the survival and abundance of many other species in its community |
