Chapter 35 vocab
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19 terms
Terms | Definitions |
|---|---|
 Age structure | proportion of people in different age groups in a population |
| Carrying capacity | number of organisms in a population that an environment can maintain |
| Commensalism | symbiotic relationship in which one organism benefits, while the other organism is neither harmed nor helped |
| Competitive exclusion | one species succeeding over another when the growth of both species is limited by the same resource |
| Density-dependent factor | factor that limits a population more as population density |
| Density-independent factor | factor unrelated to population density that limits a population |
| Ecological succession | series of changes in the species in a community, often following a disturbance |
| Exponential growth | growth of a population that multiplies by a constant factor at constant time intervals |
| Interspecific competition | competition between species that depend on the same limited resource |
| Introduced species | species moved by humans to new geographic areas, either intentionally or accidentally |
| Limiting factor | condition that restricts a population's growth, such as space, disease, and food availability |
| Mutualism | type of symbiotic relationship in which both organisms involved benefit |
| Niche | unique living arrangement of an organism defined by its habitat, food sources, time of day it is most active, and other factors |
| Parasitism | relationship in which a parasitic organism obtains its food at the expense of a host organism |
| Population density | number of individuals of a particular species per unit area or volume |
| Predation | interaction in which one organism consumes another |
| Primary succession | process by which a community arises in a virtually lifeless area with no soil |
| Secondary succession | change following a disturbance that damages an existing community but leaves the soil intact |
| Symbiotic relationship | close interaction between species in which one species lives in or on the other |
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