| A | B |
|---|
| ecology | the study of the relationships of organisms with each other and the environment |
| population | group of the same species living in a given area |
| community | population of different organisms that live together |
| ecosystem | community together with the non living factors in the environment |
| biomes | major terrestrial areas with common animals and plants and climate, cover wide geographical areas |
| most common type of population distribution | clumped |
| dispersion | the way in which populations are arranged |
| carrying capacity | the number of individuals that can be supported at a given area, ossicilates around a mean |
| density dependent factors | depend on the size of the population, hormone release |
| density independent factors | weather of physical disruption |
| r strategists | early first reproduction, large brood size, no parental care |
| k strategists | parental care, delay reproduction, smaller brood, live longer |
| humna population growth is | exponential |
| age distribution | proportion of individuals in different age categories tends to be stable |
| survivorship | percentage of original population that survives to a given age |
| mortality | rate of death |
| Type I curve | highest mortality occurs late in life |
| Type II curve | individuals are likely to die equally at any age |
| Type III curve | many die right when born then the rate of death becomes slow |
| demography | statictical study of a population |
| interspecific competition | usually greatest between species that get their food the same way |
| intraspecific competition | competition between individuals in the same species |
| competitive exclusion | if 2 species compete for the same limited resource, one species |
| parasitism | organism living in or on another organism |
| if the predator eliminates its prey, it will | become extinxt itself |
| niche | the role the organism plays in the environment |
| realized niche | actual niche, when competitors are present |
| fundamental niche | role when predators are not present |
