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General Biology
Chapter 4 - Ecosystems and Communites
| Question | Answer |
|---|---|
| The ability of a species to survive and reproduce under a range of environmental circumstances | Tolerance |
| The general area an organism lives | habitat |
| an organism's occupation or role in an ecosystem and also how it interacts with biotic and abiotic factors | Niche |
| any necessity of life | resource |
| when organisms compete for the same resource | competition |
| States that no two species can occupy the same niche in the same habitat at the same time | Competitve exclusion principal |
| when one organism captures and feed on another animal | predation |
| the organism that is captured and fed upon | prey |
| interaction in which one animal feeds on producers | herbivory |
| species whose sudden absence inthe community can cause drastic changes | Keystone species |
| any relationship in which two species live closely together | Symbioses |
| relationship in which both species benefit ex. hippo/bird or protists/termites or lichens/trees | mutualism |
| relationship in which one organism lives inside or on another organism and harms it. ex tapeworm | parasitism |
| relationship in which one organism benefits and the other is neither helped or harmed ex. bird nest in trees | commensalism |
| setries of more-or-less predictable changes that occur in a community over time | Ecological Succession |
| succession that begins in an area with no remnants of an older community (one that lacks topsoil_ | primary succession |
| first species to colonize a barren area ex. lichens | pioneer species |
| succession that occurs where a disturbance affects an already existing community (one with topsoil) | secondary succession |
| Aqutic succession in fresh water | Euptrophication |
| a mature, stable commumnity that does not undergo further succession | Climax communities |
| large areas that are characterized by a certain climax community (certain plants, animals, and climate) | Biome |
| climate in a small area that differs from the area arount it | Mictroclimate |
| The maximum number of individuals of a particular species that a particula r environment cona support | carrying capacity |
| factor that controls the growth of a population | Limiting facotrs |
| the limiting factor that depends on a population's size, or in other words a factor that has a greater impace the larger the population density size | Density-dependent limiting factors |
| competition between differnet species | interspecific competition |
| competition within the same species | intraspecific competition |
| limiting factors that affect allpopulation in similar ways, regardless of population size. EX weather, seasons, natural disasters | Density-independant limiting factors |