Terms : Hide Images
| 5174821483 | abundance | When one species is found in large quantities in an ecosystem | 0 | |
| 5174821484 | commensalism | A relationship between two organisms in which one organism benefits and the other is unaffected | 1 | |
| 5174821489 | complexity | The number of different species in each trophic level and the number of different tropic levels in a ecosystem | 2 | |
| 5174821490 | competition | Interaction among organisms that want the same resource in an ecosystem. Major evolutionary pressure. Could be inter or intra specific. | 3 | |
| 5174821517 | tolerance limits | The limit of a variable at which a particular species cannot survive or is unable to reproduce | 4 | |
| 5174821518 | territoriality | When a species partitions an area to as to lessen intraspecific competition | 5 | |
| 5174821519 | symbiosis | A close relationship between two species that benefits at least one of the species. | 6 | |
| 5174821520 | stability | A situation in which things continue without any major changes or problems | 7 | |
| 5174821521 | specialist | A consumer that primarily eats one specific organism or feeds on a very small number of organisms; disruptions to environment are catastrophic to survival | 8 | |
| 5174821522 | secondary succession | A type of succession that occurs where an existing community has been cleared by some disturbance that leaves the soil intact. | 9 | |
| 5174821523 | resource partitioning | The differentiation of niches that enables similar species to coexist in a community | 10 | |
| 5174821524 | resiliance | the ability of an organism to recover from stress or pressure | 11 | |
| 5174821525 | tolerance limits | For each abiotic factor, an organism has a set range of tolerances within which it can survive | 12 | |
| 5174821526 | realized niche | Part of a species fundamental niche that it actually uses, limited by competition. | 13 | |
| 5174821527 | primary succession | Process by which a community arises in a virtually lifeless area with no soil | 14 | |
| 5174821528 | primary productivity | Rate at which organic matter is created by producers in an ecosystem | 15 | |
| 5174821532 | predation | An interaction in which one organism kills another for food. Anything that consumes another living organism is a predator. | 16 | |
| 5174821533 | pioneer species | First species to populate an area during primary succession | 17 | |
| 5174821535 | natural selection | A natural process resulting in the evolution of organisms best adapted to the environment. | 18 | |
| 5174821537 | parasitism | A symbiotic association in which one organism benefits while the other is harmed. | 19 | |
| 5174821538 | mutualism | A relationship between two species in which both species benefit | 20 | |
| 5174821539 | keystone species | A species that influences the survival of many other species in an ecosystem | 21 | |
| 5174821540 | intraspecific competition | Competition among members of the same species | 22 | |
| 5174821541 | interspecific competition | Competition between members of different species | 23 | |
| 5174821542 | generalist | a species with a broad niche that can tolerate a wide range of conditions and can use a variety of resources; highly adaptable to environmental disturbances | 24 | |
| 5174821543 | Introduced species | Non-native species in an area; may take over niches of native species in an area and eventually replace them. (invasive) | 25 | |
| 5174821544 | native species | Species that have naturally evolved in an area | 26 | |
| 5174821545 | fundamental niche | The full potential range of conditions and resources a species could theoretically use if there was no competition from other species | 27 | |
| 5174821546 | fire-climaxed communities | biome characterized by periodic fires every few years, followed by secondary succession (Chapparal) | 28 | |
| 5174821547 | evolution | Change over time | 29 | |
| 5174821549 | edge effect | different conditions along the boundaries of an ecosystem | 30 | |
| 5174821550 | ecotone | A transitional zone where ecosystems meet. edge effect | 31 | |
| 5174821551 | succession | Gradual change in organisms that occurs when the environment changes | 32 | |
| 5174821552 | niche | Full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions | 33 | |
| 5174821553 | diversity | A measurement of the number of species inhabiting an ecosystem. | 34 | |
| 5174865926 | Batesian Mimicry | Harmless species evolve characteristics that mimic unpalatable or poisonous species | 35 | |
| 5175232954 | Mullerian Mimicry | Two unpalatable species evolve to look alike | 36 | |
| 5175234284 | Aposmatic Coloration | Warning coloration | 37 | |
| 5175241498 | Law of Competitive Exclusion | No two species will occupy the same niche and compete for exactly the same resources for an extended period of time. | 38 | |
| 5175256297 | Punctuated Equilibrium | Species evolve in bursts rather than a gradual steady pace. Species may go long periods of time without evolving Contrary to Darwin's original theory Species evolve in correlation with pressure and available genes. | 39 | |
| 5175258516 | Speciation | Evolution of a new species | 40 | |
| 5175260306 | Allopatric Speciation | Results from geographic isolation Sharing of genetic material is no longer possible because of geographic barriers | 41 | |
| 5175260307 | Sympatric Speciation | Results from behavioral isolation Sharing of genetic material is no longer possible because of differences in behavior Speciation takes place while these species are in the same physical space. | 42 | |
| 5175266126 | Disruptive Selection | Selection for both extremes and against moderate traits | 43 | |
| 5175269140 | Stabilizing Selection | Selection for moderate traits and against both extremes | 44 | |
| 5175272602 | Directional Selection | Selection for one extreme and against the other extreme | 45 |
