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| a group of species living close enough together for potential interaction |
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| the study of interactions among all populations in a common environment |
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| An organimsms ecological role |
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| If a species is removed, then another species will take over, but since the first species out competes the other one, it excludes the second species from its fundamental niche |
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| competition, predation/parasitism, mutualism, commensalism |
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| An ecological relationsip between organisms of two different species living in direct contact |
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| Compete for limited resource (-,-) |
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| one benefits while the other is hurt |
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| one benefits, the other isn't hurt or helped |
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| when harmless species mimics harmful species |
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| when two harmful species mimic eachother |
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| a species that has a great impact and regulation on entire ecosystem, not necessarily the most abundant or dominant species |
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Definition
| the sequence of community changes after a disturbance |
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Definition
begins without soil: on bare rock; after volcano glaciation, on rock
bacteria, grasses, shrubs, trees |
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| Existing community is cleared, but soil is intact |
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Definition
pioneer species colonize first
pioneer species alter the environmental conditions
eventually new species of plants become established and displace pioneer plants
animals come in with or after plants they need to survive
further environmental change by new plants and animals result in establishment of diff. species
disturbance of the ecosystem will start it again |
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