Term
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Definition
| a group of populations of different species living close enough to interact |
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Term
| what does interspecific mean? |
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Definition
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Term
| give 4 examples of interspecific interactions that occur in communities |
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Definition
| competition, predation, herbivory, symbiosis |
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Term
| what are the types of symbiosis |
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Definition
| parasitism, mutualism, commenalism |
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Term
| what is the principle of competitive exclusion? |
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Definition
| even a slight reproductive advantage will eventually lead to local elimination of the inferior competitor |
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Term
| what does niche overlap lead to? |
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Definition
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Term
| what is a realized niche? |
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Definition
| resources that a species currently uses |
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Term
| what is a fundamental niche? |
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Definition
| resources that a species can use |
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Term
| how do niches allow peaceful interspecific communities? |
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Definition
| allows for limited resources to be partitioned according to differential needs |
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Term
| define Character Displacement |
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Definition
| differences b/w similar characteristics in two species living in the same geographic area are accentuated |
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Term
| coloration of an animal and mimcry are examples of what? |
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Definition
| defensive adaptations to avoid preadation |
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Term
| what effect do allelochemicals have on herbivores |
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Definition
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Term
| what effect do semiochemicals have oon herbivores? |
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Definition
| communicate info to attract predator of the herbivore |
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Term
| what is the number of different species in a community called? |
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Definition
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Term
| what is Relative Abundance |
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Definition
| the proportion each species represent of all individuals in the community |
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Term
| what does the trophic structure (feeding relationships) of an ecosystem determine? |
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Definition
| route of energy flow and pattern of chemical cycling. |
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Term
| what does a food web represent? |
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Definition
| interconnected feeding relationships in an ecosystem |
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Term
| what does a food web represent? |
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Definition
| interconnected feeding relationships in an ecosystem |
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Term
| what is a dominant species? |
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Definition
| species that are the most abundant or have the highest biomass in a community |
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Term
| what is a Keystone Species |
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Definition
| species that exert strong control on community structure by pivotal ecological roles or niches |
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Term
| what is a Foundation Species (aka Facilitators) |
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Definition
| species that dramatically alter their physical environment on a large scale (ex: beaver) |
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Term
| how does a disturbance change a community? |
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Definition
| by removing organisms from it or altering resource availability |
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