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16 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Biological community |
The assemblage of living organisms that occupies a particular region or habitat |
-Community refers only to the living or biotic component -Size of a community is usually defined by the investigator |
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Transition area |
Location where one community "gives way" to another |
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General properties of communities |
1. Communities are not completely closed systems 2. Communities exhibit differentiation (=3) 3. The members of a community interact with each other 4. Communities are dynamic |
(=4) |
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Communities are not completely closed systems |
- involved in energy and chemical flow in ecosystems - communities differ in their "self- sufficiency" |
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Communities exhibit differentiation |
a) horizontal differentiation b) vertical differentiation c) temporal differentiation |
(=3) |
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Horizontal differentiation |
Patchy or mosaic distribution of plant and animal populations |
Deciduous forest community |
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Vertical differentiation |
- stratification of plant and animal populations - separation of species into layers by height |
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Temporal differentiation |
Different functions at different times (of day or season) |
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Members of a community interact with each other |
a) intraspecific interactions b) interspecific interactions |
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Interspecific interactions |
Among members off different species - organisms constantly interact with individuals of other species - many such interactions are indirect |
Lunch at Burger King |
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Intraspecific interactions |
among members of the same species |
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Communities are dynamic |
communities are constantly changing their composition a) abiotic disturbance b) biotic change |
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composition |
the species present and the abundance of individuals within each species |
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abiotic disturbance |
? |
wild fire natural disasters |
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biotic change |
natural change in the absence of disturbance - individuals die and are replaced - when an individual is replaced by a different species, composition changes - communities change naturally as they age |
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Succession |
A series of replacements of one type of community by another |
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