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Definition
| An association of interacting species inhabiting some defined area. |
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Definition
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Term
| The structure of communities (Community Structure) consists of several attributes including: |
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Definition
1) Types of Species
2) Relative abundance of species
3) Species diversity |
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Definition
| A group of organisms that make their living in a similar way. |
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Definition
• Seed eating animals in an area of a desert.
• Filter feeding invertebrates in a steam
• Fruit eating birds on many South Pacific Islands |
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Term
| Relative Abundance of Species |
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Definition
| --Most species are moderately abundant --only a few are extremely rare or extremely abundant |
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Term
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Definition
| the number of species in the community |
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Term
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Definition
| The relative abundance of species |
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Term
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Definition
| refers to the diversity within a particular area or ecosystem, and is usually expressed by the number of species (i.e., species richness) in that ecosystem. |
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Term
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Definition
| the total number of species that are unique to each of the ecosystems being compared. |
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Definition
| is a measure of the overall diversity for the different ecosystems within a region. |
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Term
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Definition
| A chart used by ecologists to display relative species abundance, a component of biodiversity. It can also be used to visualize species richness and species evenness. |
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Term
| Density / Resource Relationship |
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Definition
| Decrease in diversity the more resources |
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Term
| How do species assemble into communities locally? |
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Definition
Appointment: Dividing the resources
Immigration, regional species pool. |
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Term
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Definition
| Unified neutral theory of biodiversity. |
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Term
| Disturbance Effects on Species Diversity |
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Definition
| Discrete event in time that disrupts ecosystem, community, or population structure and changes resources, substrate availability, or the physical environment. Has to be departure from normal (e.g. fire, earthquakes, etc...) |
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Term
Intermediate Disturbance Hypothesis
-Frequent disturbance |
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Definition
| Community dominated by few species that are good colonizers |
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Term
Intermediate Disturbance Hypothesis
-Rare Disturbance |
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Definition
| Community dominated by species that are good competitors. |
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Term
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Definition
| Species Abundance distributions and patterns of diversity can arise from purely neutral processes. |
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