Science Chapter 3
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- The number and variety of organisms found in an specific region
- e.g. About 5000 species of plants have been identified in Canada.
- To protect or guard a species that is endangered or threatened.
- e.g. black rhino
- Where there is an exceptionally large number of living species in a small area
- e.g. Carolinian Canada in southwestern Ontario
All populations of different species that interact in a specific area or ecosystem.
- Species that have the biggest biomass of any community member
- In terrestrial ecosystems primary producers are always the dominant species
- Removing dominant species results in a decrease in biodiversity
- A species that greatly affects population numbers, and health of an ecosystem.
- Generally not abundant
- E.g. Sea otters, prairie dogs
- The breeding of rare or endangered species, in a controlled setting, to increase population size.
- E.g. ferrets
- Species that cause such dramatic changes to landscapes that they create a new ecosystem
- E.g. Beavers
Series of changes in an ecosystem that occurs over time, following a disturbance
When an ecosystems alter so much by natural disasters or human activities, that some species can no longer survive there
Occurs when forests are cleared out for human use., and never replanted
- Species that are introduced to new parts of the biosphere from other regions
- May be released on purpose or accidentally
- Anything that is not native
- Invasive species that take over the habitat of native species.
- e.g. zebra mussels
- Use or extracting a resource until its depleted
- e.g. over fishing of Atlantic cod
- Death of all individuals of a species
- e.g. saber tooth tiger
The current accelerated rate of extinction on earth
The renewal of degraded or destroyed ecosystems through active human intervention
Regrowth of a previously cut down forest, through natural process or through planting of seeds
- Use of a species to control population growth or spread of an undesirable species
- e.g. Use of an European fly to control forest pests
- The use of living organisms to clean up contaminated areas naturally
- e.g. Use of plants to absorb heavy metals from toxic soil
- The use of living organisms to add essential nutrients to depleted soils
- e.g. Use of clover to add nitrogen to depleted soils
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