SNC1DW Chapter 3
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The number and variety of life forms, including species, found within a specific region as well as all the number and variety of ecosystems within and beyond that region.
To guard legally from harm a species that is listed as endangered, threatened, or of special concern.
e.g. White Trilliums are protected in Ontario because it is the provincial flower.
A place where there is an exceptionally large number of species in a relatively small area
All the populations of the different species that interact in a specific area or ecosystem.
Species that are so abundant that they have the biggest biomass of any community number
A species that can greatly affect population numbers and the health of an ecosystem.
e.g. Sea Otters and Prarie Dogs
The breeding of rare or endangered wildlife in controlled settings to increase the population size.
e.g. Black-Footed Ferrets
A species that causes such dramatic changes to landscapes that it creates a new ecosystem
e.g. Beavers and Desert Beetles (in Mexico)
The series of changes in an ecosystem that occurs over time, following a disturbance
e.g. The area of a beaver pond changes from forest, to flooded forest, to a sunny pond.
The destruction of habitats, which usually results from human activities
The practice of clearing forests for logging or other human uses, and never replanting them
A series that is accidentally or deliberately introduced to a new location.
e.g. Zebra Mussels and Round Gobies
A species that can take over the habitat of native species
e.g. Round Gobies reproduce quickly and take up a large amount of space in a little amount of time
The use or extraction of a resource until it is depleted
e.g. Overfishing and overhunting can lead to major population declines
The death of all the individuals of a species
e.g. Dinosaurs and Dodo Birds are two famous extinct species
The current accelerated rate of extinctions
e.g. some species of trees, amphibians, birds and mammals are at a risk of extinction
The renewal of degraded or destroyed ecosystems through active human intervention
The regrowth of a forest, either through natural processes or through the planting of seeds or trees in an area where a forest was cut down
The use of a species to control the population growth or speed of an undesirable species
e.g. The parasitoid was known to control the Gypsy Moth caterpillar population by laying its eggs inside it
The use of living organisms to clean up contaminated areas naturally
e.g. Certain plants have properties that collect poisons and store them in their tissues
The use of organisms to add essential nutrients to depleted soils
e.g. Clover can be used to replenish nitrogen levels in soil
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