Chapter 3 - Ecology Kamalvir Pablay
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The number and variety of biotic organisms found within a specific region as well as the number and variety of ecosystems within and beyond that region
To legally guard a species that is considered one of the following:
- -Special Concern
Example: Tigers are on the verge of extinction, so they need protection
A place where there is a larger amount of biodiversity in a small area than normal
Example: Lake Malawi
All the populations of the different species that interact in a specific area or ecosystem.
Example: Lake Ontario is a community
An abundant species that have the largest biomass in a community.
Example: Kangaroo Rats
A species that creates a huge difference in the health of an ecosystem and its population numbers.
Example: Sea otters are a keystone species because they consume sea urchins
When a species is rare or endangered in wildlife so it is brought into a safe place where everything is controlled to be bred until a specific population number is reached.
Example: Black-Footed Ferrets were under a captive breeding program
A species that causes dramatic changes in an ecosystem such as changing the landscape to the point where a new ecosystem is created.
Example: Beavers because they create dams in streams of water that other organisms use to survive and thrive
The series of changes in an ecosystem that occurs over time, following a disturbance.
Example: Flooded forests caused by beavers
The destruction of habitats, which usually results from human activities
Example: Deforestation, causing the loss of the habitats for birds, insects and other animals
When forests (or a forest) is cleared for human uses and not replanted, leading to erosion, climate change, and more.
A species that is accidentally, or purposely brought into a new location where it is not native.
Example: Zebra Mussels were accidentally brought in to North America
A species (usually an alien species) that takes over a habitat for/of native species
Example: Zebra Mussels are an invasive species
The use or extraction of a resource until it is depleted
Example: Passenger Pigeons were overexploited by hunters in the early 1900s
Graph of the Angry Bears and their decline to becoming endangered
The death of a population and all of its species.
Example: Passenger Pigeons have gone extinct
The accelerated rate of extinctions
The renewal of destroyed or abandoned ecosystems through active human intervention
Example: The Don Valley Brick Works has been effected by Restoration Ecology
The regrowth of a forest through 2 ways
- 1) Natural Processes
- 2) Planting of seeds or trees in an area where a forest was cut down
The use of an alien species to control the population growth or spread of an undesirable species.
Example: Parasitoid fly was brought in to control the European gypsy moth
The use of biotic organism to clean up contaminated ares naturally
Example: Bioremedation is used at contaminated sites such as gas stations to clean up the soil of toxins
The use of organisms to add essential nutrients to depleted soils
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