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Chapter 3

ecology

TermDefinition
Natural Resources Anything naturally occurring in the environment that humans use.
Pollution Contamination of Earth's land, water, or air.
Point Source A specific source of pollution that can be identified.
Nonpoint Source A widely spread source of pollution that is difficult to link to a specific point or origin.
Environmental Science The study of the natural processes that occur in the environment and how humans can affect them.
Renewable Resources A resource that is either always available or is naturally replaced in a relatively short time.
Nonrenewable Resources A natural resource that is not replaced in a useful time frame.
Sustainable use The use of a resource in ways that maintain the resource at a certain quality for a certain period in time.
Ecological Footprint The amount of land and water used that individuals use to meet their resource needs and to absorb the waste that they produce
Conservation The practice of using less id a resource so that it can last longer
Exponential Growth Growth pattern in which individuals in the population reproduce at a constant rate so that larger a population gets so that the larger a population gets the faster it grows
Clear-Cutting The process of cutting down all the trees in an area at once
Selective Cutting The process of cutting down only some tree species in an area
Sustainable Yield The use of a resource in ways the maintain the resource at a certain quality for a certain period in time
Fishery An area with a large population of valuable ocean organisms
Aquacultur The practice of raising fish and other water-dwelling organisms for foods.
bio diversity the number of different species in an area
keystone species influences to survival of many other species in an ecosystem
gene are located in cells and carry hereditary information that determines an organisms traits
extinction the disappearance of all species from Earth
endangered species Species in danger of become extinct in the near future
threatened species species that could become endangered species in the near future
habitat destruction the loss of a natural habitat
habitat fragmentation the breaking of a habitat into a smaller,isolated peices
poaching illegal killing or removal of wildlife from their habitats
captive breeding the matting of animals in zoos or wildlife preserves
Created by: jac201020918