Bird Extinctions Occurring Faster Than Previously Believed
12 Percent of All Bird Species Could Be Extinct By End of 21st Century ...
Commercial Extinction
A term usually referring to marine animals, commercial extinction is the depletion of a population of species to the point where fisherman cannot catch enough of them to earn profit.
Extinction (of light) The loss of light due to scattering and absorption as it passes through the atmosphere.
Extinction: Complete disappearance of a species because of failure to adapt to environmental change.
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Extinction Coefficient - A measure of the rate of the reduction of transmitted light through a substance. [Journal of Physics D: Applied Physics; v23; 1735; 1990.] [Applied Optics; v30; 4824; 1991.] ...
EXTINCTION "Extinction" is the term used to describe the total disappearance of a species from the earth. Extinction occurs naturally, and often as a result of environmental changes.
Global Extinction
The complete and permanent loss of an animal species across the entire planet.
Global Warming ...
commercial extinction - the depletion of a population to the point where fisherman cannot catch enough to be economically worthwhile.
communities of color - Hispanic, black or Asian people or groups living together or connected in some way.
I am in danger of extinction because the sea ice where I live is melting. I was recently added to the list of threatened species in the United States. By the way, I live only in the Arctic and not in the Antarctic, as some people think! What am I?
Taxa in danger of extinction and whose survival is unlikely if the causal factors continue operating.
Definition source
Former IUCN Redlist Category ...
Maximum sustainable yield (MSY) The maximum crop or yield that can be removed repeatedly from a population without driving it towards extinction.
threatened species species whose surviving numbers are so low that they would become threatened with extinction if they declined further.
This quantity is sometimes called extinction, although the term extinction, better called attenuance, is reserved for the quantity which takes into account the effects of luminescence and scattering as well.
Corrected from [3] ...
Endangered species: A species threatened with extinction.
Environment: All of the external factors, conditions, and influences which affect an organism or a community.
Tree species are very rarely threatened with extinction. However, this issue has particular relevance to those of us in southwest Virginia and Virginia Tech.
endangered: a species which is in danger of extinction throughout all or most of its range.
extinct: no longer in existence.
habitat: the arrangement of food, water, shelter, and space necessary for a species' survival.
Animals, birds, fish, plants, or other living organisms threatened with extinction by anthropogenic (man-caused) or other natural changes in their environment.
Any species that is in danger of extinction throughout all or a significant portion of its range, as defined in the Endangered Species Act.
Fishery ...
Two events possibly linked in this way are the Permian-Triassic extinction event and the Paleocene-Eocene Thermal Maximum. However, warming at the end of the last ice age is thought not to be due to methane release [31].
Fish Kill: When aquatic life within a river, lake, or stream dies in a mass extinction.
ENDANGERED SPECIES ACT: The federal law that sets forth how the United States will protect and recover animal and plant species whose populations are in dangerous decline or close to extinction.
end-Pleistocene: The end-Pleistocene was a prehistoric time some 15,000 years ago at the end of the geologic time period called the Pleistocene, where a large extinction of many large animals took place.
But there is a limit, and the continuing chemical insult we're imparting to the land, air and water; the ongoing degradation and loss of habitat; the unprecedented rate of species extinctions-all these things spell trouble.
Unless measures are taken to alleviate environmental degradation, environmental debt continues to rise and the burden is transferred to future generations. Some environmental damage such as species extinction is not restorable, ...
The depth of this layer, which is about 80 m, is determined by the water's extinction coefficient, the cloudiness, and the sunlight's angle of incidence.
 See also: Extinct, Environment, Species, Environmental, Reduce
  
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