Preventing Extinction and World Change

Thirteen years ago, the wolf was reintroduced into the Yellowstone National Park. In two possible places (Snowflake Springs and Butte Lock), it was placed in a low risk bait lock Rock to promote wolves spread and create packaging. Prior to and during reintroduction, researchers at the Oregon State University measured the growth rate of the six-mile willow along the Gallatin River across Butte Rock and Snowflake Springs. During the research from 1998 to 2002, researchers found that Snow Springs, Elk and Wolf did not live, and the growth of the willow fell from 92% to zero ("How a wolf works Will you help Yanagi? ", 4).

Large-scale extinction in the late Permian age (225 million years ago): 90 to 96% of the species has been extinct. Many factors such as global volcanic activity increase, Pangea formation, sudden release of methane and carbon dioxide from the atmosphere leading to global warming and ocean acidification are causing extinction. Meteor collision may also occur. This is the biggest extinction in history. It is also known as "death." Triassic - Jurassic mass extinction (213.3 million years ago): 70-75% of species have been extinct. Scientists believe that the lack of ecological seed formation due to climate change, global warming, and Pangea integration is a possible cause of extinction. Meanwhile, dragons other than dinosaurs, large lobsters, large amphibians have become extinct, dinosaurs evolved, and eventually they dominated the earth.

Causes of mass extinction are competition, food resource reduction, atmospheric change, climate change, sea level change, plate tectonics. To become mass extinction, the whole world is extinct, many species are extinct, many species are extinct, and extinction must be summarized in a short period of time. Paleontologists were able to identify patterns between and within extinction cases. The process of extinction is as follows: 1) Attack of extinction in the inland and sea 2) Animals are repeatedly suffering, but plants are often highly resistant to mass extinction 3) During mass extinction Preferential disappearance of tropical biotic forms of animals repeats them repeatedly 5) Periodicity of the so-called equidistant or geological period (once in about 26 million years)

Since organisms can not adapt to changes in the environment, mass extinction is thought to occur. Therefore, mass extinction can be considered selective. Because the cause of mass extinction (external factor) affects certain biological properties (intrinsic factors) of organisms or biological groups, the possibility of mass extinction is reduced or more In some cases, it is characteristically selective. Event For example, if you have narrow leaves to prevent plants from overheating, it will be more likely to cause global warming. Classification taxonomies may be positively selected for taxonomic groups due to mass extinction. Because there are many taxonomic groups in the taxonomic group that disappear more than other taxonomic groups. Mass extinction is also geographically selective and acts on one or more regions of the world.