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ecosystem decay : ウィキペディア英語版
ecosystem decay
''Ecosystem Decay'' is a term coined by Thomas Lovejoy to define the process of which species become extinct locally based on habitat fragmentation. The process is ultimately what caused several species to go extinct, including the Irish Elk. The most dominant factor in this process is isolation and thus, inbreeding of animals which will lead to the local population's demise as small areas cannot support enough genes for inbreeding to not occur.
Ecosystem decay is caused by multiple factors, one of which is inbreeding. Another factor is the absence of rivals and neighbors from which they might learn. The resident populations will have had to adjust their diet and other fundamental factors in order to survive.
This principle is very similar to Forest fragmentation except for the fact that ecosystem decay is what results in the event of forest fragmentation. This may also follow the principles of Island Biogeography somewhat.
==Overview==

Ecosystem decay is a natural phenomenon that has several resulting features.〔(【引用サイトリンク】url="Decay of Interspecific Avian Flock Networks along a Disturbance Gradient in Amazonia." Decay of Interspecific Avian Flock Networks along a Disturbance Gradient in Amazonia. N.p., n.d. Web. 12 Nov. 2015. )
* Decline of native populations of animals
* Decrease in genetic diversity
* Decrease of the interior:edge ratio
* Isolation of an area of viable habitat
* Reduction in viable habitats and often extreme separation

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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