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zheng jiu na ji jiang xiao shi de bin wei wu zhong
Author(s): 
Pages: 22-25
Year: Issue:  5
Journal: Knowledge is Power

Abstract: 人类社会不断发展,人类占据的空间越来越大,活动范围越来越广,野生动物们的家园逐渐也被蚕食,它们的正常迁徙也被人类发达的交通干线所分割,生境逐渐破碎化,种群数量急剧减少. 自然界中生物物种的发生、发展、衰退和消失要经历一个漫长的过程,物种的形成与绝灭的速率基本达到一个平衡.可是人类向自然的索取越来越多,自然生态资源日益枯竭,不堪重负,也使野生生物的生存状况也饱受侵扰.
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