观看免费视频 Yellowstone National Park: Wolf Cascade

(7.38 MB) 添加日期13 May 2016 播放206次 动物 野生动物 Nature
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Yellowstone National Park: Wolf Cascade

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动画说明：

Wolves are are inextricably linked to many other animal and plant species. The trophic cascade of effects caused by their reintroduction is being studied.