野牛群,黄石公园,美国怀俄明州,1996
| Photo of the Day | 2008-03-01 | | 下一张图片 |
中文注释:在大火横扫了超过三分之一之的美国怀俄明州的黄石国家公园里,野牛在繁衍生息.现在,经济学家认为野火是自然引起的,并且这对生态系统来说是有益的。通过焚烧死的或腐坏的物质让营养皈依土地,烧掉那些受病通折磨的植物和昆虫,清除那些厚厚的树冠层和林下植物,让新一代的仔苗生长。照片是应邀拍摄的,但后来没有刊登,1996年《国家地理杂志》的“火元素”号 作者: Raymond Gehman
野牛 黄石公园 美国 怀俄明州 图片故事:高清壁纸:英文注释:Bison Herd, Yellowstone National Park, Wyoming, 1996 Bison thrive in Wyoming's Yellowstone National Park years after fires swept through more than a third of the park. Ecologists now regard wildfires as natural and beneficial in forest ecosystems. They return nutrients to the soil by burning dead or decaying matter, burn off disease-ridden plants and insects, and clear thick canopies and undergrowth, allowing a new generation of seedlings to grow. (Photo shot on assignment for, but not published in, "Essential Element of Fire," September 1996, National Geographic magazine) 随机推荐: |
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