水,瞬息万变,它以液态、固态和汽态占领着地球上的海洋、冰川、湖泊、河流、土壤和大气空间。地球上共有十五亿立方公里的水,其中淡水只占3%。水,是生命的摇篮,无论微生物、植物和动物都离不开水。那么水对森林有哪些影响又是怎样循环的呢?降水量与森林分布的关系上个世纪末,有的科学家研究了北美大陆的森林后指出,那里的森林是从太平洋和 Water is rapidly changing, occupying the Earth’s oceans, glaciers, lakes, rivers, soils and atmospheric spaces in liquid, solid and vapor states. There are 1.5 billion cubic kilometers of water on Earth, of which fresh water accounts for only 3%. Water is the cradle of life, regardless of microorganisms, plants and animals are inseparable from the water. Then what is the effect of water on the forest and how it circulates? The relationship between precipitation and forest distribution At the end of the last century, some scientists studied the forests of the North American continent and pointed out that the forests there are from the Pacific Ocean and