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1 国内外河道断流引起的生态环境问题美国的科罗拉多河自30年代以来入海水量大幅度减少,以致全部拦载用完,使得河口沼泽和湿地干涸,人海营养物减少而导致生物种群减少,近海渔业产量急剧下降;不仅当地绿海龟、粗壮骨尾鱼等生存受到威胁,甚至世界上最小的海洋哺乳动物蔗根象甲也仅剩下几百头,更造成昔日主要的商业鱼种之一尤鱼濒
1 Eco-environmental Problems Caused by River Closure at Home and Abroad The Colorado River in the United States has reduced the amount of water entering the sea dramatically since the 1930s, resulting in the exhaustion of estuarine swamps and wetlands and the reduction of nutrient populations in the estuary, The production of offshore fisheries has dropped sharply. Not only the local green turtles and the thick-skinned sea turtles have been threatened. Even the smallest marine mammals in the world have only a few hundred heads, only one of the major commercial species in the past You are on the verge of fish