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"液体"森林
 从巴西里奥内格罗出来的水路.
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写 Rhett Butler. 翻译 Che Fei
07/12/2007
第六章:
雨林水域
由于热带雨林降水丰富，雨水被集水区吸收，使得这里拥有一些世界上最大的河流,象亚马逊河、马德拉河、湄公河、内格罗河、奥里诺科河和扎伊尔河(刚果)等.这些大河由许多小的支流、小溪和小湾汇集而成.例如，单亚马逊河就有约1，100条支流，其中有17条有1,000多英里长.尽管无论从外表还是水组成上，大的热带河流可以说是基本一样的, 但它们的支流差别很大.在不同的年份，许多热带河流要么水位很低，要么水位很高.
除了河流以外,雨林也有一些很平常的、"自立"的湖及所谓的牛轭湖，它是河流改变流经路线而形成的.这些湖成了适应安静、停滞环境的物种的家乡.
不管热带水域是一些大的河流还是牛轭湖，生活在它们当中的动物种类和围绕这些水域的雨林差不多一样多。但它们也日益受到人类活动的严重影响，包括污染、森林采伐带来的淤积、水电站项目的建设以及对常驻物种的过度捕杀等.
复习题:
[打印版]
续: 雨林中的河流
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