Downstream from dams,fish and other wildlife may get just a trickle when the gates are closed and a flood when they're open.These changes reduce wildlife in the area.
麻烦将这一段翻译成中文，谢绝翻译机器，越流畅越好！
谢谢！！！
參考答案:水从水坝上流下来,当大坝关闭的时候,鱼儿和野生植物只能获取一丁点水,而当它打开的时候,却会迎来洪水般的水流.这些改变减少了这个区域的野生植物
