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　　A study has found that cutting down trees in rainforests appears to be accelerating the spread of black rats. Here's our Science correspondent Matt Mcgrath.

　　一份研究发现，砍掉热带雨林的树木似乎能加剧黑鼠的蔓延，科学记者马特·麦格拉斯报道。

　　"While black rats have spread rapidly throughout the world over the past 400 years, they have tended to avoid mature forests, disliking the leafy floors which are noisy for these rodents to run through. Now researchers have found that the clearing of rain forests in the developing world could be speeding the spread of these black creatures. In tests in B, scientists found that fallen trees contained more insects and provided better cover for these rats. The authors are concerned that this invasion will be bad news for other species including nesting birds and small mammals."

　　“尽管过去400年来黑鼠在世界各地迅速蔓延，但它们一直没有蔓延到森林中去，它们不喜欢在布满树叶地面上爬行时制造的声音。现在研究者发现，发展中国家清理雨林的做法加速了黑鼠的蔓延。科学家发现，倒下去的树木中有更多的昆虫，能为黑鼠提供更好的避身处。研究作者担心黑鼠的入侵对于筑巢鸟和小哺乳动物等物种来说是个不好的消息。”

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