英语听力：探索发现 2013-03-06 猛玛象进城记 Mammoths to Manhattan—16

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The heavy use of east coast beaches by people has threatened skimmer numbers. It’s ironic² that this man-made car park made out of crushed oyster³ shell should become a substitute.

 

Skimmers raise their chicks on a fish diet. But they serve their portions whole which can cause problems for their young. 

 

The increasingly human landscape of North America can make wildlife spectacles a rare event. But there are situations when it brings nature closer to people. That’s exactly what has happened here in this power plant in Florida. These are West Indian manatees⁴, residents of the Florida coast. People and manatees don’t usually get along. Increasing boat traffic has become a big threat to manatees and some bear the scars of painful encounters with boat propellers⁵.

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