国家地理-2008-10-25 温室效应帮上忙?(在线收听) |
Transcript (by myconsent) --for reference only
Climate change is normally bad news for endangered species, but in the case of The Grey Nurse Shark is one of Suddenly you’re gonna get an influx of new genes coming into the population which means that they perhaps won't be as susceptible to disease outbreaks, etc. In addition to that, of course the population, as a whole, grows. But experts remain concerned about other environmental threats to the sharks, like commercial and recreational fisheries, ecotourism, overfishing for their fins, the aquarium trade and beach meshing. “On the long term, climate change may be lending a helping hand to the survival of Grey Nurse Sharks, but we can’t have made sure if they get there first, and that means solving the near term management problems. And the greatest near term threat is the capture of them--the sharks on hooks.” Grey Nurse Sharks became one of the first protected sharks in the world when
influx:涌入 susceptible [sə'septəbl]:容易受到感染的 |
原文地址:http://www.tingroom.com/lesson/gjdl2008/63508.html |