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四川省天府名校2021届高三上学期英语大联考(12月诊断性考试)试卷(含听力音频)
A team of biologists recently studied rain-frogs in the forests of northern Ecuador. While doing so, they discovered a Mindo harlequin toad (五彩蟾蜍). The creature hadn't been seen alive in 30 years. The scientists couldn't believe their eyes."The three of us spotted it," Melissa Costales, a conservation biologist, said. Her partners were scientist Cesar Barrio-Amoros and guide Eric Oster-man." It took our brains a while longer than normal to recognize that we were watching an Atelopus mindoensis !"Their findings were published in the spring, in the journal Herpetology Notes.
Until recently, 13 of the 25 species of harlequin toads in Ecuador had gone unseen since the 1980s or early 1990s. Climate crisis is damaging their living conditions, and they can't find food that is suitable for them. Besides, people hunt for them to make money. However, scientists hold that most of them had been wiped out by a terrible disease called chytrid, which is especially harmful to the harlequin toad.
The Mindo harlequin is the latest harlequin toad species "to come back from the dead," says Costales. Since 2003, eight other species have been found, three of them in Ecuador. Costales says the Mindo harlequin may have developed a resistance to the disease. That would explain the toad's reappearance. And it could spell good news for other harlequins. Since discovering the first one, Cos-tales's team has found five more. They were all tested for chytrid. None had the disease. But that doesn't mean the survival of the species is guaranteed, Costales says. The harlequin toad is still endangered.
Costales is developing a conservation plan with a zoology museum in Ecuador. She wants to make sure the Mindo harlequin toad doesn't fall back into dying out." Each rediscovery gives us a second chance to develop better conservation strategies (策略),"she says." Not every day do we have the opportunity to rediscover a species that we believed to be extinct.
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