(带文稿) 0201：气候变暖，科学家给物种们换了个窝【文末小测】

This photo shows workers relocating a Tristram’s storm petrel in Hawaii on March 29, 2022. (L. Young/Pacific Rim Conservation via AP)

Transcript

Scientists increasingly are aiming to move animals threatened by rising temperatures to new areas where they never lived before in an effort to save them.

One example is a project in Hawaii that moved, or relocated, a seabird species from one island to another about 800 kilometers away.

Traditionally, scientists have considered the idea of species relocations risky. This is because it can cause problems for existing native animals.

But some scientists now believe such relocations are necessary to save threatened species. Moves have already been considered for several species, including birds, lizards, butterflies and even plants.

The relocation in Hawaii involved the Tristram’s storm petrel, a seabird that is native to low-lying islands in Hawaii and Japan.

The project moved about 40 young birds from Hawaii’s Tern Island to Oahu, one of the state’s biggest islands. The Tristram’s storm petrel is considered at risk of disappearing completely.

Tern Island is currently just 1.8 meters above sea level. Scientists fear the island may disappear completely if the sea level there continues to rise.

This April 2018 photo shows a Tristram’s storm petrel chick in Papahanaumokuakea Marine National Monument, Hawaii. (Amanda Boyd/USFWS)

“Tern Island is washing away,” said biologist Eric VanderWerf of the nonprofit group Pacific Rim Conservation. “Climate change is causing a greater need for this — for taking a species outside its known historical range.”

Scientists hope the relocated animals can someday be returned to their native environments if conditions change.

A proposal by the administration of U.S. President Joe Biden would change the U.S. Endangered Species Act. The law aims to protect rare animals and plants. The change would make it easier to move some of the most threatened species to places where they have not been known to exist before.

As a reaction to that proposal, state wildlife officials and scientists have suggested moving populations of some species. These include the Key deer of southern Florida and the Karner blue butterfly from the Midwest and Northeast. In addition, officials are suggesting moving desert flowering plants in Nevada and California and the St. Croix ground lizard in the Virgin Islands.

Republican lawmakers in western states – including Montana, New Mexico and Arizona – are against the proposal. They say moving species to new places could create environmental problems and result in an “invasive species.”

Federal officials are expected to finalize the proposal in June. Jason McLachlan is a biologist at the University of Notre Dame in the state of Indiana. He told The Associated Press he thinks the government proposal demonstrates an important change “in the way we think of species protection and conservation.”

This July 13, 2012 image shows a Guam Kingfisher in Front Royal, Va. (Smithsonian’s National Zoo and Conservation Biology Institute via AP)

McLachlan said the issue goes beyond endangered species. He thinks it also raises questions about what should be considered “native” now that changing temperatures are pushing some species to seek out higher areas or move toward the planet's North or South.

He said comparable temperature changes in the past happened over thousands of years. But the current one is taking place over a shorter period and this has harmed ecosystems. “Eventually we're going to have to start thinking about it in ways that will make people…uncomfortable,” McLachlan said. “To say this species is OK and this species is not OK, that's asking a lot of human beings.”

Pacific Rim Conservation’s VanderWerf told the AP that to save storm petrels, scientists need to act before populations have crashed. “In 30 years, these birds will certainly be rare, if we don’t do something about it,” he said.

James Watson is a scientist at the University of Queensland in Australia. He said, “Many, many species” must be moved or they could go out of existence. Watson added that increasing wildfires have forced some relocations of animals.

“This kind of intensive management is necessary for us to have a reasonable shot at holding ... some species,” said Don Lyons, with the National Audubon Society’s Seabird Institute.

I’m Bryan Lynn.

QUIZ【答案见下方词汇表后】

Why did scientists say the process of relocating species is considered risky?

A. It can limit the available food and water supply.

B. It can cause problems for existing native animals.

C. It can result in the deaths of many relocated animals.

D. It can cause all of the above issues to happen.

In what area does the story say Tristram’s storm petrel seabirds can be found?

A. Alaska

B. Guam

C. Japan

D. Tahiti

What does the story say the proposed change to the U.S. Endangered Species Act would do?

A. Make the rules more difficult to move some seabird species

B. Make the relocation of certain endangered species illegal

C. Add new listings of threatened species in Hawaii and Japan

D. Make it easier to move threatened species to new areas

What did James Watson say is one thing that has forced some relocations of animals?

A. Disease spread

B. Lack of rain

C. Increasing wildfires

D. Deforestation

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Words in This Story

species – n. a group of animals or plants that are similar and can produce young animals or plants

range – n. a group of different things of the same general type

invasive – adj. moving into all areas of something and difficult to stop

conservation – n. an organized effort that aims to protect animals, plants and natural resources

ecosystem – n. everything that exists in a particular environment

uncomfortable – adj. not feeling comfortable and pleasant

management – n. the control and organization of something

【BCDC】