Scientists say record heat has cost reef half of corals
The Great Barrier Reef, one of the earth's most precious habitats, lost half of its coral populations in the last quarter-century, a decline that researchers in Australia said would continue unless drastic action is taken to reduce the effects of climate change.
Colony sizes were smaller, there were fewer “big mamas," or older large corals that produce baby corals; and there were fewer of those babies, which are vital to the reefs future ability to_________. "Our results show the ability of the Great Barrier Reef to recover — its resilience (恢复力) — is weakened_________ the past, because there are fewer babies, and fewer large breeding adults," Dr. Andy Dietzel, the lead author of the study, said in a statement.
_________ a process in which corals turn white as water temperatures rise — contributed to sleep losses of Barrier Reef in 2016 and 2017. The southern part of the reef was also_________ to record — setting temperatures in early 2020. Researchers cited climate change as one of the major_________ of disturbances to reef.
“There is no time to_________ they said in a statement. "We must sharply decrease greenhouse gas emissions as soon as possible.”
Researchers were disappointed about what they saw as a lack of attention to the study from government leaders in Australia, the world's biggest coral exporter. The government has _________ calls to reduce carbon emissions even as heat waves, drought and fires continue to reveal the country ,s situation of being hurt by climate change.
The Great Barrier Reef, which _________ a vast array of marine life, has between 300 and 400 coral species and stretches for thousands of kilometers across the Australian coast.
"You can_________ see it from space," said Deron Burkepile. a professor at the University of California, Santa Barbara.
Coral reefs worldwide are ____________ for billions of dollars is tourism and provide habitats for fish that feed close to one billion people on the planet, he said.
“The situation is serious," Professor Burkepile said. But people should not feel ____________ about the future of coral reefs, he said, even as they wait for world leaders to take more ____________ steps to control the effects of climate change.
At the local level, ____________ nitrogen (氮) pollution — which ____________ fading — can be controlled by reducing fertilizer and sewage runoff, according to a study that Professor Burkepile conducted with other researchers at his university. "The other thing that we need to take away is that coral reefs are amazing resilient," he said. "If we don't continually damage them, they will________________.
【小题1】A.live | B.manufacture | C.return | D.breed |
【小题2】A.in terms of | B.in relation to | C.in comparison with | D.with regard to |
【小题3】A.Fading | B.Failing | C.Collapsing | D.Poisoning |
【小题4】A.accustomed | B.subjected | C.elevated | D.adapted |
【小题5】A.drivers | B.resources | C.consequences | D.aspects |
【小题6】【小题7】A.raised | B.handled | C.received | D.resisted |
【小题8】A.supports | B.undergoes | C.survives | D.accommodates |
【小题9】A.literally | B.alternatively | C.automatically | D.particularly |
【小题10】A.responsible | B.profitable | C.available | D.sustainable |
【小题11】A.suspicious | B.hesitant | C.hopeless | D.careless |
【小题12】A.exclusive | B.aggressive | C.oppressive | D.excessive |
【小题13】A.for example | B.in fact | C.on the contrary | D.in turn |
【小题14】A.strengthens | B.weakens | C.worsens | D.exaggerates |
【小题15】A.inherit | B.recover | C.grow | D.prosper |