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Câu hỏi:

20/07/2024 365

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42.

Scientists have uncovered a new threat to the world's endangered coral reefs. They have found that most are incapable of growing quickly enough to compensate for rising sea levels triggered by global warming. The study suggests that reefs - which are already suffering serious degradation because the world's seas are warming and becoming more acidic - could also become overwhelmed by rising oceans.

The research - led by scientists at Exeter University and published in Nature this week -involved studying growth rates for more than 200 tropical western Atlantic and Indian Ocean reefs. It was found only 9% of these reefs had the ability to keep up with even the most optimistic rates of sea-level rises forecast by the Intergovernmental Panel on Climate Change. "For many reefs across the Caribbean and Indian Ocean regions, where the study focused, rates of growth are slowing due to coral reef degradation," said Professor Chris Perry, of Exeter University. “Meanwhile, rates of sea-level rise are increasing - and our results suggest reefs will be unable to keep up. As a result, water depths above most reefs will increase rapidly through this century.”

Sea levels rose by several inches over the past century and measurements indicate the speed of this increase is now rising significantly. Two key factors are involved: climate change is making ocean water warmer and so it expands. And as ice sheets and glaciers melt, they increase amounts of water in the oceans.

At the same time, reefs are being weakened by ocean warming and also by ocean acidification, triggered as the seas absorb more and more carbon dioxide. These effects lead to bleaching events that kill off vast stretches of coral and limits their ability to grow.

“Our predictions, even under the best case scenarios, suggest that by 2100, the inundation of reefs will expose coastal communities to significant threats of shoreline change,” said co-author Prof Peter Mumby of Queensland University. This point was backed by US marine scientist Ilsa Ruffner writing in a separate comment piece for Nature. “The implications of the study are dire. Many island nations and territories are set to quickly lose crucial natural resources.”

What did scientists at Exeter University find in their research?

A. Tropical coral reefs are increasing more quickly than others in Pacific Ocean.

B. The majority of tropical coral reefs cannot keep pace with the increasing rate of sea levels.

Đáp án chính xác

C. Many coral reefs are developing in spite of their degradation.

D. The rapid rise in sea levels does not affect the density of coral reefs.

 Xem lời giải

Trả lời:

verified Giải bởi Vietjack

Đáp án B

Các nhà khoa học tại Đại học Ehreter đã tìm thấy điều gì trong nghiên cứu của họ?

A. Các rạn san hô nhiệt đới đang tăng lên nhanh hơn các rạn san hô ở Thái Bình Dương.

B. Đa số các rạn san hô nhiệt đới không thể bắt kịp tốc độ tăng lên của mực nước biển.

C. Nhiều rạn san hô vẫn đang phát triển mặc dù sự thoái hoá của chúng.

D. Sự tăng nhanh của mực nước biển không ảnh hưởng đến mật độ các rạn san hô.

Căn cứ vào thông tin đoạn 2:

The research - led by scientists at Exeter University and published in Nature this week - involved studying growth rates for more than 200 tropical western Atlantic and Indian Ocean reefs. It was found only 9% of these reefs had the ability to keep up with even the most optimistic rates of sea-level rises forecast by the Intergovernmental Panel on Climate Change. "For many reefs across the Caribbean and Indian Ocean regions, where the study focused, rates of growth are slowing due to coral reef degradation,” said Professor Chris Perry, of Exeter University. "Meanwhile, rates of sea-level rise are increasing - and our results suggest reefs will be unable to keep up. As a result, water depths above most reefs will increase rapidly through this century."

(Nghiên cứu - được dẫn dắt bởi các nhà khoa học tại Trường Đại học Exeter và được công bố trên tờ Nature tuần này - liên quan đến tốc độ tăng trưởng của hơn 200 rạn san hô vùng nhiệt đới Tây Đại Tây Dương và Ấn Độ Dương. Chỉ có 9% trong số các rạn san hô này có khả năng theo kịp ngay cả những mức độ lạc quan nhất của mực nước biển dâng do dự báo của Ủy ban liên chính phủ về biến đối khí hậu. “Đối với nhiều rạn san hô trên vùng Caribe" và Ấn Độ Dương, nơi nghiên cứu tập trung, tốc độ tăng trưởng chậm lại do suy thoái rạn san hô”, Giáo sư Chris Perry, thuộc Trường Đại học Exeter cho biết. “Trong khi đó, tỷ lệ mực nước biển dâng đang gia tăng - và kết quả của chúng tôi cho thấy rạn san hô sẽ không thể theo kịp. Kết quả là, độ sâu của nước trên hầu hết các rạn san hô sẽ tăng nhanh qua thế kỷ này.)

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