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题型:阅读理解-阅读单选 难度:0.65 引用次数:110 题号:18875470

Seagrass meadows (海草床) are wonder plants growing beneath the sea. They feed and shelter sea life and are masterful at storing carbon. Thanks to the assistance of tiger sharks, a huge seagrass meadow in the Bahamas Banks has been discovered, offering the world a tool to fight climate change.

Seagrass has usually been detected by Earth-orbiting satellites that identify darker spots in the blue water. In a recent study, tiger sharks were selected as research tools due to their highly consistent associations with seagrass ecosystems. They spent 70% of their time in seagrass meadows. The team equipped eight tiger sharks with satellite labels, seven sharks with camera labels, and used a 360-degree camera on a shark for the first time ever.

The data researchers collected was astonishing. The world’s largest seagrass ecosystem, measuring at least 66,900 square kilometers, has been discovered. This reflects a 41% increase from previous estimates of global seagrass. Seagrass can capture (捕获) huge quantities of carbon by photosynthesis (光合作用) and stores it on the seafloor. In terms of climate change, this is excellent news; seagrass is 35 times faster at removing carbon than tropical rainforests. When referring to global seagrass carbon stock estimates, the study indicates that seagrass in the Bahamas may contain 19.2% to 26.3% of all the carbon stored in seagrass meadows on Earth.

Yet seagrass meadows are rapidly disappearing, with over 92% of meadows in the UK gone, according to the World Wildlife Fund. Scientists are collecting seeds and trying to grow new seagrass meadows through restoration projects. This new discovery offers optimism and proves the importance of the ocean for healing.

The sharks led us to the seagrass ecosystem in the Bahamas, which we now know is likely the most significant blue carbon sink on the planet. What this discovery shows us is that ocean exploration and research are essential for a healthy future. The undeveloped potential of the ocean is limitless. These meadows can be protected and can be copied, offering hope for climate change around the globe.

1. How was the seagrass meadow in the Bahamas Banks discovered?
A.By analyzing satellites images.
B.By keeping track of tiger sharks.
C.By using a 360-degree camera.
D.By carrying out restoration projects.
2. What is the benefit of seagrass in terms of climate change?
A.Seagrass provides food for tiger sharks.
B.Seagrass stores large amounts of carbon.
C.Seagrass absorbs wastes from the ocean.
D.Seagrass supplies a habitat to sea animals.
3. What is the main message conveyed in the passage?
A.Tiger sharks are a tool to detect seagrass meadows.
B.Seagrass meadows are disappearing at an alarming rate.
C.Scientists are making progress in restoring seagrass meadows.
D.Seagrass meadows have a great potential to fight climate change.
4. What is the writer’s attitude towards the discovery of seagrass meadows?
A.Concerned.B.Positive.C.Doubtful.D.Indifferent.
【知识点】 环境保护 说明文

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