Not even the sea is safe from the glare （強光） of humans' light at night.Researchers published the first global map of ocean light pollution.It shows large parts of the sea are lit up at night.And that risks confusing or disrupting the behaviors of sea life.
Tim Smyth led a team to research where in the water this light is strongest.Smyth and his colleagues started with a world map of man-made night-sky brightness that had been created in 2016.Then they added data on the ocean and atmosphere.Some data came from shipboard measurements of man-made light in the water.Others came from satellite images that judge how clear the water is.Particles（微粒）in the water，such as tiny floating plants and animals，can affect how far downward light travels.These factors vary from place to place and may change with the seasons.The team also used computers to copy how different wavelengths of light move through water.
Next，they wanted to know how that underwater light might affect animals.Not all species will be easily affected.The team focused on copepods （橈足亞綱甲殼動物）.These common creatures are a key part of many ocean food webs.They use light as a signal to move all together to the dark deep，seeking safety from other surface creatures.Normally they use the sun or the winter moon as their signal.Too much man-made light can mess up their usual patterns.
Light pollution is strongest in about three feet of the water.Here，man-made light can be strong enough to confuse the copepods.Nearly 2 million square kilometers of ocean get such strong night light.That's an area about the size of Mexico.Farther down，the light gets weaker.But even 65 feet deep，it's still bright enough to bother copepods across 840，000 square kilometers of ocean.
The team described its findings December 13 in Elementa：Science of the Anthropocene.
（1）What do we know about copepods from the passage？ CC
A．They are main eaters of other creatures.
B．They are not affected by underwater light.
C．They can escape attacks with the help of light.
D．They can weaken the effect of man-made light.
（2）How does the author show the seriousness of light pollution in Paragraph 4？ BB
A．By stating opinions.
B．By listing numbers.
C．By raising questions.
D．By giving reasons.
（3）Which of the following can is a suitable title for the text？ DD
A．Light Pollution from Sea Life
B．Living Conditions of Copepods
C．Discoveries of Copepods
D．Light Pollution Even in Sea
【考點】自然科學(xué)研究成果；說明文．
【答案】C；B；D
【解答】
【點評】
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發(fā)布：2024/4/20 14:35:0組卷：2引用：1難度：0.5
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