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题型:阅读理解-阅读单选 难度:0.65 引用次数:183 题号:13142249

When people think of threats facing the ocean, we often think of climate change, plastics, and overfishing. But research shows noise pollution is another essential thing we need to be monitoring. Scientists say the changes in the sounds of our oceans, seas, and other waterways affect many marine animals—from very small shrimps to huge whales.

Francis Juanes, an ecologist, explained, “For fish, sound is probably a better way to sense their environment than light.” Sounds help fish and other marine animals survive. They use sounds to communicate with each other. Sounds also help some ocean animals find food and avoid their hunters. Many ocean animals use sounds to find good places to mate (交配).

However, increased noise from humans is making it harder for these animals to hear each other. The noise is coming from shipping traffic, motorized fishing ships, underwater oil and gas exploration, offshore construction, and other noisy human activity. “For many marine species, their attempts to communicate are being masked by sounds that humans have introduced,” said Carlos Duarte, who co-wrote the paper with Juanes.

Experts at NOAA (the U.S. National Oceanic and Atmospheric Administration) explain the term masking on its website. Masking happens when one or more noises in the water block sound important to a marine animal's existence. NOAA experts state that masking is most noticeable when “a noise is at the same frequency and loudness as biologically important sounds, such as mating calls.”

The stress from human noise might also affect the immune system—an animal's natural defense system—as well as reproductive (生殖的)health or behavior. “Imagine having to raise your kids in a place that's noisy all the time,” said Joe Roman. He is a marine ecologist at the University of Vermont and was not involved in the research. Roman added that it should come as no surprise that many marine animals are showing higher levels of stress due to noise.

1. Why is it essential to monitor noise pollution in the ocean?
A.Noise pollution threatens the survival of marine animals.
B.Marine animals are less sensitive to light and plastic.
C.Marine pollution keeps changing the sounds of the ocean.
D.Noise pollution results directly from climate change.
2. What do the experts mean by using the term “masking”?
A.Being unable to detect mate calls leads to decline of marine animals.
B.The noise only occurs when it is of the same frequency of animals' sounds.
C.The mixed noise prevents animals from detecting important sounds.
D.Human activities are involved in producing noise in the ocean.
3. What does Joe Roman suggest in the last paragraph?
A.The immune system of marine animals is the same as kids'.
B.Raising kids in a noisy environment leads to more pressure.
C.Noise pollution is easier to deal with than other ocean threats.
D.Marine animals suffer from stress in a noisy environment.
4. What is the suitable title for the passage?
A.The Sharp Decline of Marine Animals
B.Humans Are Making Oceans Too Noisy
C.Time to Clean Up the Polluted Ocean
D.Importance of Sounds for Ocean Animals
【知识点】 动物 环境保护 说明文

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【推荐1】Thousands of birds die each spring and fall when they crash with Chicago’s high-rise buildings, which lie on a major migration path between Canada and Latin America. But the birds don’t die in vain. Since the 1970s, many of them have been collected from the street by the city’s Field Museum. They were classified and recorded in detail there. This unique and detailed set of data has been a scientific windfall, showing that North American migratory birds appear to become smaller in size.

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Relative brain size is often considered an indicator of behavioral flexibility in birds, according to the research. “The idea is causing a lot of disagreements when it’s applied to some other animals”, Baldwin said, “but it works for birds.” “Relative brain size connects with increased learning ability, increased memory, longer lifespans and others.” Baldwin said. “In this case, a bigger-brained species of bird might be able to reduce its risk to warming temperatures by searching for habitats with cooler temperatures, for example.” he said.

Birds that had big brains, relative to their bodies, had body-size reductions that were only about one-third of those observed for birds with smaller brains, the study found.

1. Why do some birds die on the way of migration?
A.The spring and fall change quickly.B.The weather becomes extremely cold.
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3. Which of the following can replace the underlined word “shrinking” in paragraph 2?
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4. How will bigger-brained birds protect themselves from the warming temperatures?
A.By finding cooler homes.B.By having longer lifespans.
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【推荐2】North Atlantic right whales now grow smaller than they did 40 years ago, and new research suggests a leading cause is the damage that human activity has done to the critically endangered species.

The findings, published in the journal Current Biology, reveal that when fully grown, a North Atlantic right whale born today would be expected to be about one meter shorter than a whale born in 1980. Currently, full-grown members of the species average 13 to 14 meters in length.

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North Atlantic right whales typically move up and down the Eastern seaboard, from Florida to Canada. In recent years, more than half the population can be found from late winter to early spring off the coast of Cape Cod, where they sail through a deadly maze (迷宫) of rope and fishing equipment.

Entanglements in the equipment can lead to life-threatening infections, starvation, or drowning (溺水). Even when they don’t kill the whales, they can cause long-term harm, the researchers found. When the whales get caught in fishing equipment and end up dragging it around, it forces them to expend more energy fighting to survive, instead of growing or reproducing. Not only does entanglement contribute to reduced body size for an individual whale, but female North Atlantic right whales entangled while nursing produce smaller babies. That threatens the repopulation of a species with so few remaining members.

In response, conservationists say managers of fishing grounds need to better manage the fishing grounds, whose equipment on the seafloor is considered the primary cause of entanglements. One potential answer is greater investment in the development and testing of ropeless fishing technology.

“There is no time to wait,” researchers said. “The species can’t tolerate any further impacts, or it will have no future.”

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A.Making ocean fishing completely unlawful.
B.Banning the use of fishing equipment.
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D.Investing more in rope-free fishing technology.
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【推荐3】Madagascar, an island nation off the southeastern coast of Africa, is home to some of the most unusual animals in the world. But many of these species may be in danger. Bushes and low­lying plants have started to take up too much space on the forest floor, providing fuel for wildfires. So scientists are considering using giant tortoises to help prevent the forest fires and thereby help the native wildlife in Madagascar.

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