1 . [1] What do North Carolina’s red wolves, the Eurasian beaver and Przewalski’s horse have in common?
[2] All of them went extinct in the wild — and all of them came back, thanks to reintroduction programs.
[3] Conservation scientists use translocation and captive breeding (圈养繁殖) to re-establish animal populations that have died out in the wild — either entirely or in certain areas. Reintroducing extinct-in-the-wild animals to their native territories can be a double win: helping to restore damaged ecosystems, as well as increasing population numbers.
[4] But setting a species loose in the wild is a risky balancing act. Reintroductions often take years and involve multiple stages. Before bringing back a species, conservationists have to evaluate the threat level — both to and from the animal — and the role it played in the ecosystem. In places where wild populations have died out more recently, there’s a better chance of success. The less time that has passed, the more likely that environment is the same as when the species went extinct. But scientists still need to address the reason why it went extinct in that environment to begin with.
[5] Reintroduced animals can have a positive impact on the landscape, but how fast this happens depends on the type of animal and how damaged the environment is. Herbivores (食草动物) can make a significant change relatively quickly, while predators tend to be reintroduced slowly and carefully. Although they can be useful for managing pest species, conservationists have to ensure they don’t overhunt or threaten other vulnerable animals.
[6] A 2020 study highlighted species reintroduction as one of the most effective ways to save endangered animals. The study estimates that conservation action between 1993 and 2020 saved up to 48 species of birds and mammals from extinction, and that the rate of extinction would have been three to four times higher, during that period, without those efforts.
1. What are the reintroduction programs aimed at?A.Bringing back a species. | B.Enlarging a species’ native habitats. |
C.Increasing a species’ number. | D.Developing new breeding methods. |
A.The collapse of ecosystem. | B.Evaluating the threat level. |
C.The extinction of a wild population. | D.Setting a species loose in the wild. |
A.The size of animals. | B.The bio-diversity of animals. |
C.The feature of landscapes. | D.The extent of environmental damage. |
A.To call on active measures to save species. | B.To highlight the necessity of bio-diversity. |
C.To introduce an effective conservation action. | D.To stress the importance of a balanced ecosystem. |
2 . When glaciers melt, they leave behind infertile (贫瘠的) landscapes. But a new study found that within just three years, such exposed land was restored by llamas (美洲驼), whose activity enriched the soil and promoted plant growth. By the foot of Peru’s melting Uruashraju glacier, researchers partnered with local farmers to farm llamas on four specific plots. For three days a month from 2019 to 2022, the llamas grazed (吃青草) the plots, fertilizing them with waste and spreading seeds from droppings.
As is the case worldwide, glaciers are disappearing in Peru’s Cordillera Blanca mountains at an alarming rate. And as the ice melts, nearby ecosystems wither: They lose access to summertime supplies of freshwater and sometimes encounter harmful acidic minerals in rocks once covered by the glaciers.
Llamas may help count er some of these effects. Their transformation of the land, as seen in the new study, could reduce rock weathering and help the soil hold onto more dampness, thus limiting the acidic runoff that can poison farmers’ crops. Such pollution is one reason why local farmers partnered with the researchers. The animals’ behavior could one day even generate new grasslands as soil quality improves.
The idea that animal grazing may positively impact a landscape is not new. Nor is rewilding, the push to bring key species back to their native ecosystems, unique to the Cordillera Blanca mountains. In Finland, for example, the Indigenous Sami are working to reintroduce reindeer in deforested land, potentially restoring it. But the size and speed of the changes the llamas helped bring about surprised the researchers. From 2021 to 2022, the average amount of plant cover in the llama plots grew from about 9 percent to nearly 14 percent—faster than it did in four control plots. The research underscores the valuable roles animals play in shaping landscapes, says ecologist Kelsey Reider of James Madison University in Harrisonburg, Va., “The animals themselves are doing a lot.”
1. What did the new study find?A.Llamas could help improve ecology. | B.Llamas needed to be exposed to soil. |
C.Llamas might survive poor situation. | D.Llamas were able to stop ice melting. |
A.Expand. | B.Arise. | C.Integrate. | D.Worsen. |
A.Because they longed to be more learned. |
B.Because they profited from the research. |
C.Because they wanted to keep llamas away. |
D.Because they failed to know llamas’ behavior. |
A.Llamas restore the forest in Finland. | B.Wildlife helps a lot in restoring nature. |
C.The idea of rewilding isn’t common. | D.The research should collect more data. |
3 . The 97-year-old botanist, Margaret Bradshaw, is the chief caretaker of Teesdale’s rarest flowers. “Everything about Teesdale is unique,” says Bradshaw with pride — and the authority of someone who has just written a 288-page book on the subject. Bradshaw has been recording rare plants here since the early 1950s and has witnessed great decreases.Her data was the first to prove that — and the need to do something about it.
The main reason for the decrease of these plants is an unusual one. The number of sheep in Teesdale had been reduced by half by 2000, as the uplands were generally believed there were too many sheep. Bradshaw says while sheep are hunted in some upland areas, reducing herding in Teesdale has been destructive. Longer grass overshadows the delicate (娇嫩) flowers, taking away the light they need to grow. As a result of her findings and her work with farmers who herd the land — as well as Natural England, which manages it — sheep numbers are increasing and the timing of herding is being carefully managed. This has led to the partial recovery of some plants.
At 93, she set up Teesdale Special Flora Research and Conservation Trust to record rare plants. A keen horse rider, at 95, she did a 55-mile horse journey across Teesdale, raising almost $ 10,000 for the Trust. When asked about the secret to longevity, “Just keep going,” she says.
“Keep at it.Don’t sit down and just watch TV.”
“I recognise I’m getting older and I’ve been trying to get more people to take over and do the records. They don’t believe I won’t be here forever,” Bradshaw says. Despite Bradshaw’s guardianship of this land, and the love and energy she has put into saving it, the future here is unknown. The last words of her book speak to this endless loss. “This is our heritage, this unique plant species, mine and yours,” she writes. “In spite of trying, I have failed to prevent its decrease, now it is up to you.”
1. What is Margaret Bradshaw’s main work with the rare plants?A.Writing a book. | B.Preventing their decrease. |
C.Collecting their data. | D.Directing farmers to grow plants. |
A.Not enough sheep. | B.Lack of fund. |
C.Poor management. | D.Too many sheep. |
A.Unity brings strength. | B.Many hands make light work. |
C.Youthful at heart, regardless of age. | D.Advance what the forerunners began. |
A.Teesdale:Home to Rare Plants | B.Battling for Teesdale’s Wildflowers |
C.Bradshaw:A97-Year-Old Gardener | D.Exploring Teesdale’s Unique Plants |
4 . Earth Day falls on April 22 each year to inform people about environmental problems and inspire them to act. It first came into being in 1970, followed in 1972 by World Environment Day. It has been celebrated ever since, slowly but surely picking up steam. Interestingly, it remained a grassroots affair for 20 years before spreading out to 140 countries in 1990. Now, it is celebrated around the world. Humans still face many challenges, such as climate change and plastic pollution. But we can all make a difference.
When Claire was in the seventh grade, she learned about plans to expand and modernize her middle school. As a follower of Earth Day, she wanted to help. Claire asked the school board to add solar panels to the project because, she explained, clean energy would contribute to a truly modern school, and help her school pursue sustainable development.
The board liked the idea but said it could contribute just $25,000, one-fifth of the cost. So Clarie turned to the community, looking for a solution. Her friends and neighbors shared her enthusiasm. Soon Claire organized a group of kids and adults, who set to work raising the rest. They wrote grant (拨款) requests, put on a talent show and asked for donations, even going door-to-door for them at Halloween. And they appealed to charitable foundations too. One donated more than half the cost!
After two years of hard work, the group paid for the solar panels, which now supply one-fourth of the school’s electricity needs, saving the district thousands of dollars. “My favorite part about this project was that one person could start something small and then the project could grow and have a big impact on the community,” Claire said “There are always going to be barriers and hard parts. When there’s a challenge presented to you, use it as a learning moment and an opportunity to overcome it.”
You can be a hero for the environment, so find out what can be recycled where you live.
1. What can we learn about Earth Day from the first paragraph?A.It was first celebrated on April 22, 1972. | B.It gained instant popularity worldwide. |
C.It aims to raise environmental awareness. | D.It promotes solutions to human challenges. |
A.To sell the solar panels. | B.To make her school greener. |
C.To improve academic grades. | D.To beautify the school campus. |
A.The vital role of charities. | B.Difficulties in raising money. |
C.Constant efforts on the project. | D.Financial support from the public. |
A.Responsible and determined. | B.Generous and creative. |
C.Energetic and reliable. | D.Curious and adventurous. |
A.Go for a swim. | B.Do some sunbathing. | C.Collect the rubbish. |
Scientists have rediscovered a species of frog last seen more than 80 years ago. They relocated the small Hall’s water frog named after the American researcher Frank Gregory Hall
The journal Zootaxa
7 . There are several reasons to use canvas (帆布) grocery bags or reusable grocery bags made from other materials. Some environmental organizations have been pushing for the use of such bags.
From an environmental aspect, canvas grocery bags are better choices than paper or plastic bags.
Plastic grocery bags have a number of environmental disadvantages. When plastic grocery bags end up in the natural environment, they can cause a wide range of problems. Animals may choke on or be caught in such bags.
As anyone who has had a bag broken open in the parking lot knows, it can be very upsetting to lose a lot of groceries to a poorly-constructed grocery bag.
A.Many grocery stores carry canvas grocery bags. |
B.Canvas grocery bags have uses beyond the grocery store. |
C.Instead, you only have to buy a canvas grocery bag once. |
D.What’s worse, plastic can stay in the ocean for thousands of years. . |
E.They point out reusable bags can be a small change with a big difference. |
F.Canvas is more environmentally friendly to produce than paper or plastic. |
G.However, canvas grocery bags can hold much more weight than regular ones. |
8 . In the west of the Greek capital Athens, the fish market of Keratsini is busy early in the morning, with trucks waiting nearby to be loaded with fishes. But on his fishing boat, Arapakis sorts out something different—bottles, boots, plastic pipes and fishing nets, all dragged from the bed of the Aegean Sea.
“We are swimming in plastic,” said Arapakis, whose family has fished for five generations. “By 2050, there will be more plastic than fish in the sea,” he said, as recent reports noted.
That morning’s plastic catch weighed “about 100 kilograms,” said the founder of Enaleia, a nonprofit that encourages fishermen to collect marine (海洋的) waste caught in their nets. Since its establishment in 2018, it has worked with more than 1,200 fishermen in Greece to raise concern over the degradation of the marine environment.
Active in 42 ports throughout Greece, Enaleia provides fishermen with large bags for marine waste that they can put in garbage cans once back at port. For every kilogram of plastic they deliver, they receive a small amount of money, which is enough for a drink. Since October, fishing crews have dragged out 20 metric tons of plastic and old fishing equipment each month. Nearly 600 tons have been collected over the last five years. The collected plastic is transported to a recycling plant in the industrial area of Megara near Keratsini, to make new products such as socks, swimwear or furniture.
Arapakis said he went about the cleanup project after a trip to Greece’s Cyclades islands, where he saw fishermen throwing the waste gathered by their nets back into the sea.
Arapakis is convinced there has been a “mentality change” among Greece’s fishermen. “Previously we caught large quantities of plastic, but we only kept the fish. All waste was thrown into the sea,” said Mokharam, team leader on the Arapakis family’s boat. “The project brings practical benefits for fishing boats. In the past, the anchor was often caught by waste, especially nets, and the engine would go out. But now things have changed,” he added.
1. What can we learn about Arapakis from the first 2 paragraphs?A.He was a successful fish trader. | B.He collected waste from the sea. |
C.He liked swimming in the sea. | D.He had a large family to support. |
A.Impact. | B.Worsening. | C.Improvement. | D.Research. |
A.It will be sold at a high price. | B.It will be exchanged for food. |
C.It will be thrown back into the sea. | D.It will be well dealt with for reuse. |
A.Fishing is a tough job for fishermen. | B.The sea in Greece is seriously polluted. |
C.He thinks highly of the cleanup project. | D.He still feels ashamed for fishermen’s behavior. |
注意:1. 写作词数应为80左右;2. 可以适当增加细节,以使行文连贯。
Dear Freddie,
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Yours,
Li Hua
China on October 12 officially announced the first group of national parks. Home to nearly 30 percent of the key wildlife species found in China, they cover
The
The Three-River-Source National Park
Commercial activities are banned in the national parks and are all put