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The Impact of Non-Native Species

NEW TREASURE Third Edition Stage2 Lesson2 Read The Impact of Non-Native Species

① What is a “Non-Native Species”?
Non native species are animals and plants (  A  ) a different part of the world. They often create problems for the native animals and plants, ①take / species / of / or / place / even / the / other /. We usually think that all non-native species are harmful. But is this true?

② How Does a Non-Native Species Arrive?
They usually arrive (  B  ) new lands because of human activities. When we travel around the world, we sometimes carry species (  C  ) us ②by accident. ③At other times, humans bring non-native species on purpose. They travel (  D  ) our trains or ships far from their original homes. Now let’s look at some examples (  E  ) these non-native species.

・European rabbits in Australia
In 1859, an English settler brought 13 wild European rabbits (  F  ) Australia ④to / wanted / because / sport / he / them / for / hunt /. However, some of the rabbits survived. After ten years, there were too many rabbits. They ate crops and many native plants. Other animals died because the rabbits ate all their food. There are now more than 200 million rabbits in Australia.

・Brown tree snakes in Guam
People brought brown tree snakes into Guam on ships by accident after World War II. (  G  ) just seventy years, the snakes ate most of the birds on the island. ⑤Nine of the eleven native forest birds in Guam disappeared completely.

③ Are All Non-Native Species Bad?
Scientists and governments around the world think that we should reduce the numbers (  H  ) non-native species. But some of these non-native species actually help the lives of other species.

On an island near Mauritius, the native giant tortoise died out. After that, many native plants on the island could not survive because they couldn’t spread their seeds (  I  ) themselves. The giant tortoise ate the fruit of the plants and spread the seeds in its feces.

So (  J  ) the beginning of the twenty-first century, scientists brought a non-native tortoise, the Aldabra tortoise, to the island. Now these tortoises are eating the fruit of the plants and spreading the seeds. Other ⑥homes / roles / non-native / their / species / can / similar / in / new / play /.

④ What’s Important (  K  ) the Environment?
Non-native species are often dangerous (  L  ) other species. But in some cases, they play an important role in the new environment. ⑦Neither way, we have to think as carefully as we can after we bring a species to a new environment. The impact of non-native species will be one of the greatest environmental problems (  M  ) the twenty-first century. If we don’t make the right choices today, the earth’s natural environment will be ⑧in danger in the future.
  • (  A  )から(  M  )に入る前置詞を答えなさい。
  • 下線①を「あるいはその他の種に取って変わりさえする。」となるように並べ替えなさい。
  • 下線②と反対の意味を持つ語句を文中から抜き出して書きなさい。
  • 下線③を和訳しなさい。
  • 下線④を「彼は持ってきたアナウサギを娯楽で狩りたかったので」となるように並べ替えなさい。
  • 下線⑤を和訳しなさい。
  • 下線⑥を「外来種はそれらの新しい住処で同じような役割を果たせる」となるように並べ替えなさい。
  • 下線⑦には二語誤りがある。それぞれ抜き出して訂正しなさい。
  • 下線⑧の反意語は次の語のどれか答えなさい。 safe / easy / difficult / fun
  • 下の語群の各単語の意味を表すものを㋐から㋕から選び、記号で答えなさい。

settler / reduce / actually / survive / spread /
environment

㋐to continue to live normally in spite of many problems

㋑used to emphasize the real or exact truth of a situation, rather than what people may think

㋒the air, water, and land on Earth, which is affected by man’s activities

㋽someone who goes to live in a country or area where not many people have lived before

㋔if something spreads, it becomes larger so that it affects larger area

㋕to make something smaller or less in size, amount, or price 

  • 次の日本文を英文にしなさい。

彼はたいてい傘を持ってくるが、彼女は時々コンビニで傘を買う。