NEW TREASURE Third Edition Stage2 Lesson2 Read
The Impact of Non-Native Species
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
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
・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.
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⑧の反意語は次の語のどれか答えなさい。 safe / easy / difficult / fun
settler / reduce / actually / survive / spread /
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
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