巨鲸落，万物生 | TEENS好文精选
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今天的精选文章“Life after death巨鲸落，万物生”来自《21世纪学生英文报·小学》第641期第4-5版。
Life after death
巨鲸落，万物生
When whales diein the ocean, their huge bodies fall to the bottom(底部). Scientists have a name for this: a whale fall(鲸落). In March, Chinese scientists discovered(发现) a whale fall in theSouth China Sea(中国南海). This is the first whale fall ever found in China.
After the whale falls to the bottom of the sea, other sea animals eat the meat off the dead whale. But did you know? The dead whale can become an ecosystem(生态系统). Many animals live on it.
What happens during a whale fall?
The whale body goes through three stages(阶段). What happens during these stages? Let’s take a look together.
No.1
The whale bodyattracts(吸引) lots of sea animals, such as small fish, sharks and crabs. They come to eat the skin and muscle of the whale. Usually, it takes at least four months for those animals to eat the whale. Wow, what a good meal!
No.2
After the whale becomes a skeleton(骨架), other animals come. They aremollusks(软体动物) and worms(蠕虫). They build their homes on the bones(骨头). These animals are weak(柔弱的). The huge and strong whale bones protect them. This stage maylast (持续) for about two years.
No.3
Bacteria(细菌) play an important role at the third stage. They disintegrate(分解) the lipids(脂类) in the bones and get energy(能量) from it. Then small animals such as sea snails (海螺) and clams(蛤蜊) eat the bacteria. This stage can last for as long as 100 years because the whale bones are very large.
Some scientists believe there is a fourth stage. When all the usefulparts are gone, the whale will become part of a reef(礁岩). Sea animals live and play around it.
Did you know?
The whale fall found in the South China Sea is 3 meters long. It is still in the first stage. Scientists saw fish eating the tail of the whale. This means the whale died recently.
Whale falls are rare
There are less than 50 natural whale falls in the world. So it is lucky for China to find one. Why are they so rare? The sea is very big. It’s hard for people to look for whale falls in such a big area. What’s more, because of whale hunting (捕鲸), there are fewer whales in the world. Whales are selfless, even when they die. It’s time for us to show respect(尊敬) to these great animals.
本期报纸电子版请点这里
报纸配套课件
| 小学 |
本期报纸配套PPT课件请点这里 |
Lifeafterdeath的配套试题
01
Haveago
Bacteriaplayanimportantroleat the___________stateofawhalefall.
A.first
C. third
B.second
点击空白处查看答案
C
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