0

关于濒危动物英语作文精选(精品19篇)

浏览

4103

作文

359

我喜欢的动物——熊猫英语

全文共 639 字

+ 加入清单

panda is one of the scarcest animals. people in the world like it very much.

there used to be many pandas in china long ago. as the balance of nature was destroyed and the weather was getting warmer and warmer, pandas became less.

but at present, the number of pandas is increasing year by year. there are now so many pandas that some are being sent to other countries so that people there can enjoy them.

nowadays, the biggest nature park for panda in china is in sichuan. there is a research centre for nature and wild life there. scientists hope that one day they will have enough pandas to be set free and let them live in the wild again.

展开阅读全文

更多相似作文

篇1:保护珍惜动物英语作文篇

全文共 1032 字

+ 加入清单

Animal Protection

Animal is the friend of mankind, is an important part of the natural ecosystem. It is human precious naturalresources. Protect animals to maintain natural ecological balance has important significance.

But now many animals are facing the danger of extinction.With the development of society, pesticide used and serious pollution, city sewage .The wild animal living area is becoming increasingly narrow. Many of the animal is facing a food crisis currently . Whats more, in order to obtain wild animal of precious materials, humans are killing animals.

In order to maintain ecological balance, we should take some effective measures to protect animals.We should develop pollution standards to reduce emission of toxic substances, prevent the killing of some rare animals strictly. We can also establish a national park as a wild animal protection area. The most important thing is to improve people s knowledge of animal care.

Let us join hands in creating a harmonious coexistence of human and animal beautiful homes!

展开阅读全文

篇2:保护动物英语作文

全文共 1368 字

+ 加入清单

If you see the using life of bridge, would you put down your hand gun; If you saw the dead ant kingdom by compatriots hero, would you put down your hands cut off the tools of ants.

Yes, sometimes life is so slim, slim like sand in the sea. In the summer, when you are running in the grass that you follow the foot to jump, do you know how many creatures will be gone from this world? I can responsibly tell you: you are the one feet for insects, equals eight pounds of C4 explosives! Eight pounds of C4 explosives can blow up a skyscraper! Can you imagine the?

Every 5 minutes on average in the world will be 0.002 species extinction! The earth is warming, glaciers in melt, our beautiful earth will no longer be a home... The kinds of animals in gradually reduce, humans will get lonely; If we dont consciousness, is also want to use the machine to the zoo after animals? !

All of the young pioneers, please join me in calling for: take good care of life is the responsibility of the young pioneers, we should cherish life, protect animals!

如果你看到了那用生命搭成的桥,你会不会放下你手中的猎枪;如果你看到了那因同胞而死去的蚁国英雄,你会不会放下你手中灭蚁的工具。

是的,有时生命是那么的渺茫,渺茫的就象大海里的细沙。在夏天,当你在草丛中奔跑你那随脚一跳,你知道会有多少生物会从这世界上逝去吗?我可以负责任的告诉你:你那一脚对昆虫来说,就等于八磅C4炸药!八磅C4炸药可以一口气炸掉一座摩天大厦!你想象的到吗?

世界上平均每隔5分钟就会灭绝0.002种生物!地球在变暖,冰河在融化,我们美丽的地球将不再是一个家……动物的种类在逐渐减少,人类将渐渐变的孤独;如果我们还不觉悟,难道以后动物园也要用机器来制造动物吗?!

所有的少先队员们,请和我一起呼吁:爱护生命是少先队员应尽的责任,我们要珍爱生命,保护动物!

展开阅读全文

篇3:保护野生动物英语作文带翻译

全文共 1044 字

+ 加入清单

Protecting the Wild Animals

Last week, I saw a very impressive documentary about panda. A professor studied panda in the early 1980s went to the wild life and kept trace of wild giant panda for many years. As a result, he found that it was human being that made these lovely animals die out. At that time, many people believed that giant panda became less because of the low rate of newborn babies. But it was not true. People cut trees for making profit at that time. Panda lose homeland and they lacked of food. Thanks to these valuable data, the government took the policy to protect the animals. So today, the number of giant panda is increasing. People realize the importance of protecting the environment and it is the best way to protect wild animals, they are the indispensable part of the nature.

上周,我看了一部令人印象非常深刻的关于熊猫的纪录片。一位教授在20年代80年代早期就开始研究熊猫,他到野外生活,多年寻找野生大熊猫的踪迹。结果,他发现,正是人类,让这些可爱的动物面临灭绝。当时,许多人认为,大熊猫变少是因为新生儿的低出生率。这是不正确。人们为了利益砍伐树木,熊猫失去了家园,也没有食物吃。多亏了这些有价值的数据,政府采取了政策去保护它们。所以现在,大熊猫的数量正在增加。人们意识到保护环境的重要性,这也是最好的方法来保护野生动物,因为它们是大自然不可或缺的一部分。

展开阅读全文

篇4:英语作文保护珍稀动物

全文共 1565 字

+ 加入清单

Animals Need Protecting

It is suggested that people have been aware of the issue--lack of preservation for endangered spieces, animals and plants, but as you see , they placed little efforts to cope with the problem.despite the versatility and intricacy of instruments , I would pore over some of the most striking ones and offer alternatives afterwards.

One of the major reasons , causing peoples inocence of protecting animals, is that the government did not function well as an educator, arosing peoples initiative in shielding wild animals, which led to the consequence that people do not know their responsibility to prevent animals from dangers, and specific knowledge in guarding them. what is equally important as the reason mentioned above is that media did not meet our satisfaction to inform the mass of the emergency which is crutial in arousing peoples conciousness to keep animals safe.

In spite of the serious problem, measure leading to profound improvement still can be taken. owning to the fact that funds are insufficient in some developing countries, developed countries or international organizations should shoulder more burden -- finacing them in order to capacitate them to accompolish the protection of animals. at the same time, education in telling people the way to make animals harboured ought to be focused on, thus resulting in peoples better awareness in the camouflage of our pla#from cutest creatures.

It is belived by me that if correct actions are taken to preserve animals, any kind of them will be far away from extinction forever.

展开阅读全文

篇5:英语保护动物初一

全文共 1288 字

+ 加入清单

Animals are natural resources that people have wasted all through our history.Animals have been killed for their fur and feathers, for food, for sport, and simply because they were in the way.Thousands of kinds of animals have disappeared from the earth forever.Hundreds more are on the danger list today.About 170 kinds in the United States aloneare considered in danger。

Why should people care? Because we need animals, and because once they are gone, there will never be any more。Animals are more than just beautiful or interesting.They are more than just a source of food.Every animal has its place in the balance of nature.Destroying one kind of animal can create many problems.For example, when farmers killed large numbers of hawks, the farmers stores of corn and grain were destroyed by rats and mice.Why? Because hawks eat rats and mice, with no hawks to keep down their numbers, the rats and mice multiplied quickly。

Luckily, some people are working to help save the animals.Some groups raise money to let people know about the problem.And they try to get the governments to pass laws protecting animals in danger.Quite a few countries have passed laws.These laws forbid the killing of any animal or planton the danger list.Slowly, the number of some animals in danger is growing。

展开阅读全文

篇6:关于动物的英语

全文共 461 字

+ 加入清单

I have a very beautiful cat.Its colour is white or yellow .its name isHaahua .Ithink it is my favourite cat .she likes sleep playing with the bell .she love ratting meat ,Though it is a kind of animals ,I treat it as my friend .sometime I give her some fish or pork to eat .When she sees the fool she begin to cry miao miao .As if she is very hungry and thirsty .Wherever I amwalk she follws me .

How happy I am !How nice my friend is !I love her more and more .

展开阅读全文

篇7:保护濒危动物的

全文共 619 字

+ 加入清单

“重庆市大巴山动物园的珍惜濒危动物╠五只大熊猫患上了离奇绝症需送国外抢救治疗,请同学们伸出援助之手,帮助那正要踏进死神殿堂的动物们吧!”第三节课间休息时,广播里传出动员大家出动的号召。

听到广播号召,同学们三三两两在教室议论起来,这时,只见班长杜鑫走上讲台,大声对我们说:“同学们,保护珍惜动物是我们共同的责任,大家都把平时的零用钱捐献出来,为抢救大熊猫做一点贡献吧!”大家听了,齐声拥护。班长到座位上拿出笔记本,就开始纪录同学们捐款了。同学们一齐围了上来,手里拽着一元、二元、五元的钞票,争先恐后地递给班长。班长的周围被围得水泄不通,不停地收钱,记载,一会大颗的汗珠开始从太阳穴顺流而下,汗珠最后降落在等记的课桌上。

下午第一节课的上课铃响了,老师来到课堂看到了同学捐款的场面,静静地观看着,脸上露出了欣慰的笑意。捐款登记完了,老师对我们说:“一会儿,学校将要举行捐款仪式,我们到操场上集合,请大家遵守秩序。”

全校同学们都来到操场上,主席台中间矗立着一个捐款箱,校长简单介绍后开始进行捐款仪式。校长,老师们依次走到捐款箱,投进了捐款,各班的班干部也带着全体同学的心愿走上捐款席,用一张写着多少钱,捐款慢慢地投了进去,同学们默默地注视着,脸上充满了自豪。

“一年级一班捐款125元……五年级六班捐款145元……总收到捐款4千多元,感谢同学们的爱心!”校长宣读完毕,操场上响起热烈的掌声。

这次活动,让我感到,我们要充满爱心,因为只有爱能创造奇迹!

展开阅读全文

篇8:保护动物的英语词中英对照

全文共 1078 字

+ 加入清单

那天,我妈妈给我买了两只小鸭子。我很高兴,把两只小鸭子放在箱子里,听着它们的叫声,我的心情非常的好。

That day, my mother bought me two little ducks. I am very happy, the two little ducks on the box, listening to their voices, I feel very good.

第二天,我想让同学到我家看看我的鸭子,我给同学打电话,让他来。他看了鸭子,也觉得很好玩。我们把一只小鸭子放在地上,它向前走了几步就摔倒了,它抓了起来,又摔倒了,我们哈哈大笑。我们玩够了,就把小鸭子扔进了箱子里,去玩玩具了。

The second day, I want to have a look to my classmates my duck, I call for students, let him come. He saw a duck, and enjoy it. We put a duck on the ground, it went forward a few steps and then fell, it caught up, and fell down, and we laughed. We play enough, put the duck into the box, to play with toys.

下午,我和爸爸去看小鸭子,看见一只鸭子肚子朝上,翅膀和脚在抖动,它叫的声音很大,好像在哭一样。爸爸把小鸭子扶起来,小鸭子又倒了。我突然想起来我把小鸭子扔进箱子里的事,呀!我是杀人凶手呀!我哭了。小鸭子最后死了,我很伤心。

Afternoon, my father and I went to see the little duck, see a duck belly up, wings and feet in jitter, it sounds great, like crying. Dad put up little duck, duck down. I suddenly remembered that I took the little duck into the box,! I am a murderer! I cried. Little duck finally died, I am very sad.

从那时起,我就开始爱护小动物了。

From then on, I began to love little animal.

展开阅读全文

篇9:写海洋动物的英语作文

全文共 1854 字

+ 加入清单

Orcas are not related to whales at all, other than being ocean-dwelling mammals. Rather, they are close kin to dolphins. While it was believed that they were a single species, recent research indicates that they may, in fact, be comprised of several different species of Orca. You can find them in every ocean in the world, though they tend to favor the colder waters around Antarctica and the North Atlantic or Pacific. The only predator they possess is humankind. While theres a deadly standoff between the two species, Orcas proliferate in the wild, and have an incredible life span. The males usually live as long as sixty or seventy years, while the females—who are excluded from the sometimes-violent competition for mates—may live a hundred years or more in the wild.

虽名虎鲸,但不同于海洋其他哺乳动物,非鲸目,海豚科的近亲。此前一直认为虎鲸只有一种,但最近的调查显示虎鲸种类繁多。部分虎鲸会终年停留于南极、大西洋北部和太平洋等温度较低的海域,但总体来看,它们的活动范围几乎覆盖全世界水域。它们堪称海上霸王,唯一的天敌也只有人类了。虎鲸全年都可以交配,数量庞大,雄鲸的平均寿命在60到70年左右,野生雌鲸不同于雄鲸经常参与猎杀食物,寿命可达100年甚至更长。

Theyve been observed reaching speeds of around 30 miles per hour, although some Orcas may utilize much greater bursts of speed, based upon their favored prey. Resident pods in the Pacific Northwest have shown a decided preference for salmonids—specifically, Chinook salmon. This presents a conflict with the goals of companies that rely on high yields of salmon for profit. Several communities of killer whale seem to favor beach and ice floe ambush approaches, snatching seals and walruses or even sea birds from their resting places. Others, located in the Southern Hemisphere, take up the challenge of hunting sharks in the open sea, as well as feeding on species of rays and other fish abundant in the cold southern waters.

虎鲸约时速30英里,当然也有爆发力更强的,为了追捕中意的猎物,时速可以更快。太平洋西北海域的虎鲸族群偏爱三文鱼,尤其是大鳞三文鱼。这就和沿岸经营三文鱼生意的公司产生一定的利益冲突。虎鲸族群喜欢在浮冰区伏击猎物,捕杀海豹、海象或者在这里歇脚的海鸟。在南半球海域里,有些虎鲸还会在公海里捕杀鲨鱼,也会以鳐和其他鱼类为食。

展开阅读全文

篇10:关于人与动物的英语作文

全文共 484 字

+ 加入清单

As is often read in the newspaper reports, wild life especially the rare species is threatened with extinction. Human beings are making attempts to hunt wild animals for a big profit., which, of course, results in a sharp decrease in the number of animals. So it is high time for us to take quick action to protect them. First of all, it’s quite necessary for every citizen to realize the importance of animal protection. Only by knowing its importance can people develop a sense of .

展开阅读全文

篇11:关于写动物英语

全文共 679 字

+ 加入清单

我最喜欢的动物My Favorite Animal

Do you know what kind of animal I like most? It’s monkey. Monkey is a kind of lovely animal. Many people like monkeys very much. Generally, monkey has small body covered with fur. Some kinds of monkeys have two big eyes and ears and a long tail. I can see them on TV or the zoo. Every time I go to the zoo, I will go to see them. Monkeys often stay in trees and jump between them. They are so lively and favorable. When they are happy, they will act for visitors. It’s very funny.

你知道我最喜欢的动物是什么吗?是猴子。这是一种非常可爱的动物,很多人都非常喜欢它们。一般来说,童子的身子比较小,身上长满了毛。其中的一些种类有两只大眼睛、大耳朵和一条长尾巴。我可以在电视上或动物园里看见它们。每次我去动物园,我都会去看猴子。它们常常待在树上,在树木之间跳来跳去,非常活泼,讨人喜欢。它们高兴的时候,还会特别表演给游客看,非常好玩。

展开阅读全文

篇12:保护动物的英语作文

全文共 482 字

+ 加入清单

Animals Need Protecting

There are more and more endangered animals at present,so how to protect them has been our task of top priority 。 Its wrong for people to hunt animals for their meat and feather,for they are our good friends。We should protect them instead of killing them。Giant pandas,which are one of the endangered animals,live in the forests and live on bamboo lealves。They can just live safely in the natural protection zones。We should stop killing animal and protect them。

展开阅读全文

篇13:英语作文:我最喜爱的动物

全文共 871 字

+ 加入清单

导语:你最喜欢的动物是什么呢?下面是yuwenmi小编为大家整理的相关英语作文,欢迎阅读与借鉴,谢谢!

My favorite animals are swans.they are white.they can swim very well.I think they look like a beautiful girl in a white dress.They have a pair of wings and they can also fly well.I believe they are angles from the sky.they bring us love and make us happy.They are always friendly to us.We cant hurt them,because they are our friend.I love them!I like dogs,too.they are not beautiful,but they are the best friends.they keep the thieves away.Dogs have the best listening and eyes.they can hear in the nosiy,see in the dark.If we are in danger,they will help us at once.And they dont mind their lives.So,I love them.

【参考翻译】

我最喜欢的动物是天鹅都是白色的可以游得很好。我认为他们看起来像穿着白色衣服的美丽的女孩,有一双翅膀,它们也会飞。我相信他们是从他们的角度给我们带来爱和快乐。他们一直对我们很友好。我们不能伤害他们,因为他们是我们的朋友。我爱他们!我喜欢狗,它们不美丽,但他们是最好的朋友,把小偷吓跑了。狗有很灵敏的眼睛能听到在闹市,在黑暗中看到。如果我们有危险,他们会立刻帮助我们。他们不介意自己的生活。所以,我爱他们。

展开阅读全文

篇14:小学生介绍动物的英语作文

全文共 1918 字

+ 加入清单

On Saturday, I went to my grandparents house to play, entered my grandpa said to me: "home to a puppy." I ran quickly excitedly to the kennel.

This little guy is sleeping, I to control his feeling excited, could not help but to touch it by hand, but who knows, the puppy vigilance is so high, my hands touched it hair, it is all of a sudden I woke up to now. It eyes, big carefully look at me, as if to say: "who are you? How do I havent seen you?" I see, oh! Big round eyes, a small nose, cherry small mouth, not fat or thin face, and a pair of big ears and a air shook tail. In the summer it will lick up scattered cooling, is really a handsome boy!

After dinner, I also want to see this little one to eat, then took a piece of meat on the ground, I thought to myself, so delicious it must be very like it. But to his surprise, its just to smell the smell, and go to the side. I think, if it is afraid of being seen just refused to eat. Then, I hid behind the door, secretly observe it. Sure enough, little guys walking slowly in the past, and look at the then eat it with relish. It ate a piece of meat, I then from behind the door to come out and play with it. I threw a ball out of the distance, said to it: "help me to pick up the ball back!" It seemed to understand my words, kicking ran in the past, with his mouth put the ball has been sent to my side, and in this way, we are happy to play up.

My dog is so cute!

星期六,我去爷爷奶奶家玩,一进门爷爷就跟我说:“家里来了一只小狗。”我赶紧兴奋地往狗窝跑去。

这个小家伙正在睡大觉,我控制不住自己激动的心情,忍不住用手摸了它一下,可谁知,小狗的警惕性那么高,我的手刚碰到它的毛,它就一下子被我给惊醒了。它把眼睛睁得大大的,仔细地看着我,仿佛在说:“你是谁呀?我怎么没看见过你呢?”我一看,哟!圆溜溜的大眼睛,小小的鼻子,樱桃形的小嘴,不胖不瘦的脸蛋,还有一对神气的大耳朵和一条摇个不停的尾巴。夏天的时候它会把舌头舔出来散散热,真是一只帅气的小家伙呀!

吃完饭后,我也想去看看这小家伙吃东西的样子,便拿了一块肉放在地上,我心想:这样美味它一定很喜欢吧。但出乎意料的是,它只是去嗅了嗅,又走到了一边。我想,是不是它怕被人看到才不肯吃呢。于是,我就躲在了门背后,偷偷地观察它的动静。果然,小家伙慢慢地走了过去,四面看了一下便津津有味地吃了起来。看它吃完了一块肉,我便从门后走出来和它一起玩了起来。我把一个球扔到了远处,对它说:“帮我去把球捡回来!”它仿佛听懂了我的话,飞快地跑过去用脚踢,用嘴顶把那个球一直送到了我的身边,就这样,我们高兴地玩了起来。

我的小狗实在是太可爱了!

展开阅读全文

篇15:保护动物英语作文100字

全文共 806 字

+ 加入清单

I am a student from Xinhua High School in Chongqing,China. Informed that you have a vacancy for a student to serve as the spokesman for animals, I cannot resist my inner excitement,hoping to seize the opportunity to do something for animals .

In my mind,nothing can delight me so much as caring for animals. Wherever I go and whatever I do, I usually keep in mind that animals are angels from the heaven, which bring us endless comfort and pleasure. I have been a panda lover since my childhood. Panda is so lovely that brings fun to people and they are regarded as the treasure of our country. Unfortunately,such a rare species is now faced with the danger of being extinct。What I am eager to do is to raise people’s awareness of animal protection and appeal to more people to care for our earth companies.

展开阅读全文

篇16:动物的英语MyFavoritePet

全文共 389 字

+ 加入清单

my favorite animal is rabbit. its name is sweet. sweet has long ears. it’s very small. it’s white. it has a short tail. it has red eyes. it likes eating carrots. it likes jumping. it goes jumping three times a day. i like it very much. it’s lovely. it’s my best friend. i like the rabbit.

我最喜爱的动物是兔子。它的名字叫糖果。糖果有一对长耳朵。它长得又小又白,有一只短尾巴,一对红色的眼睛。它喜欢吃萝卜,喜欢蹦蹦跳跳的,一天能跳三次。我非常喜欢它。它特别可爱,它是我最好的朋友,我喜欢兔子。

展开阅读全文

篇17:含动物的英语谚语

全文共 897 字

+ 加入清单

You cannot catch old birds with chaff.用粗糠捉不住老鸟。

you can lead a horse to water , but you cannot make him drink牵马到河易,逼马饮水难。

Unable to fly ,in vain the bird flaps his wings. 鸟儿不会飞,拍翅也枉然。

Trusted aids are eliminated when they have outlived their usefulness. 兔死狗烹。

The fox mourns the death of the hare. 兔死狐悲。

Pigs may fly,but they are very unlikely birds. 猪儿纵会飞,终究不是鸟。

One swallow does not make a summer. 一燕不成夏。

One swallow does not make a spring. 孤燕不报春。

Fine feathers make fine birds. 人要衣装,马要鞍。

Early bird catches the worm。早起的鸟儿有虫吃。

Each bird loves to hear himself sing. 鸟儿都爱听自己唱。

Birds in their little nests agree. 同巢之鸟心儿齐。

Better be a free bird than a captive king. 宁为自由鸟,不作被困王。

A running horse needs no spur. 奔马无需鞭策。

A rabbit isn’t to be harnessed. 兔子驾不了辕。

A horse may stumble on four feet. 马有四条腿,亦有失蹄时。

A good horse cannot be of a bad colour. 好马不会毛色差。

A bird is known by its note, and a man by his talk. 听音识鸟,闻言识人。

展开阅读全文

篇18:我喜欢的动物小学英语

全文共 381 字

+ 加入清单

A week ago, my best friend gave me a lovely cat. I love it very much. It is special. Its fur is black not yellow. So I call it little black. It has the same taste with me. We all like eating fish. So, after it comes to my home, nearly every meal will appear fish. I like playing with it. It always makes me laugh. Every morning, it will wake me up. It brings much happiness for me.

展开阅读全文

篇19:写濒临危机动物的英语作文北极熊

全文共 3755 字

+ 加入清单

When the Arctic Ocean freezes over in the autumn, polar bears set off in search of their favorite meals: fatty ringed seals and bearded seals. By the summer, the sea ice begins to melt and break apart. Deprived of access to the tasty seals, polar bears spend the summer fasting. At least, thats whats supposed to happen. As the planet warms, the warmer ice-free season is getting longer and longer. So whats a hungry bear to do?

Scientists once thought that polar bears might survive by supplementing their pinniped diet by turning to terrestrial foods like snow geese, their eggs and caribou.

"Weve had this debate in the literature about whether terrestrial foods are nutritionally relevant to polar bears during the on-land season when the ice has melted."

University of Alberta biologist Nick Pilfold.

"And weve known for a long time, going back to research in the early 70s, even going to back to early explorer logs, that polar bears will consume terrestrial based foods. But the debate was always whether those foods actually add up, energetically." In other words, do these substitutes provide enough nutrition to make up for the lost seals?

To find out, Pilfold and his colleagues estimated the weight lost each day by polar bears in the wilds of western Hudson Bay during the ice-free season, when they could ostensibly be chowing down on terrestrial foods. Then they compared that to the weight lost by bears that are temporarily held in Manitobas Polar Bear Alert Program.

While captive, the bears do not eat. They drop about one kilogram each day. But the wild bears, who had access to the Arctic snack bar, lost the same amount of weight each day. The results are in the journal Physiological and Biochemical Zoology.

"Which is really saying that the terrestrial foods do not have dense enough energy to offset the mass loss. So this idea that bears can just switch from eating sea ice–based food to land food and thats going to help supplement against longer ice-free seasons, that really doesnt show up in the data."

The problem is that polar bears evolved to rely on the marine diet.

"The food on land is protein and carbohydrate based, and the food the polar bears really focus on is fat. Fat is the name of the game for these bears; theyre highly adapted to absorbing that fat into their system and putting it onto their body as body mass, so they can fast on it later on. And the only thing thats going to provide them with that type of fat are marine mammals. And they can only access those marine mammals when theres sea ice."

Adult males can go eight months without food. But younger, sub-adult bears, which are no longer nursing and must hunt, cant last as long without sea ice. So as the Arctic warms, younger polar bears will disproportionately die out. Leaving the species survival in doubt.

北冰洋在秋季结冰以后,北极熊就会出发去寻求它们最喜欢的食物:富含脂肪的海豹和胡子海豹。海冰在夏季开始融化断裂。这使北极熊在夏季无法吃到美味的海豹,所以它们进入禁食期。至少,情况应该是这样。但是由于地球变暖,温暖的无冰季节越来越长。那饥饿的北极熊要怎么办?

科学家曾经认为,北极熊可能会转向陆地上的食物来补充它们对鳍足类动物饮食的需求,进而生存下去,这些陆地食物包括雪雁、雪雁蛋和北美驯鹿。

“文献中有过这类辩论,即在寒冷融化时陆地食物是否能满足北极熊的营养需求。”

尼克·皮尔福德是加拿大阿尔伯塔大学的生物学家。

“通过上世纪70年代初的研究,还有早期的探险者日志,我们很早以前就知道,北极熊会以陆地食物为食。但是辩论的焦点在于,这些食物是否能增加北极熊的能量。”换句话说,这些替代食物能否为北极熊提供足够的营养,弥补不能进食海豹带来的损失?

为了解开这个疑惑,皮尔福德及同事对西哈德逊湾荒野地区的北极熊在无冰季期间每天失掉的体重进行了估算,从表面上看,北极熊在这段时间食用了陆地食物。随后,他们将这一数据与通过马尼托巴北极熊预警计划暂时捕得的北极熊所失掉的体重进行了对比。

在被关期间,北极熊不吃东西。它们的体重每天大约下降1公斤。虽然野生北极熊能享用北极“小吃”,但是它们的体重每天也同样会下降1公斤。这一研究结果发表在《生理学和生化动物学》期刊上。

“显然结果表明,陆地食物不能为北极熊提供足以抵消大量损失的能量。所以,北极熊可以从食用海冰下面的食物转向食用陆地食物,并帮助它们对抗日益延长的无冰季这个观点,并没有在这项数据中得到证明。”

问题是,北极熊进化成了依靠海洋食物的动物。

“陆地食物以蛋白质和碳水化合物为基础,而北极熊需要的食物以脂肪为主。脂肪是这些熊真正需要的东西;它们高度适应的情况是,将脂肪吸收进它们的系统中,然后把这些脂肪放在身上以增加体重,这样它们之后就可以依靠这些脂肪来度过禁食期。唯一能提供给北极熊这种脂肪的就是海洋哺乳动物。但是它们只能在有海冰时食用到这些海洋哺乳动物。”

成年北极熊可以8个月不进食。但是小一些的未成年北极熊已经不再被哺育,它们必须要去猎食,可是它们不能在漫长的无冰季期间一直不进食。所以,随着北极地区变暖,较小的北极熊将会大批死亡。这使这些物种的生存成为问题。

展开阅读全文