英语听力：自然百科 Mystery Pelican Die-off in Calif 神秘的塘鹅死亡事件

 Wild life experts are trying to figure out why sick, disoriented and bruised² California brown pelicans⁴ are being found in record numbers up and down the west coast of North America.

 

The birds, some of them dead, have been spotted⁵ from Washington State, to Baja California in Mexico.

 

"People are finding them in unusual places, and they are finding these birds are landing in the middle of the roads--some of them are getting hit by cars. There have been reports of birds landing in people’s backyards, which is very unusual behavior for these birds."

 

The pelican³ started appearing late last month in Southern California. The International Bird Rescue Research Center has received dozens of birds at two Californian facilities.

 

"They are coming in very thin and bit disoriented, usually hypothermic. "

 

They also have bruise¹ inside their pouches⁶ and many of the birds' feet have been swollen⁷. Typically, this time of the year there is a significant die-off of young brown pelicans. But marine⁸ biologists say they are seeing a larger-than-normal die-off of adults, and some researchers suspect the corporate⁹ is a naturally occuring toxin¹⁰ found in algae¹¹.

 

"In this particular area over the last three to four years, we’ve seen a regular occurrence, typically in the spring, of a particular group of alga that's capable of producing a very powerful neurotoxin called 'domoic acid'. Through the consumption of those algae, it gets into food chains, into small fishes such as anchovies¹² and sardines¹³ and any organism alike. A pelican eating that material can acquire enough of it that it actually causes neurological distress¹⁴ or even death. "

 

While disorientation is a common symptom among birds poisoned by domoic acid, the pelican’s other symptoms don’t fit their profile. So far, there are no concrete answers. Meanwhile, volunteers are nursing the feather patients.

 

"We are providing them with IV fluids, oral fluids, food, medication if necessary, and getting them eating on their own. "

 

The California brown pelican is a sub-species of the brown pelican. Over-hunting and DDT poisoning caused brown pelican populations to plummet¹⁵ during the first half of the 20th century. And by the early 1970s the birds were all but gone. After DDT was banned in the US in 1972, the species made a dramatic comeback.

1 bruise   

n.青肿，挫伤；伤痕；vt.打青；挫伤

参考例句：

• The bruise was caused by a kick.这伤痕是脚踢的。
• Jack fell down yesterday and got a big bruise on his face.杰克昨天摔了一跤，脸上摔出老大一块淤斑。

2 bruised   

[医]青肿的，瘀紫的

参考例句：

• his bruised and bloodied nose 他沾满血的青肿的鼻子
• She had slipped and badly bruised her face. 她滑了一跤，摔得鼻青脸肿。

3 pelican   

n.鹈鹕，伽蓝鸟

参考例句：

• The pelican has a very useful beak.鹈鹕有一张非常有用的嘴。
• This pelican is expected to fully recover.这只鹈鹕不久就能痊愈。

4 pelicans   

n.鹈鹕( pelican的名词复数 )

参考例句：

• Kurt watched the Pelicans fire their jets and scorch the grass. 库尔特看着鹈鹕运兵船点火，它们的喷焰把草烧焦。 来自互联网
• The Pelican Feeding Officers present an educational talk while feeding the pelicans. 那个正在喂鹈鹕的工作人员会边喂鹈鹕边给它上一节教育课。 来自互联网

5 spotted   

adj.有斑点的，斑纹的，弄污了的

参考例句：

• The milkman selected the spotted cows,from among a herd of two hundred.牛奶商从一群200头牛中选出有斑点的牛。
• Sam's shop stocks short spotted socks.山姆的商店屯积了有斑点的短袜。

6 pouches   

n.（放在衣袋里或连在腰带上的）小袋( pouch的名词复数 )；（袋鼠等的）育儿袋；邮袋；（某些动物贮存食物的）颊袋

参考例句：

• Pouches are a peculiarity of marsupials. 腹袋是有袋动物的特色。 来自《简明英汉词典》
• Under my eyes the pouches were heavy. 我眼睛下的眼袋很深。 来自《简明英汉词典》

7 swollen   

adj.肿大的，水涨的；v.使变大，肿胀

参考例句：

• Her legs had got swollen from standing up all day.因为整天站着，她的双腿已经肿了。
• A mosquito had bitten her and her arm had swollen up.蚊子叮了她，她的手臂肿起来了。

8 marine   

adj.海的；海生的；航海的；海事的；n.水兵

参考例句：

• Marine creatures are those which live in the sea. 海洋生物是生存在海里的生物。
• When the war broke out,he volunteered for the Marine Corps.战争爆发时，他自愿参加了海军陆战队。

9 corporate   

adj.共同的，全体的；公司的，企业的

参考例句：

• This is our corporate responsibility.这是我们共同的责任。
• His corporate's life will be as short as a rabbit's tail.他的公司的寿命是兔子尾巴长不了。

10 toxin   

n.毒素，毒质

参考例句：

• Experts have linked this condition to a build-up of toxins in the body.专家已把这一病症与体内毒素的积累联系起来。
• Tests showed increased levels of toxin in shellfish.检验表明水生有壳动物的毒素水平提高了。

11 algae   

n.水藻，海藻

参考例句：

• Most algae live in water.多数藻类生长在水中。
• Algae grow and spread quickly in the lake.湖中水藻滋蔓。

12 anchovies   

n. 鯷鱼，凤尾鱼

参考例句：

• a pizza topped with cheese and anchovies 奶酪鳀鱼比萨饼
• Pesto, mozzarella, parma ham, sun dried tomatoes, egg, anchovies. 核桃香蒜，马苏里拉，巴马火腿，干番茄，鸡蛋，咸鱼。

13 sardines   

n. 沙丁鱼

参考例句：

• The young of some kinds of herring are canned as sardines. 有些种类的鲱鱼幼鱼可制成罐头。
• Sardines can be eaten fresh but are often preserved in tins. 沙丁鱼可以吃新鲜的，但常常是装听的。

14 distress   

n.苦恼，痛苦，不舒适；不幸；vt.使悲痛

参考例句：

• Nothing could alleviate his distress.什么都不能减轻他的痛苦。
• Please don't distress yourself.请你不要忧愁了。

15 plummet   

vi.(价格、水平等)骤然下跌；n.铅坠；重压物

参考例句：

• Mengniu and Yili have seen their shares plummet since the incident broke.自事件发生以来，蒙牛和伊利的股票大幅下跌。
• Even if rice prices were to plummet,other brakes on poverty alleviation remain.就算大米价格下跌，其它阻止导致贫困的因素仍然存在。