冰冻星球（2011）

A position on the ground is also important.
一个大雄鸟想要这个特殊的栖息地
One large male wants this particular perch.
占领栖息地后，它开始唱歌♥
And having got it, he breaks into song.
雄鸟从脖子后面，释放出一种强烈的橘子气味
He now releases a potent tangerine scent
from the back of his neck.
一群粉丝们疯狂了
And a mob of fans go wild.
不过，这个雄鸟
This male, however,
似乎没有什么可提供的
seems to have nothing to offer.
但是一群追星族
But a gaggle of groupies
可能带来危险的干扰
can be a dangerous distraction.
一只北极狐
An Arctic fox.
它发现了一个鸟蛋
It's found an egg.
随着舞台的清空，
With the stage cleared,
最高的栖息地
the highest perch
已空置
has become vacant.
这是一个闪耀的时刻
This is a moment to shine.
它的表演不会被忽视
His display doesn't go unnoticed.
它的橘子香水吸引了一只仰慕者
And his tangerine perfume attracts an admirer.
而且不止一只
And not just one.
现在反要雌性来打动它了
Now it's down to the females to impress him.
在小海雀社会中，两性
In auklet society, both sexes
在选择伴侣时都有发言权
have a say when it comes to choosing a mate.
在盛夏，一天24小时的阳光照射下，
At the height of summer, with 24 hours of sunlight a day,
超过一半的海冰融化了
over half the sea ice melts away.
斯瓦尔巴群岛的海滩
The beaches of Svalbard
提供安全的地方，举出其中的
provide safe places to haul out for one of
一位北极的特殊居民
the Arctic's special residents.
海象
Walruses.
它们一次觅食贝类长达 17 小时
They forage for shellfish for up to 17 hours at a stretch.
现在...
Now...
..该休息了
..it's time for a rest.
每头成年雄性体重超过一吨♥
Each adult male weighs more than a tonne.
然后在沙滩上翻滚……
And heaving oneself over the sand...
..没有水的浮力
..without the support of water
移♥动♥很难
is very hard work.
这个雄性有点特别
This male has a particular
想到达日光浴的...
sunbathing spot in mind...
..50 头的聚集地中间
..right in the middle of the 50-strong huddle.
刺戳有助于分开象群
A prod helps in parting the crowd.
快进去了
Almost in.
终于，它可以安定下来打个盹了……
At last, he can settle down for a snooze...
..挤压来自四面八方
..swaddled on all sides
靠着邻居的身体
by the bodies of his neighbours.
但这不是一个安静的地方
But it's not a peaceful spot.
当有一个烦躁的同床的人时，睡眠并不容易
Sleep isn't easy when a fidgety bedfellow
解决身上的瘙痒时
decides that he has an itch
需要抓挠
that needs scratching.
这是蜕皮的时候，
This is the time to moult,
去除一个人的旧皮及其所有寄生虫
to get rid of one's old fur with all its parasites
并露出下面健康的新外皮
and expose the healthy new coat beneath.
这些天，斯瓦尔巴群岛的夏季气温
These days, Svalbard's summer temperatures
可以飙升到 22 摄氏度
can soar to 22 degrees Celsius.
高温使血液靠近皮肤而泛红
Flushing red by bringing blood close to the skin
这能够帮助它们保持凉爽
helps them to keep cool.
但有时过热是不可避免的……
But some overheating is unavoidable...
..特别是对于一个大雄性
..especially for a big male.
适可而止
Enough is enough.
从这里起来...
Getting up here...
是一个艰难的过程
was a slog.
但是这个雄性找到了一种更好的方法
But this male has found a better way of getting down.
让重力发挥作用
Let gravity do the work.
现在，这很酷！
Now, that is cool!
啊！
Ahhh!
每头海象都这样做， 省时省力
Everyone is doing it. It saves both time and energy.
但海象需要它们能找到的所有技巧
But walruses will need all the tricks they can find.
北极正在变暖，
The Arctic is warming,
而这些爱冷的动物正面临着
and these cold-loving animals are facing
一个岌岌可危的未来
a precarious future.
几千年来，北冰洋一直在冬天结冰
For millennia, the Arctic Ocean has frozen over in the winter
然后逐渐融化
and then gradually melted
在整个春季和夏季期间
throughout the spring and summer.
但在过去的 40 年里，
But in the last 40 years,
夏季海冰的范围减少了 50%
the extent of the summer sea ice has declined by 50%.
有人预测它最早将在 2035 年全部消失
Some predict that it will be ice-free as early as 2035.
这种深刻的变化...
This profound change...
..已经产生巨大的影响
..is already having an impact
北冰洋高度单一化的野生动物
on the Arctic Ocean's highly specialised wildlife.
由于夏季可用来捕猎海豹的海冰较少，
With less summer sea ice from which to hunt seals,
一些北极熊现在游走 400 英里……
some polar bears are now travelling up to 400 miles...
连续游泳长达十天
swimming continuously for up to ten days
寻找陆地
in search of land.
俄♥罗♥斯♥北极附近的弗兰格尔岛...
Wrangel Island, off Arctic Russia...
..唯一的陆地近 100 英里
..the only land for almost 100 miles.
每年夏天，越来越多的北极熊来到这里
Each summer, more and more polar bears come ashore here.
这位新来的妈妈
This newly arrived mother
需要为她的家人寻找食物......
needs to find food for her family...
..但知道不能接近其它成年熊
..but knows not to approach other adult bears.
一只成年的公熊
A full-grown male
可以杀死和吃掉幼崽
can kill and eat a cub
如果其它食物供不应求，也会这样做
and will do so if other food is in short supply.
这个岛上有1000多只熊
There are over 1,000 bears on this one island.
这是北极熊在这个星球上最集中的地方
It's the greatest concentration of polar bears on the planet.
但是在这些偏远的海岸上有食物
But there is food to be had on these remote shores.
海象群...
A walrus colony...
..2,000头之多
..2,000 strong.
海象们惊慌失措
The walruses panic.
并且有海象伤亡
And there are casualties.
战斗爆发
Fights break out.
这不是一个年轻家庭来的地方
This is no place for a young family.
妈妈把她的幼崽叫走
The mother calls her cubs away.
它们必须另找别处
They must search elsewhere.
对于成长中的幼崽来说，草是一顿糟糕的食物
Grass is a poor meal for a growing cub.
夏天的饥饿是一个真正的威胁
And starvation in summer is a real threat.
但是这个吃食的机会...
But this opportunity to feed...
..她不能忽视的
..is one she cannot afford to ignore.
该冒险了
It's time to gamble.
幼崽跟着她
Her cubs follow her.
她敦促它们留下来
She urges them to stay back.
公熊是她的两倍
The males are twice her size.
但是，全神贯注于吃食，
But, preoccupied with feeding,
它们容忍♥她的存在
they tolerate her presence.
然而，她的幼崽的求救信♥号♥♥……
The distress calls of her cubs, however...
..引起不必要的注意
..attract unwelcome attention.
它们的母亲冲上去用她的身体保护它们
Their mother rushes to shield them with her body.
但她似乎在保护家人--
But she seems torn between guarding her family
--和吃食之间左右为难
and feeding herself.
自己留下的幼崽
Cubs left by themselves
很容易成为饥饿的公熊的猎物
are easy prey for a hungry male bear.
但现在她的母性本能爆发了
But now her maternal instincts take over.
面对母亲的愤怒...
Faced with a mother's fury...
占主导地位的公熊退缩了
the dominant male backs down.
在奋力打斗之后...
Having fought her way in...
..幼崽几周来第一次可以吃食了
..her cubs can now feed for the first time in weeks.
北极熊曾经是
Polar bears were once
海冰上的顶端猎人
the supreme hunters on the sea ice.
现在，每年夏天，越来越多的北极熊
Now, each summer, more and more of them
不得不来到陆地上寻找食物
have to come to land in search of food.
北极熊能否存活到下个世纪
Whether the ice bear survives into the next century
将取决于它们所依赖的海冰会发生什么
depends on what happens to the sea ice on which they rely.
与北冰洋所有非凡的野生动物一样，
As with all of the Arctic Ocean's remarkable wildlife,
这就是，未来几年气候如何变化
it's how the climate changes over the coming years