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当你俯瞰地球表面
When you overlook the Earth's surface

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让人无法不为自然界的力量
it's impossible not to be impressed

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与其纯粹的宏伟壮丽
by the sheer grandeur,splendour and power

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而叹为观止
of the natural world.

5
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我们呈现了众多这样的奇迹
It's been ten years since we explored these wonders

6
00:00:30,030 --> 00:00:32,580
在《地球脉动》这一电视节目中
in the first series of Planet Earth.

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时至今日  世界已大有变化
And since then, much has changed.

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我们将用全新的方式展示
We can now show life on our planet

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地球上的生命
in entirely new ways,

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带你以前所未有的近距离接触动物
bring you closer to animals than ever before,

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首次揭示野生动物的精彩瞬间
and reveal new wildlife dramas for the very first time.

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而且不只这些
But that's not all.

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我们的星球也在变化
The planet has changed, too.

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大自然从未像现在一样
Never have those wildernesses been as fragile

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脆弱而又珍贵
and as precious as they are today.

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恰逢自然世界这一关键时刻
At this crucial time for the natural world,

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我们将再次启航  踏遍全球
we will journey to every corner of the globe

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去探索这颗星球上最宝贵的财富
..to explore the greatest treasures of our living planet

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去揭秘动物们为了生存  突破的种种极限
and reveal the extreme lengths animals go to to survive.

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最后  我们还将回到城市
Finally, we will explore our cities

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探寻生命是如何适应这个地球上最新兴的栖息地
to see how life is adapting to the newest habitat on Earth.

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这里是《地球脉动》第二季
This is Planet Earth II.

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《地球脉动2》  第一季  第一集

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岛屿

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地球上有成千上万的岛屿
There are hundreds of thousands of islands,

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每一座岛屿都是一个迷你世界
each one a world in miniature,

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是地球的一个缩影
a microcosm of our living planet..

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这些偏僻岛屿上为生存所做的努力
The struggles to survive on these remote lands

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正如地球上所有生命都要面临的挑战
reflect the challenges faced by all life on Earth.

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英语解说  大卫·爱登堡

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巴拿马海岸线边的埃斯库多岛
The tiny island of Escudo off the coast of Panama.

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是侏三趾树懒的栖息地
Home to the pygmy three-toed sloth.

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这是一只雄性树懒  在这里生活得十分惬意
This is a male, and life here suits him well.

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红树林为他提供食物
Mangroves provide all the leaves he can eat

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也没有天敌前来叨扰
and there are no predators to worry him.

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岛上的生活似牧歌般悠闲
Island life may seem idyllic

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但这是有代价的
but it comes at a price.

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这座岛上只有几百只雌性侏三指树懒
There are only a few hundred pygmy sloths in existence.

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而他需要配偶
And he needs a mate.

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这雌性的叫声
That's an enticing call...

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好生诱人
..from a female.

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就在不远的某个地方
Somewhere out there.

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对树懒来说  这反应堪称迅猛
And this, for a sloth, is a quick reaction.

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但问题是  中间隔着一渊深潭
The problem is, there's deep water between them.

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那么一只气血方刚的树懒会怎么做呢
So what should any red-blooded sloth do?

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当然是游过去
Swim, of course.

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那会是她吗
Could this be her?

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他尽全力加快速度
He does his best to put on a turn of speed.

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但叫的不是她
But she's not the one.

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这只母树懒已经有了一只幼崽
She already has a baby

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在幼崽六个月后长大离开之前
and she won't mate again until it leaves her

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她不会再次交配
in about six months' time.

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即使生活在天堂之岛也会有限制
Even life on a paradise island can have its limitations.

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但至少她就在不远处
But at least she can't be far away.

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地球上所有的侏三指树懒都生活在
The world's entire population of pygmy sloths is isolated

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这片不及纽约中央公园大小的岛屿上
on a speck of land no bigger than New York's Central Park.

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岛屿的大小极大地影响着
The size of an island has a huge influence

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生活在那里的动物
on the fate of those cast away there.

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这是印度尼西亚的科莫多岛
The island of Komodo in Indonesia.

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龙之巢穴
Home to dragons.

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体长三米  重达六十八公斤
Ten feet long and weighing an impressive 150 lbs,

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他们是地球上现存体型最大的蜥蜴
these are the largest living lizards on the planet.

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大型食肉动物在岛屿上并不常见
It's unusual to find large predators on islands.

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然而  四百万年来  科莫多巨蜥一直称霸这里
Yet, for four million years, the Komodo dragon has dominated here.

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这么小的岛屿似乎不可能
It might seem there wouldn't be enough food

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为这种庞然大物提供充足的食物来源
to support such giants on this relatively small island.

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但冷血爬行动物只需要
But reptiles, being cold-blooded,

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肉食性哺乳动物十分之一的食物量
need only about a tenth of the food a carnivorous mammal would.

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巨蜥一餐可以支撑一个月
A single meal will last a dragon a month.

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他们的生存之道如此成功  以至于唯一的
They're so successful, that their only serious competition

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天敌就是他们的同类
comes from others of their own kind,

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而这座岛上有约两千只巨蜥
And there are some 2,000 of them here.

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然而这只巨蜥  并不是在寻找食物
This giant however, isn't looking for food.

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他在寻找配偶
he's looking for a mate.

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雌性巨蜥一年发一次情
Female dragons come into season only once a year.

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这一只并不排斥
She's receptive.

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目前为止  一切顺利
So far, so good.

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但他误入别人的领地
But he's strayed into someone else's patch.

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另一只雄性巨蜥认为它才是这里的王
Another huge male thinks he is the king here.

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岛屿上空间有限  巨蜥的地盘时常重叠
Space being limited on islands, dragon territories overlap,

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导致冲突不断
and that creates continual conflict.

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在巨蜥族群里  体型决定一切
In dragon society, size is everything.

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但如果双方体型相当  鹿死谁手就难以预料
But if rivals are closely matched, the outcome can be uncertain.

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强壮的尾巴一击如同重锤
Muscular tails strike with the power of sledgehammers.

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锯齿形状的牙齿像牛排刀一样锋利
And their serrated teeth are as sharp as steak knives.

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他们都想要掀翻对手
Each tries to topple his opponent.

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胜者出现
Defeated.

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只有最强壮的巨蜥  才有权交配
Only the most powerful dragons win the right to mate.

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岛屿上有限的食物和空间
The limited food and space on small islands

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时常激起激烈的竞争
can often lead to intense competition.

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但有些岛屿却幅员辽阔
But some islands are immense.

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更像是一块小型大陆
More like miniature continents.

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这为不同生命的进化与试验  提供了机会
And these provide opportunities
for life to experiment and evolve.

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马达加斯加是地球上最大的岛屿之一
Madagascar is one of the biggest islands

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也是最古老的岛屿之一
and also one of the oldest,

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它在一亿两千万年前就已经脱离非洲大陆
having split away from Africa over 120 million years ago.

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随着时间流逝与地理隔断的出现
岛上的动物们不断适应
With time and isolation, its animals have adapted

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充分利用一切可用资源
to take advantage of every available niche.

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这座岛上现存约二十五万不同的物种
The island now has some 250,000 different species,

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大部分都是该地区特有种
most found nowhere else on Earth.

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这些不是猴子  而是狐猴
These are not monkeys, but lemurs.

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他们从同一个祖先  进化出一百个不同的种
From a single ancestor,
about a hundred different types have evolved.

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体型最大的马达加斯加大狐猴极少下树
The largest, the indri, seldom comes down from the branches.

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体型小许多的环尾狐猴  成群结队地扫荡森林地面
The much smaller ring-tails
wander in troops across the forest floor

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寻找水果
searching for fruit.

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极小的驯狐猴只吃竹子
And tiny bamboo lemurs eat nothing except bamboo.

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因为竞争者极少
With few competitors,

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狐猴能够在整片岛屿上生活
lemurs have been free to colonise
almost every environment on the island,

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甚至是环境极其恶劣的地方
Even the most extreme.

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这只幼小的冕狐猴成长之路十分艰辛
This baby sifaka has a hard life ahead of it.

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他出生在马达加斯加广阔土地上
He's been born in the most arid and hostile corner

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最贫瘠干旱的地方
of Madagascar's vast landscape.

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他还需要学习很多东西  才能在这存活下去
If he is to survive here, he has much to learn.

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00:15:31,820 --> 00:15:34,280
刺森林的环境类似沙漠
The spiny forest is like a desert.

115
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由于很少下雨  水和食物都很难获取
It rarely rains, so water and food is very hard to find.

116
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在树间跳跃穿梭十分危险
Moving from tree to tree is a perilous business.

117
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这里几乎所有的植物表面都布满尖刺
Here, nearly all the plants are covered with ferocious spines.

118
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幼崽的妈妈在树顶寻找鲜嫩的叶子
His mother searches the tree tops for the youngest leaves.

119
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嫩叶提供了这个家庭唯一的食物和水
They provide the only food and water to sustain the family.

120
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小狐猴三个月大时便开始探索世界
At three months old, the youngster is starting to explore.

121
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很快他将不得不自己上树寻找食物了
All too soon he will have to fend for himself up here.

122
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但总归还是待在妈妈的背上最轻松
But it's altogether easier to stay on mother's back.

123
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如果他能掌握这片森林中特有的生存方法
If he can master the strange ways of this forest

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就能在马达加斯加岛上谋得一席之地
he will have a little corner of Madagascar to himself.

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岛屿生态迫使动物另辟蹊径
Island life encourages animals to do things differently.

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在某些岛上  这是必备的生存技能
And on some islands that is essential.

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00:17:28,200 --> 00:17:30,660
由于火山运动
There are islands still forming today

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00:17:31,610 --> 00:17:33,660
现在仍有岛屿不断形成
built by volcanoes.

129
00:17:37,490 --> 00:17:39,830
有些火山喷发剧烈
Some erupt explosively.

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00:17:46,640 --> 00:17:49,760
有些则熔化岩石
Others pour out rivers of molten rock.

131
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化作岩浆
Lava.

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00:17:58,480 --> 00:18:00,060
在近五十年内
In the last 50 years,

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00:18:00,150 --> 00:18:03,400
已经形成了十个新的火山岛
ten new volcanic islands have been formed.

134
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由于形成时间晚又常十分偏远  鲜有生命踏足
Newly created and often remote,
they're hard for colonists to reach.

135
00:18:40,730 --> 00:18:45,110
即使有  环境也极其难以生存
Even those that do find these are tough places to survive.

136
00:18:51,080 --> 00:18:53,290
这是费尔南迪纳岛
This is Fernandina,

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00:18:53,370 --> 00:18:55,920
太平洋加拉帕戈斯群岛的一部分
one of the Galapagos Islands in the Pacific.

138
00:18:58,420 --> 00:19:03,550
这座年轻的活火山岛屿一片荒凉
Young and still volcanically active, it's a desolate place.

139
00:19:18,070 --> 00:19:22,490
然而环岛的海中却孕育着丰富的生命
The surrounding sea, however, is particularly rich with life.

140
00:19:26,830 --> 00:19:30,540
而这两个不同世界的交界处
And the frontier between these two very different worlds

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00:19:30,620 --> 00:19:34,080
生活着最奇异的爬行动物
is the home of one of the strangest of reptiles.

142
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海鬣蜥
Seagoing iguanas.

143
00:19:43,880 --> 00:19:45,760
它们是素食者
They are vegetarians,

144
00:19:45,850 --> 00:19:48,440
但由于岛上没有能吃的食物
but since there's little food for them on the land,

145
00:19:48,520 --> 00:19:51,730
所以海鬣蜥以海底的植物为食
marine iguanas graze on the sea floor.

146
00:19:56,070 --> 00:19:59,490
这种体型的雄性海鬣蜥可潜到水下三十米
A big male like this one can dive to 30 metres

147
00:19:59,570 --> 00:20:01,860
屏住呼吸长达半小时
and hold his breath for half an hour.

148
00:20:28,940 --> 00:20:33,940
仅在费尔南迪纳岛上  就有超过七千只海鬣蜥
There are more than 7,000 individuals on Fernandina alone.

149
00:20:42,280 --> 00:20:45,280
它们往返近海获取食物养活自己
And by bringing nutrients from the sea to the land,

150
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同时还帮助了其它动物在此生存
the iguanas help other animals to survive here, too.

151
00:20:52,920 --> 00:20:56,340
红石蟹以海鬣蜥背上的死皮为食
Crabs feed on dead skin on the iguana's back

152
00:20:56,430 --> 00:21:00,680
反过来也热情地为它们提供去角质服务
and, in turn, provide a welcome exfoliation service.

153
00:21:08,940 --> 00:21:12,860
小型蜥蜴还捕食纠缠海鬣蜥的苍蝇
While smaller lizards prey on the flies that pester the colony.

154
00:21:36,220 --> 00:21:40,930
但岛上的生存关系并不是都如此和谐
But not all the relationships on this island are so harmonious.

155
00:21:47,770 --> 00:21:50,770
海鬣蜥将蛋下在沙子里
Marine iguanas lay their eggs in sand.

156
00:21:53,200 --> 00:21:57,330
每到六月  刚破壳的小鬣蜥异常脆弱
In June, when the hatchlings emerge, they are vulnerable.

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00:22:01,580 --> 00:22:05,040
它们必须到海边与成年海鬣蜥汇合
They must join the adults at the edge of the sea.

158
00:22:05,130 --> 00:22:07,630
但这将是一次危险的旅程
But the journey will be a dangerous one.

159
00:22:33,910 --> 00:22:35,490
游蛇
Racer snakes.

160
00:23:06,360 --> 00:23:08,650
游蛇错失了这次机会
The snakes miss their chance.

161
00:23:17,200 --> 00:23:19,450
但还有更多的小鬣蜥将孵化而出
But more babies are hatching.

162
00:23:25,220 --> 00:23:29,180
这些游蛇正虎视眈眈
And now the snakes are on the alert.

163
00:23:29,260 --> 00:23:33,850
这是它们一年里最佳的捕食时机
This is the best feeding opportunity they will get all year.

164
00:23:49,990 --> 00:23:54,860
小鬣蜥在平地上跑得比游蛇快
On flat ground, a baby iguana can outrun a racer snake.

165
00:23:56,460 --> 00:23:58,750
但周围还有其他蛇在埋伏
But others are waiting in ambush.

166
00:24:27,700 --> 00:24:32,790
另一只刚孵化的小鬣蜥  第一次见识了这个危险的世界
Another hatchling has its first glimpse of a dangerous world.

167
00:25:32,690 --> 00:25:37,900
蛇的视力并不是很好  但它们可以感知到移动物体
A snake's eyes aren't very good, but they can detect movement.

168
00:25:40,030 --> 00:25:44,410
所以如果这只小鬣蜥能保持冷静
也许能逃出它们的视线
So if the hatch ling keeps its nerve,
it may just avoid detection.

169
00:27:20,430 --> 00:27:22,800
近乎奇迹地逃出生天
A near miraculous escape.

170
00:27:29,890 --> 00:27:34,230
有幸活下来的小鬣蜥可以开始学习
The lucky survivors can begin learning the unique way of life

171
00:27:34,320 --> 00:27:36,990
应对这座危险岛屿的独特方式了
demanded by this hostile island.

172
00:27:45,750 --> 00:27:49,420
尽管海鬣蜥是游泳的行家
Although marine iguanas are expert swimmers,

173
00:27:49,500 --> 00:27:51,800
它们也无法横渡广阔的大海
they can't cross open oceans.

174
00:28:00,760 --> 00:28:05,600
但再汹涌的海水都无法阻挡鸟类
But even the stormiest waters are no barrier for birds.

175
00:28:15,490 --> 00:28:18,580
阵阵烈风加之低温
Gale force winds and cold temperatures

176
00:28:18,660 --> 00:28:21,950
让新西兰亚南极地区的这座岛屿
make the subantarctic islands off New Zealand

177
00:28:22,040 --> 00:28:25,040
在冬天变得尤其不友好
particularly unwelcoming in winter.

178
00:28:38,180 --> 00:28:44,230
但当短暂的夏日来临时  这里将变得风和日丽
But when the brief summer comes,
temperatures rise and winds slacken.

179
00:29:00,040 --> 00:29:03,410
正是游客到访的好时节
It's now that visitors arrive.

180
00:29:06,260 --> 00:29:10,140
都趁着冬天来临之前来这里繁殖
All here to breed before winter returns.

181
00:29:12,640 --> 00:29:14,510
这些是斯岛黄眉企鹅
There's the Snares penguins.

182
00:29:23,310 --> 00:29:25,270
海鸥也来到这里
Shearwaters come, too.

183
00:29:28,320 --> 00:29:32,280
因为没有天敌能够靠近这里
This is an excellent place for them to dig their nesting burrows,

184
00:29:32,360 --> 00:29:35,070
这里成为海鸥挖掘地窝的绝佳场所
for no predators have managed to get here.

185
00:29:41,380 --> 00:29:44,960
很快岛上会到处都是鸟
Soon the island is crowded with birds.

186
00:29:46,550 --> 00:29:50,680
每只鸟都急切地想充分利用  他们短暂的繁育季节
Every one of them eager to make
the most of the short breeding season.

187
00:29:54,930 --> 00:29:57,810
但并不是所有鸟都有伴侣
But not everyone has a partner.

188
00:30:04,360 --> 00:30:08,020
一只雄性新西兰信天翁正等待另一半的到来
A male Buller's albatross waits for his mate.

189
00:30:11,200 --> 00:30:16,080
每年他们都将分开六个月  各自在海上飞行
Each year they spend six months apart, travelling the ocean.

190
00:30:21,250 --> 00:30:24,010
他们将在这里汇合生育下一代
They reunite here to breed.

191
00:30:27,050 --> 00:30:29,510
但今年  雌性信天翁还没有到
But this year, she's late.

192
00:30:33,260 --> 00:30:35,350
不  那不是她
No, that's not her.

193
00:30:39,900 --> 00:30:42,280
其他鸟儿来来往往
The other birds come and go.

194
00:30:52,660 --> 00:30:54,460
时间所剩无几
The clock is ticking.

195
00:30:55,790 --> 00:31:00,830
如果雌性信天翁还不出现
他们将错过顺利繁衍后代的机会
If she doesn't appear soon,
it will be too late for them to breed successfully.

196
00:31:03,670 --> 00:31:08,090
每天清晨海鸥飞离这里  为他们的孩子寻找食物
Every morning the shearwaters
fly off to collect food for their young.

197
00:31:26,740 --> 00:31:29,990
每只鸟儿似乎都在抓紧干
Everybody else seems to be getting on with it.

198
00:31:42,970 --> 00:31:47,680
海鸥的归来意味着又一天过去了
The shearwaters' return marks another lost day.

199
00:31:49,810 --> 00:31:52,810
这个岛上有三百万只鸟
There are three million birds on the island,

200
00:31:52,900 --> 00:31:55,360
但他只在乎那一只
but only one matters to him.

201
00:32:03,700 --> 00:32:04,900
这会是她吗
Could this be her?

202
00:32:11,380 --> 00:32:12,550
总算回来啦
At last.

203
00:32:27,720 --> 00:32:30,180
一开始雄性信天翁还有些害羞
At first, he's a little coy.

204
00:32:45,000 --> 00:32:46,710
但很快就放开了
But not for long.

205
00:32:54,050 --> 00:32:56,710
他们用多年来练成的独特舞蹈
They greet each other with the special dance

206
00:32:56,800 --> 00:32:59,630
向彼此表示问候
they've perfected over many years.

207
00:33:11,240 --> 00:33:17,030
如果他们还打算在冬天来临前养育孩子
要做的事情还有很多
There is much to do,
if they're to raise a chick before winter returns.

208
00:33:21,870 --> 00:33:24,700
但当你和某人分开大半年
But when you have been apart for six months,

209
00:33:24,790 --> 00:33:27,210
有些事需要慢慢来
some things can't be rushed.

210
00:33:46,690 --> 00:33:53,150
地处温暖热带海域的岛屿  无法体验极端的季节变化
Islands in warm tropical
waters don't experience seasonal extremes.

211
00:33:56,240 --> 00:33:59,490
位于非洲东海岸的塞舌尔群岛
The Seychelles, lying off the coast of East Africa,

212
00:33:59,580 --> 00:34:02,790
是海鸟们全年的庇护天堂
provide a sanctuary for sea birds all the year round.

213
00:34:20,100 --> 00:34:22,770
塞舌尔白燕鸥是这里的永久居民
Fairy Terns are permanent residents.

214
00:34:24,350 --> 00:34:29,690
它们筑巢并不讲究
They take a fairly relaxed view about what constitutes a nest.

215
00:34:31,110 --> 00:34:33,530
一根光秃秃的树枝就足够了
A bare branch is quite enough.

216
00:34:42,620 --> 00:34:47,710
不过爬上去孵蛋需要格外小心
Climbing onto it to incubate has to be done with care.

217
00:34:56,430 --> 00:34:59,220
每年白燕鸥都会来一次
Once a year, the noddies arrive.

218
00:35:00,850 --> 00:35:04,020
它们老实筑窝  腺果藤树能让
They do make nests, and Pisonia trees

219
00:35:04,100 --> 00:35:08,320
小鸟的幼年过得安全一些
provide their young with a rather less precarious start in life.

220
00:35:15,540 --> 00:35:18,250
在这个岛上筑巢看起来几乎完美
Nesting on this island looks idyllic.

221
00:35:19,670 --> 00:35:24,000
但美丽的表象后也有危险的一面
But behind the beauty, there's a sinister side.

222
00:35:28,510 --> 00:35:33,800
塞舌尔福迪雀偷袭了无人照看的蛋
The Seychelles fody makes quick work of an unattended egg.

223
00:35:49,530 --> 00:35:51,490
她知道事情有点不太对劲
She knows something's not quite right,

224
00:35:51,580 --> 00:35:55,160
但她孵化的意愿很强烈
but her drive to incubate is strong.

225
00:36:10,340 --> 00:36:12,640
黑燕鸥也遇上了麻烦
The noddies too have a problem.

226
00:36:16,730 --> 00:36:18,610
随着雏鸟一天天长大
As their chicks grow,

227
00:36:18,690 --> 00:36:22,860
腺果藤树长出了黏黏的
so the pisonia trees develop seeds that are sticky

228
00:36:22,950 --> 00:36:24,650
带有倒钩的种子
and equipped with hooks.

229
00:36:30,280 --> 00:36:32,540
新一代黑燕鸥离巢的时候
By the time the young noddies leave,

230
00:36:32,620 --> 00:36:36,870
会带着这些搭顺风车的种子前往其它岛屿
they carry these hitchhiking seeds away to other islands.

231
00:36:43,710 --> 00:36:48,130
但有时腺果藤树的策略过于成功
But sometimes the pisonia trees are too successful.

232
00:36:53,940 --> 00:36:57,900
如果幼鸟在学习飞翔时跌落地面
If a fledgling, testing out its wings, drops to the ground,

233
00:36:57,980 --> 00:37:00,780
它身上会挂满这些种子
it can get covered with the seeds.

234
00:37:09,530 --> 00:37:11,910
汁液粘腻  越粘越重
Entangled and weighed down,

235
00:37:12,580 --> 00:37:16,370
如果它摆脱不了  就会饿死
if it can't free itself,the youngster will starve.

236
00:37:30,390 --> 00:37:35,480
这样腺果藤的种子无法传播
The Pisonia may have failed to disperse these seeds,

237
00:37:35,940 --> 00:37:40,520
但种子扎根很快就有好肥料了
but it will soon have fertiliser for its roots.

238
00:37:46,570 --> 00:37:52,660
这也是人们称腺果藤树为“捕鸟树”的原因
This is why some people call the pisonia the "Bird catcher tree".

239
00:38:27,120 --> 00:38:30,210
白燕鸥又下了一颗蛋
The fairy tern laid another egg,

240
00:38:30,290 --> 00:38:33,340
现在她要养一只小鸟了
and now she has a tiny chick to feed.

241
00:38:40,260 --> 00:38:41,800
这只小鸟很幸运
This chick is lucky.

242
00:38:44,720 --> 00:38:48,850
等它羽翼丰满之时  腺果藤树种子已经传播完毕
By the time it fledges, the Pisonia seeds will have dispersed

243
00:38:48,930 --> 00:38:51,430
它们带来的危险也将不复存在
and the danger they brought will be gone.

244
00:39:03,120 --> 00:39:06,370
再诗情画意的岛屿
Even the most idyllic looking of islands

245
00:39:06,460 --> 00:39:10,290
岛上的动物也要面临挑战
presents challenges for the animals living there.

246
00:39:10,380 --> 00:39:14,630
但它们眼前的最大威胁已经改变
But the greatest threat they face is change.

247
00:39:31,610 --> 00:39:34,440
这是印度洋上的圣诞岛
Christmas Island in the Indian Ocean.

248
00:39:35,950 --> 00:39:41,990
数百万年以来  这块遥远的陆地一直被蟹类统治着
For millions of years this remote
spec of land has been ruled by crabs.

249
00:39:48,330 --> 00:39:51,420
它们的祖先来自海洋
Their ancestors came from the sea,

250
00:39:51,500 --> 00:39:55,750
但绝大多数品种现在已经适应了陆地上的生活
but most have now adopted a land-based existence.

251
00:40:05,230 --> 00:40:09,730
鉴于它们的数量众多  彼此之间还算相对和谐
Given there are so many of them,
they get along relatively harmoniously.

252
00:40:12,400 --> 00:40:18,450
它们是这个小小蟹类乌托邦的园丁和守卫
They're the gardeners and caretakers of a tiny crab utopia.

253
00:40:22,280 --> 00:40:26,080
每年它们都会回到海洋中进行繁殖
Once a year, they must all return to the sea to breed,

254
00:40:26,170 --> 00:40:28,470
而红蟹大迁徙
and the march of the red crabs

255
00:40:28,550 --> 00:40:32,590
是地球是最伟大的自然奇观之一
is one of the greatest natural spectacles on earth.

256
00:40:44,600 --> 00:40:47,060
迁徙的红蟹数量多达五千万只
There are 50 million of them.

257
00:40:54,190 --> 00:40:58,860
这一景象让这座岛屿举世闻名
It's an event that has brought the island worldwide fame.

258
00:41:09,920 --> 00:41:11,680
但近些年来
But in recent years,

259
00:41:11,760 --> 00:41:15,970
数以百万的红蟹未能成功抵达海洋
millions of red crabs haven't managed to reach the sea.

260
00:41:22,140 --> 00:41:25,270
一种入侵物种占领了这座岛屿
An invader has occupied this island.

261
00:41:28,410 --> 00:41:30,620
黄疯蚁
Yellow crazy ants.

262
00:41:31,740 --> 00:41:35,080
它们搭乘来访的船只来到岛上  由于缺乏天敌控制
They escape from visiting ships, and with no predators

263
00:41:35,160 --> 00:41:37,910
它们在森林里建立了
to control them, they have now created vast

264
00:41:38,000 --> 00:41:40,500
巨大的超级蚁群
super colonies in the forest.

265
00:41:46,670 --> 00:41:49,840
当迁徙的红蟹经过它们的领地时
When migrating red crabs march into their territory,

266
00:41:49,920 --> 00:41:51,510
黄疯蚁便展开攻击
the ants attack.

267
00:41:53,220 --> 00:41:57,140
它们朝红蟹的双眼和嘴中喷射酸液
Squirting acid into the crabs' eyes and mouths.

268
00:42:07,450 --> 00:42:09,740
红蟹毫无还手之力
The crabs have no defence.

269
00:42:13,740 --> 00:42:18,000
双目失明  迷失方向  它们便死定了
Blinded and confused, they're doomed.

270
00:42:29,810 --> 00:42:33,350
是人类把这些蚂蚁入侵者带上了岛
Humans brought these ant invaders here,

271
00:42:33,440 --> 00:42:36,440
而现在人类不得不采取措施控制局面
and now humans are having to control them.

272
00:42:40,110 --> 00:42:45,940
与世隔绝的动物群落
可能在数百万年内演化出了相对稳定的生态
Isolated communities may evolve
for millions of years in relative peace,

273
00:42:47,450 --> 00:42:51,990
但当新挑战来袭  它们只能尽力去应对
But, when new challenges arrive, they can struggle to cope.

274
00:42:54,490 --> 00:42:59,200
近年来濒于灭绝的物种之中
Of all the species that have become extinct in recent years,

275
00:42:59,300 --> 00:43:02,840
大约百分之八十是岛屿物种
around 80% have been islanders.

276
00:43:06,600 --> 00:43:11,600
人类对地球所造成的影响  比以往任何时候都要深远
Our impact on the Earth is greater today than ever before.

277
00:43:12,680 --> 00:43:15,100
然而有些岛屿是如此偏远
Yet some islands are so remote

278
00:43:15,190 --> 00:43:18,360
以至于几乎没有人类踏足
that few humans have even set foot on them.

279
00:43:21,820 --> 00:43:24,650
扎沃多夫斯基岛就是一例
Zavodovski Island is one.

280
00:43:28,410 --> 00:43:31,280
它地处南太平洋
It lies in the great Southern Ocean.

281
00:43:31,380 --> 00:43:34,790
不仅被最猛烈的海洋风暴所环绕
It's not only surrounded by the stormiest of seas,

282
00:43:34,880 --> 00:43:37,880
而且本身就是座活火山
it is itself an active volcano.

283
00:43:40,590 --> 00:43:44,180
这里是地球上你最不愿居住的地方
It's the last place on Earth you would choose to live.

284
00:43:53,600 --> 00:43:56,690
除非你是一只南极帽带企鹅
Unless you're a chinstrap penguin.

285
00:43:59,310 --> 00:44:02,780
这里的水域食物充足  但若想享用美食
There is plenty of food in these waters, but to exploit it,

286
00:44:02,870 --> 00:44:05,580
这些企鹅得冒着生命危险
the penguins have to risk their lives.

287
00:44:56,380 --> 00:45:00,300
这里的生活险象环生
Life here is dangerous in the extreme.

288
00:45:18,110 --> 00:45:21,780
但生活在火山上还是有一些好处的
But there are some benefits from living on a volcano.

289
00:45:24,370 --> 00:45:27,870
火山的热量每年早早地融化了积雪
Its warmth melts the snow early in the year.

290
00:45:28,790 --> 00:45:32,290
到了一月  南极地区的仲夏时节
And, by January, the Antarctic's mid-summer,

291
00:45:32,370 --> 00:45:34,920
整座岛被小企鹅覆盖
the island is covered in chicks.

292
00:45:39,430 --> 00:45:42,640
双亲轮流守护幼崽
Parents take turns at guarding them

293
00:45:42,730 --> 00:45:45,100
直到它们成长到足以独立生活
until they're large enough to be left alone.

294
00:45:50,190 --> 00:45:55,360
这几只小鸟饿了  但母亲没有食物可以喂它们
This mother's chicks are hungry,
but she has no food left to give them.

295
00:45:57,320 --> 00:46:01,610
生存与否取决于它们的父亲  能否带着食物归来
Their survival depends on their
father returning with their next meal.

296
00:46:06,170 --> 00:46:07,960
有些企鹅确实一去不返
But some don't make it.

297
00:46:22,680 --> 00:46:26,770
贼鸥不断侵扰着企鹅种群  希望能趁机叼走一只雏鸟
Skuas harass the colony hoping to snatch a chick.

298
00:46:34,980 --> 00:46:36,940
母亲不能冒险离开自己的雏鸟
She can't risk leaving them.

299
00:46:42,000 --> 00:46:46,090
只要父亲尽快回来  情况就会好转
Everything will be fine,
as long as their father comes back soon.

300
00:47:16,700 --> 00:47:20,000
他前往远离海岸八十公里的海域捕鱼
He's been fishing 50 miles offshore,

301
00:47:20,080 --> 00:47:22,170
但他现在离家不远了
but now he's not far away.

302
00:47:25,000 --> 00:47:28,550
对于他和这里所有的企鹅父母来说
For him, however, and for all the other parents here,

303
00:47:28,630 --> 00:47:31,380
归途中最糟糕的一段还在后面
the worst of the journey is still to come.

304
00:48:04,630 --> 00:48:09,300
他的小脚爪帮助他攀附住陡峭的火山岩
Tiny claws help him to get
whatever grip he can on the rough lava.

305
00:48:38,250 --> 00:48:41,330
对于这些往返的企鹅来说  现在是高峰时刻
For these commuters, it's rush hour.

306
00:48:42,970 --> 00:48:45,840
有些企鹅今天不太顺利
Some have had a really bad day.

307
00:48:50,260 --> 00:48:54,560
这位父亲要走三公里的路才能到家
The father now has a two-mile walk to the nest,

308
00:48:54,640 --> 00:48:57,270
肚里塞满食物  路越发难走
and a stomach loaded with food doesn't help.

309
00:49:04,650 --> 00:49:08,690
周围还有全球数量最庞大的企鹅种群
This is the largest penguin colony in the world.

310
00:49:15,790 --> 00:49:19,300
但由于他每隔一天就要走一遍
But as he makes the same journey every other day,

311
00:49:19,380 --> 00:49:22,510
闭着眼睛都能找到回巢的路
he should be able to do it with his eyes closed.

312
00:49:31,430 --> 00:49:34,680
巨大的种群数量确实能保证安全
It's true that there can be safety in numbers,,

313
00:49:34,770 --> 00:49:37,480
但当你试图寻找自己的巢穴之时
but numbers can also be something of a problem

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00:49:37,560 --> 00:49:39,810
这也会成为问题
when you're trying to find your own nest.

315
00:49:46,660 --> 00:49:48,620
母亲依然在等待
The mother is still waiting.

316
00:49:50,830 --> 00:49:53,000
小鸟们快要绝望了
Her chicks are now desperate.

317
00:49:59,090 --> 00:50:01,800
在这震耳欲聋的叫声之中
In the midst of all this deafening chorus,

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00:50:01,880 --> 00:50:04,470
他可以辨识出对方特有的声音
he can recognise her particular cry.

319
00:50:24,910 --> 00:50:26,080
总算回来了
At last.

320
00:50:42,210 --> 00:50:44,380
两只雏鸟都能饱餐一顿
Both chicks will get a meal.

321
00:50:51,940 --> 00:50:56,780
点头示意之后  他们的母亲出发了
With a head bob of acknowledgement, their mother now leaves.

322
00:50:56,860 --> 00:51:00,200
轮到她外出捕食了
It's her turn to do the feeding run.

323
00:51:06,870 --> 00:51:13,330
这种艰难的往返  是这些企鹅为了庇护所付出的代价
This formidable commute is
the price these penguins pay for sanctuary.

324
00:51:19,930 --> 00:51:23,520
也许在我们看来  这样的天堂很奇怪
A strange vision of paradise to us, perhaps,

325
00:51:23,600 --> 00:51:27,140
但是对于一百五十万只企鹅来说
but, for one and a half million penguins,

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00:51:27,230 --> 00:51:29,440
这座岛屿满足了全部所需
this island has it all.

327
00:51:40,660 --> 00:51:44,740
岛屿可能既偏远而又微不足道
Islands may seem remote and insignificant,

328
00:51:44,840 --> 00:51:49,170
但它们仍是地球上某些珍贵动物的家园
but they are home to some of the most precious wildlife on Earth.

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00:52:04,490 --> 00:52:05,610
下一集
Next time,

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00:52:05,830 --> 00:52:08,750
我们会到地球的高山
we ascend into the planet's high mountains

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00:52:10,000 --> 00:52:14,240
发现一个壮观但充满敌意的世界
to discover a spectacular but hostile word.

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00:52:14,550 --> 00:52:17,350
生活在那儿必须足智多谋
where life must be at its most resourceful,

333
00:52:19,020 --> 00:52:21,580
只有生命力最顽强的动物可以忍受
and only the toughest animals can endure.