蓝色星球双语台词对白剧本

There is a force sufficiently powerful to move the oceans of this world

地球上有一种力量大到足以搬动海洋

lt is a force, not of this earth

这种力量不存在地球上

The moon is large enough to generate gravity

月球大到足以造成地心引力

and with sufficient force to pull on the earth,

足以从三万两百里远的地方

two hundred and thirty thousand miles away

牵动着地球

As the moon orbits the earth its gravity sweeps across the face of our planet

当月球绕地球运行时她的引力横扫过我们星球的表面

lts power drags a great bulge of oceanic water in its wake

她的力量增强时能使海水剧烈隆起

- the rising tide

也就是涨潮

The River Amazon in Brazil

巴西的亚马逊河

On some special days the gravitational forces

在特定时节中月球与太阳

of the moon and the sun pull together - to extraordinary effect

的地吸引力同时作用造成异常强大的影响

A growing tidal wave from the ocean is being forced two hundred miles inland

成形中的潮浪被推向内陆200里

This is a tidal bore

这是海啸

Fortunately tidal bores are rare,

幸运的是海啸并不常见

but the moon does create strong tides out in the world's oceans,

但月球的确在地球的海洋上造成强大的潮流

on every day of the year

日复一日到年复一年

The Bay of Fundy, in Nova Scotia

新斯科细亚省芬地湾

The tides here are the largest in the world

这里的潮浪是世上最强的

and have a profound effect on marine life, creating a rich feeding ground

对海洋生物造成显著的影响制造了一个富足的聚食场

A feast that attracts some of the largest diners on the planet

这个盛宴吸引了一些地球上体积最大的食客

Humpback whales

座头鲸

But they are not the biggest threat to the herring

但它们并不是鲱鱼最大的威胁

These are finback whales

这些是脊鳍鲸

At seventy tonnes - the second largest animal on earth,

重70吨是世上第二大动物

but so beautifully streamlined that it is the fastest of the great whales

但完美的流线体型使它成为速度最快的鲸鱼

This combination of speed and immense size

速度与庞大体积的结合

makes the finback a voracious hunter of schooling fish

使脊鳍鲸成为凶恶的鱼群猎手

The Bay of Fundy can attract so many fish, that during the summer,

芬地湾能吸引为数众多的鱼群夏季时

as many as five hundred of these magnificent whales hunt here every day

每天有500只壮观的鲸鱼在此觅食

The feeding is best where the tides run strongly

而浪潮汹涌的地方最利于觅食

So the whales move further into the bay,

所以鲸群向海湾前进

following tidal rips and searching for fish

跟随着潮浪寻找鱼群

Their movements are closely watched by flocks of Cory Shearwaters

它们的行动都在水剃鸟的监视中

As the whales dive down toward the fish

只要鲸鱼朝鱼群潜入

- more and more birds gather, anxious to pick up scraps

越来越多的鸟就会聚集迫切地想分点食物

The flowing tide may provide a feast for the whales,

流动的潮浪也许能为鲸群带来飨宴

but before long it will turn

但它很快地就会转向

ln just six hours, one hundred billion tonnes of water

短短6小时内上千亿吨的水

will flow out of the bay

就会流出海湾

The sea level falling by as much as 1 5 metres

海水位会降低15公尺之多

and exposing vast tracts of mud... and sand

留下大片的泥沙

At first sight a barren place, entirely devoid of life

乍看像是块脊地没有任何生命迹象

ln fact, the damp sand is packed with microscopic life

事实上潮湿的沙里充满微小生物

- the meiofauna, feeding in a sandy underworld,

在沙底世界觅食的底下动物

quite unaffected by the departure of the sea

完全不受退潮的影响

But life is not all roses in this miniature world

但这小世界里的生命并非完全美好

A sand bubbler crab - in Northern Australia - it hunts meiofauna

一只北奥洲的喷沙蟹它捕食底下动物

Just a centimetre across, the sand bubbler works at breakneck speed,

只有几公分宽的喷沙蟹动作十分快速

passing sand grains into its mouth,

将沙砾塞进嘴里

filtering out all the meiofauna and kicking aside the waste

过滤出所有的底下动物并将垃圾踢到一旁

The crab will clean every grain of sand within a metre of its burrow

它们会将自己洞穴周围 1公尺的沙全部清干

Endless practise for the best back heel in the Natural World

持续的练习使它们的倒退技术堪称全自然界之冠

The crabs work fast because they can only sieve when the sand is damp

它们的动作迅速因为它们只能过滤潮湿的沙

Remarkably, they work the entire surface of the beach

令人称奇的是它们能在几小时内

within just a couple of hours of the tide retreating

趁着退潮时过滤沙滩上所有的沙

Then they simply return to their burrows and await the next tide

接着它们便退回洞穴静待下一次涨潮

Underwater a falling tide is the cue for some bizarre activity

在水中下降的浪潮暗示着某些奇特活动的开始

These slow moving clams use their muscular feet

这些动作缓慢的蛤蜊用有力的脚

to bury themselves under the sand

将自己埋到沙里

lf they fail to get under cover,

如果它们不找到掩护

the tide will leave them exposed to the air and they will perish

潮水会使它们暴露在空气中它们便会死去

But once underground they can wait deep down in the sand,

但只要在地底下它们就能深深躲进沙里

safe beneath the beach

安全地留在海滩下

And not a moment too soon

而且时机恰好

June in Southeast Alaska and in just four hours

东南阿拉斯加的六月短短4小时内

a vast sandy beach is exposed by the falling tide

一个广阔的沙滩因退潮而显露

The bears are hungry - at this time of year

熊群肚子饿了在这时节里

the pickings on land are few and far between

它们很少在陆地上觅食

But any food here has long since buried itself deep under the sand

这里的食物大概都早就被深埋在沙中

To a hungry adult bear that is no barrier

对一只饥饿的成年熊而言并无所谓

- they smell the clams through the sand and simply dig them out

它们能闻到沙中的蛤蜊轻而易举地将它们挖出

For such large animals, they show quite extraordinary dexterity

以体型硕大的动物来说它们打开这些不幸的蚌类时

at opening the unfortunate shellfish

展现出惊人的灵敏度

Cubs try their luck, too, none too successfully!

小熊也想试试但并不太成功

But for the adults the shellfish feast lasts as long as the tide remains out

而成年熊群的蚌类大餐却可持续整个退潮期

Table Mountain in South Africa

这里是位于南非的桌山

Every day the retreating waves leave flotsam somewhere on the beach...

每天退潮都会在海滩某处留下漂浮物

...and this creature is scenting the currents for the odour of rotting fish

这只动物正从水流中闻出腐烂鱼肉的味道

The tide carries the scent far into the surf zone

潮汐将气味带入碎浪区

Responding to the smell, snails emerge from the sand

闻到气味的海螺从沙中出现

This is a race against the tide - the snails need to find their meal

这是与潮水的竞赛海螺必须在潮水

before the tide leaves it beyond their reach

将食物带走前找到它们

But snails are slow and the tides fall rapidly

但海螺动作慢而退潮速度快

These, however, are no ordinary snails

然而这些并非一般的螺

They can surf!

它们会冲浪

They ride the waves up the beach but all too soon

它们乘着海浪到达海滩但潮水

the tide leaves the fish beyond the surf zone

即刻将鱼留在碎浪区外

Without the sea there's a danger that the snails will lose the scent,

没有海水蜗牛就有闻不到气味的危险

but as long as the sand remains damp they can still follow a faint trail to the food

但只要沙滩维持潮湿它们就可以循着微弱的气味找到食物

Once there they tuck in with macabre relish

一旦发现它们便能大快朵颐

Good things come to those who wait!

等待终于还是值得

Before long the heat of the sun forces them

不久后阳光的热度

to retreat into the sand to await the return of the next tide

迫使它们退回沙中等待下一个潮汐的归来

February in Britain

英国的二月

The falling tide is eagerly awaited by these knot

这些鸟迫切地等待着退潮

As the water retreats countless small invertebrates

退潮时无数的无脊椎动物

are seeking shelter under the mud

在泥中找寻庇护

And with good reason

而这是情有可原的

Waders are specialists at probing in the mud,

涉水鸟是在泥中探索的专家

their wide variety of beak shapes designed

它们的各式嘴形

for reaching different invertebrate dinners

是为撷取不同无脊椎动物而设计

Keys that unlock the safety of the tidal flats

也是解开潮汐区浅滩所提供的保护的关键

But within a few hours the tide will turn again

但几小时内潮汐又会转向

Soon the waders are out of their depth

很快地涉水鸟远离了这里

and the creatures of the mud are safe once more

泥中的生物也再次安全了

Underwater incoming tides can create a strong current

前进的潮水能在水底造成强烈的水流

And flounder are experts at hitching a tidal lift

而比目鱼是搭潮浪便车的专家

They are shaped rather like a kite - a perfect design for gliding on the tide

它们的形状近似风筝如此设计很适合在潮水上滑行

ln Newfoundland on the East Coast of Canada,

在加拿大东岸的纽芬兰

large numbers of flounder ride the currents up into the shallows

众多的比目鱼乘着潮浪流上浅滩

They have come to hunt invertebrates that will emerge now that the water is back

它们来此捕食水退后出现的无脊椎动物

The pickings in the shallows can be very good

在浅滩上觅食的收获颇丰

The activity has not gone unnoticed

这样的活动十分引人注意

But Ospreys can't dive deeply

但鹗无法潜水太深

As long as the water is more than a meter deep, the found then will be safe

只要水深超过1公尺比目鱼就很安全

Going too far inshore can be a risky business

离海岸太近是项危险的行为

This fish buries itself completely in the sand at any sign of danger

这条鱼只要察觉到任何危险就将自己完全埋在沙中

But when the tide floods in again, as long as the coast is clear

但当潮水再度涌进只要海岸空无一物

- these sand lancet will re-emerge

这些沙中的鱼就会再出现

After a wait of six hours under the sand, they are desperate for food and,

在沙中等待6小时后它们迫切渴望食物

unlike flounder, they head out to sea

不同于比目鱼的是它们向海上出发

They are looking for shallow open water,

它们在找寻浅而宽阔的海水

where the tidal currents will concentrate their food - plankton

那里的潮流会聚集它们的食物也就是浮游生物

ln their untold thousand they stream toward the best feeding grounds

为数庞大的它们游向最好的聚食场

Where they simply pick up tiny planktonic creatures from the water

它们可以轻而易举地从水中找到浮游生物

But, if they swim too far off-shore in search of food,

但若它们为食物而离岸太远

they risk running into large predators that live out in deeper water

它们就有遇上深海中较大掠食者的危险

Dogfish - small sharks

属小型鲨的狗鲨

The sand lancet have strayed out of their safe depth

柳叶鱼离开了它们的安全范围

The effect of the turning tide can be totally different on a rocky shore

转向潮浪的影响对岩岸是完全不同的

Here on the coast of Vancouver lsland in Canada the sun bakes the exposed rock

在加拿大温哥华岛的海岸太阳烘烤着暴露在外的岩石

lt's virtually impossible to dig underground when the sea retreats,

退潮时重新躲回地底是绝不可能的事

so these mussels and barnacles are fully exposed to the heat of the sun

于是这些贻贝及藤壶完全地暴露在烈日下

- literally cooking in their own shells

真的是在自己的壳里被烹煮

And the seaweed simply dry to a crisp

而海草则被晒至又干又脆

lt can be a wait of many hours before the water returns

海水再回来也许要几小时的等待

Throughout each month the size and strength of the tide changes

每个月潮汐的大小及强度不断改变

The biggest tides of all happen

最强的潮汐

when the gravities of the sun and moon pull in unison

发生在太阳和月亮的地吸引力一起作用时

That happens immediately after the new moon...

这发生在新月之后

...and again after the full moon

并再次在满月之后出现

These are called the spring tides

它们称做朔望潮

They reveal vast tracts of sea bed that would normally be covered

会使许多原本被覆盖的海床露出

For these racoons it's a chance to look for a seafood feast

这是浣熊寻找海鲜大餐的好时机

A mother ventures forth with her kits

一个母亲带着幼熊去探险

With the spring tide, they've come further down the beach

朔望潮时它们可以来到岸边

than smaller tides would normally allow

这是小潮期时无法做到的

Searching with their extraordinarily sensitive paws

靠着它们格外灵敏的爪子

- they look for suitable prey

它们找寻适合的食物

With the extreme low tide they could find something special

及低的潮水让它们能找到特别的东西

And what could be better than a red rock crab

还有什么能好过一只红岩蟹

That is, if it weren't for the risk of a painful pinch

这是如果可以不被夹痛的话

With large crabs there's no substitute for experience

要抓到一只大螃蟹还是要靠经验

- the mother makes an expert's catch

这个母亲专业地出击

But the kits learn fast!

但小浣熊也学的很快

And for those that don't - begging is always worth a try!

而学不快的就只好试着乞讨

All too soon the returning tide will cover the racoon's table

很快的浪潮会淹没浣熊们的餐桌

For all the invertebrates it is a welcome relief,

对无脊椎动物来说这是种解脱

but in rough weather they are exposed to the worst of the waves

但在不好的天气里它们会面对最糟的海浪

Even when there are no waves - the incoming tide

即使没有海浪前进的潮水

can create considerable forces underwater

仍会在水下形成相当大的力量

The gaps between these small islands on

温哥华东岸

the East coast of Vancouver lsland channel the tidal flow

这些小岛间的间距形成潮流的航道

As the tide keeps rising, gradually the water flows

当潮水持续上升水流逐渐加快

faster and soon these giant thirty metre

而这些30公尺长的巨藻

long bull kelp plants bend to the current

就会顺势弯曲

They are sufficiently flexible to cope without too much damage,

它们的柔软度足够能不受损害地适应环境

but there are some spots where the currents are especially powerful

但有些地区的水流特别强烈

This is the Nakwakto Rapids

这里是那克瓦多湍流

At the turn of the tide, water from almost seven hundred miles

当潮水转向时从近700里外峡湾而来的水

of coastal fjords will have to empty through a gap

将必须经过一条

of less than half a mile wide

窄过半里的缺口

Within a few minutes the current is already picking up speed,

几分钟内水流已开始加速

until water roars by at over seventeen miles per hour

直到水以每小时17里的速度前进

Tidal currents are not always a damaging force

潮流的力量并不只会带来破坏

- here in the Poor Knight lslands of New Zealand,

例如在纽西兰的普尔奈群岛

weak tides run through rock arches,

微弱的潮流流过海石拱

making an ideal resting place for stingrays

成了魟鱼最佳的栖息地

These rays congregate here in huge numbers every March

每年三月这些魟鱼大量聚集

- they've come to breed

它们是来交配的

The arches funnel the current, which the rays can ride

这些海石拱将潮流汇集让这些魟鱼

with a minimum of effort, so saving energy

可以轻易乘海流而行保存一些体力

Nearby, out in open water, a school of two spotted desmoiselle fish

在附近的开阔水域一群散点光鳃雀鲷

are feeding on plankton and the current

正在吃浮游生物潮流流向

is perfect for sweeping their food past them

正好将食物扫向它们

Once the current starts to weaken,

当潮流转弱时

there is insufficient food to warrant the risks of swimming

食物就会减少也不值得冒险到

about out here in the open

开阔水域觅食

So the desmoiselles head off to find shelter en-masse

所以全体雀鲷掉头另觅住所

Safety is in numbers

安全还是最重要的

More and more desmoiselles pour towards the cave entrances

越来越多的雀鲷朝普尔奈群岛上

that riddle the Poor Knight's islands

蜿蜒的洞穴的入口处游来

Safe at last - inside the cave

在这里较不会暴露在

they are far less exposed to attack from predators

掠食者的攻击之下它们终于安全了

Thousands of desmoiselles and blue mao mao wait for the return of the current,

数千只雀鲷及蓝帽在此等待潮流再度到来

when once again they will head out into the open to feed

它们才能游到开阔水域觅食

The moon's gravitational pull is weaker nearer to the earth's equator,

月球引力在地球赤道附近较弱

so the more equatorial the location, the smaller the tides

所以越接近赤道的地方潮流也就越弱

And out here in the Caribbean Sea the tidal movements are slight

在加勒比海域潮汐只有些微的涨退

Even so, they are sufficient to push free swimming plankton in their path

即使如此潮流的力量还是足以将会活动的浮游生物推向它们的旅程

These are thimble jellyfish

这些是顶针水母

They swim towards the sunlight and invisible boundaries

它们朝阳光游去而潮汐活动所形成的隐形边界

formed by the tidal motion help to herd them together,

则有助于它们的聚集直到它们汇整而成巨大的一群

until they gather in immense swarms

它们很会利用热带的阳光

They put the tropical sunshine to good use

身上的棕色来自

- their brown colour comes from algae that

居住在体内的藻类

live inside the jellyfish's bodies and photosynthesise energy from the sun

藻类会利用日光行光合作用以制造能源

ln open water they are fairly safe,

在宽阔的远洋中它们算是安全的

but the tide is sweeping the whole swarm gently towards the Bahamas,

但是潮流正将这一群水母慢慢带往巴哈马水域

where hungry mouths are waiting

在那里有许多张嘴垂涎着它们

Although the sea level does not change much

虽然海平面高度改变不大

- the tides are still pushing an enormous volume of water

潮流还是将容积庞大的海水

from the ocean through the small gaps between the island cays

从汪洋中推进岛上礁岩的细缝间

Underwater the tidal currents race past soft corals

在海面下这些潮流奔流过软珊瑚

And on over the sandy banks themselves...

层叠翻过沙岸

lt is an immense area of coral sand that is only just submerged at high tide

这是一大片的珊瑚沙滩只有在涨潮时会被淹没

This incoming tide is bringing in a fresh supply of oceanic plankton

这波迎面而来的浪潮将会带来新的浮游生物

and razorfish gather at the best spots to catch the pick of the microscopic feast

而蔷薇虹彩鲷也聚在捕食微生物大餐的最佳位置

Although there is plenty here for these small fish to eat,

虽然食物足够这些小鱼饱餐

gathering in one place makes it easy for their predators to find them

但是群聚在此却也让天敌更容易找上它们

A nurse shark is little threat

猫鲨算不上什么威胁

But this sound heralds a quite different danger

但是这个声音传来的警讯可就不同了

A bottlenose dolphin

是一只瓶鼻海豚

lt's using its sonar to locate razor fish beneath the sand

他正利用声纳系统找出沙里的蔷薇虹彩鲷

Once it finds a suitable target it simply digs out its prey

找到合适的目标后就挖出它的猎物

The buried fish have no defence against this attack

埋在沙中的鱼毫无招架之力

They will simply have to wait and hope they aren't found out

只能等待并希望自己不要被找到

This dolphin appears to have a razor fish craving - well, she is pregnant

这只海豚好像有了虹彩鲷瘾那是因为她怀孕了

Success, at last

最后终于成功了

The incoming tide sweeps on towards America,

这波逼近中的浪扫向美国

flooding across vast flat plains of seagrass

淹过这片广大的水草

They are so shallow that, at low tide,

这里的水极浅所以在退潮时

all large fish are forced to retreat into deep water channels

大型鱼都被迫要避到深水道中

Like these nurse sharks... and these stingrays

就像这只猫鲨还有魟鱼

Both predators hunt crustaceans on the seagrass beds,

两只肉食鱼类都会猎食浅滩上的甲壳类

but until the flooding tide brings enough water for them to swim in,

在水位涨到足以让它们前来觅食前

they will have to wait

它们也只能等待

So for now this tulip snail it appears safe

所以这只郁金香螺可以趁此时安全地

to patrol the shallows in search of a meal

在浅水中来回寻找食物

But is it?

但它确实是安全无虞的吗？

This l s a rather bigger kind of snail

这是一只体型较大的海螺

At five kilogrammes in weight, the giant horse conch

一只重达五公斤的旋螺

has little to fear from any shark... and it has a taste for tulip snail

根本不怕用任何鲨鱼而且它嗜食郁金香螺

Sensing the approaching danger - the snail flees

察觉到危险的逼近海螺逃了

But in a world of snail paces - the conch is something of a Ferrari

但是以海螺世界的速度来说旋螺像是一台法拉利

lt calls for desperate measures

需要使出非常手段了

Exhausted by the effort of its last ditch attempt,

被自己最后一次的遁逃弄得疲累不堪的郁金香螺

the tulip snail is slowly gunned down

眼看就要被猎走了

The tide still has to rise for another hour before the big predators can feed

大型的猎食者要等潮水再涨一个小时才能出动

But out on the flats the scent of dying snail wafts away on the tide

但是在浅滩上垂死海螺的味道四溢也是这些寄居蟹偏爱的味道

lt's a scent that these hermit crabs are particularly partial to

对这些螃蟹来说找到足够的保护可以躲过

lt's vital that the crabs have the best possible protection

一旁等待的鲨鱼及魟的利齿

from the heavy teeth of the waiting sharks and rays

是非常重要的大事

For that they need the shell with a perfect fit

所以它们需要一个大小完全合适的壳

Today there is new real estate on offer

今天有新居待价而沽

- and competition in this housing market is fierce

而房屋市场的竞争也剧烈异常

The action becomes even more desperate

当被吃掉的海螺的壳就要被弃置时

when the shell of the devoured snail is ready for release

它们的动作变得更拼命

This crab simply can't wait any longer

这只寄生蟹不能再等了

But it's a decidedly risky acquisition

但是它所冒的险也是奇大

The risk paid off handsomely - the new shell is both lighter

冒险的代价甚是美好新壳比老家轻

and stronger than the old home and it's not a moment too soon

也坚硬许多时间算得刚好

because the tide is flowing in strongly, flooding the plains

因为此时潮水来得极猛已经淹过这片平原

At last, the predators are free to start their foraging

肉食动物终于可以开始掠食

Both the stingrays and sharks have a highly developed electrical sense

魟鱼和鲨鱼都有高度演化的电流感应器

which they use to search for buried invertebrates

它们用它来找寻埋在沙中的无脊椎动物

- they can sense minute movements beneath the sand

就连沙中最细微的动作也能察觉

Finding a promising signal, this ray digs out its meal,

这只魟鱼有了可靠的讯息挖出它的猎物

an unprotected hermit crab would have no chance

一只毫无保护的寄居蟹只有死路一条

Within a few hours the tide ebbs out once more,

数小时内，又是退潮

and all the predators are forced to leave

所有的掠食者又得被迫离开

They will have to wait until the next high tide

它们须等到下一次涨潮

before making another feeding foray

才能再度出外猎食

At certain times of the year called the equinox,

一年中有个时节称作春分

spring tides are exceptionally large and rise even higher than normal

此时的朔望潮水特别猛卷起的高度比平时要高

Now predators can reach the very shallowest fringes of the seagrass flats

猎食动物也可以游至水滩中最浅的水域

These two metre long tarpon are heading further inshore still

这些长2公尺的大海鲢正朝更里岸游去

They are heading for the mangroves

它们的目标是红树林

These flooded forests cover huge areas of the coastal shallows

这些水中森林广布沿岸浅滩

Extraordinarily, the roots of the mangrove trees

这些惊人的水笔仔

can live in salt water and they make a perfect nursery for small fish

根部可以在咸水中生存也成了小鱼最佳的育婴房

Silversides and snapper find sanctuary in the maze of roots

银鱼与笛鲷在这盘根错节的迷宫中找到庇护

- big predators seldom find a way in here

大型掠食鱼进不了这里

And now the tide is falling once more

又是退潮时候

The water starts losing what little oxygen it contained

水中本就极少的含氧量又开始下降

and quickly becomes stagnant

水又开始浑浊

Most predators have abandoned the mangroves,

大部分的掠食者离弃红树林

but these tarpon are still here trapped by the falling tide

但是这些鲢鱼却因退潮身陷此地

The dissolved oxygen is fast running out,

水中氧气快速减少

but they have a vital survival technique...

但是它们有一个重要求生技巧

...they can breathe air

它们可以在这里呼吸

Pumped up with fresh oxygen they can easily out

体内再度充满氧气的鲢鱼可以轻易

manoeuvre the dozy silversides

战胜闲散的银鱼

The tide has turned again

潮汐再度变换

And this is no ordinary tide

这可不是普通的浪

Since it is the equinox - the tide is rising fast

春分时节，潮浪会快速窜起

but now out to sea a hurricane is on its way, forcing the tide yet higher

但是海中央又有飓风正要来临将潮浪卷起到更高的高度

The passing storm leaves large areas of the coast flooded by the sea...

暴风雨的侵袭让沿岸许多地方都淹水了

...and the low lying islands like the Bahamas

地势较低的岛屿像是巴哈马群岛

are even more prone to storm flooding

更容易因为暴风雨侵袭而淹水

The sun's power here is immense

太阳的力量在这里是很强大的

As the tide recedes and the remaining flood water evaporates

当潮水退去，剩余的水蒸发

- a remarkable transformation takes place...

惊人的改变发生了

The mud is coated with a magical world of salt

泥巴上多了一层神奇的盐世界

Any remaining water is extremely salty - very few creatures can survive here...

剩余的水中，盐的浓度极高没有多少生物可以在此生存

...except these brine shrimp

除了这些丰年虾

And on the water's edge, brine flies

还有水边的咸水苍蝇以外

Both are the favourite food of an extraordinary animal

它们都是一种奇妙的动物最爱吃的食物

The Caribbean Flamingo

它就是加勒比海火鹤

Remarkably, they actually seek out such briny places

特别的是，它们会特意寻找这些咸水区域

- they are the best spots for them to find their food

这里是它们觅食的最佳场所

And they also provide the protection the flamingos need to raise their young

这里也提供了火鹤抚育幼子时所需的保护

Nesting sites like this are surrounded by corrosive brine

这类的筑巢地点被具侵蚀性的咸水包围着

lt's a formidable barrier to any predators seeking to dine on flamingo chicks

对任何想以火鹤幼子为食的掠食者来说，这里是铜墙铁壁

The Flamingo takes the precaution of building next

火鹤在巢的四周小心高筑泥围墙

Just in case of further flatting

以防水患再起

Strangely, it's actually the power of the storm tides

奇异的是火鹤的食物及栖息地

that gives the flamingos both their food

都是暴风雨潮水的

and a perfect habitat in which to breed

力量所带来的

The breeding of many animals in the ocean

海洋中许多动物的繁殖

is closely co-ordinated with the tidal cycles

都与潮汐循环有着密切关系

A half moon in November. lt is the time for small tides.

11月间的弦月是低潮的时期

Christmas lsland in the Pacific

这里是太平洋上的圣诞岛

Strange happenings are afoot

有奇事即将发生

lt is one of only a few nights each year

今晚是一年中少有的夜晚

when female Christmas lsland crabs risk heading down towards the sea

母圣诞岛蟹会在今晚冒着危险走向大海

Around the island they number in tens of thousands

成千上万的蟹群分布在岛周围

and all of them are laden with hundreds of eggs

每只身上都背有数百颗卵

They have to shed them into the ocean if the eggs are to develop into baby crabs

它们要把卵甩到水中卵才能孵化成幼蟹

But these are land crabs and they can neither swim nor breathe underwater

因为它们是陆生蟹，所以不会游泳也无法在水中呼吸

There is a great risk of drowning,

它们有淹死的危险

which is why they pick the smallest tides of the month

所以选在潮汐最弱时行动

- to minimise the danger

好将危险降到最低

The eggs will develop far offshore and in exactly

蟹卵会在离岸较远处生长

one month's time a great swarm of baby crabs will return,

一个月后就会有一大群小蟹回游

again choosing the perfect tide

也是选在潮汐最佳的时机

Whether it's the daily or monthly cycle,

无论是日循环或月循环

tides are the rhythm of the ocean - its pulsing clock

潮汐是大海的节奏是它的节拍器

For every tide brings opportunity to marine life somewhere in the world

每一个潮流都为地球上某处的海洋生物带来生机

Now a spring tide is flooding the shallows and hunters are on the prowl

此时朔望潮将浅摊淹没掠食者来回巡行

A small group of bottlenose dolphin are working their way

一小群瓶鼻海豚正朝海岸上前进

inshore to start a quite extraordinary hunting campaign

准备进行一项十分特别的猎食行动

After one successful pass the dolphin move off to start again

在一次完美的传接后海豚马上准备重新来过

One animal peels off from the group and swims rapidly in a circle,

一只海豚离开团体一圈圈快速游泳来卷起泥巴

stirring up the mud and driving the mullet towards the other waiting dolphins

将乌鱼赶往其他等待中的海豚

lt's a remarkable team effort and it is extremely effective

真是惊人的团队合作而它的效率也一样惊人

The dolphin will feed like this for as long as the tide grants

海豚会在潮水深度仍在它们活动范围的情况下

them access to the shallows

继续以这种方式在浅滩捕食

Eventually the falling tide will force the dolphin to leave the flats

最后，海豚会因退潮而被迫离开

and the mullet will be safe once more - until the next high tide

这片浅滩及乌鱼又是安全的了至少在下次涨潮前是如此

Because in the ocean every turn of the tide spells

在大海里，每回潮汐的来去

the difference between life and death, somewhere

都掌握着生与死的分别

蓝色星球 The Blue Planet 第7集: 潮汐海 Tidal Seas

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