Is this the most valuable thing in the ocean? - David Biello

356,178 views ・ 2024-08-20

TED-Ed


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翻译人员: Jinghan Zhang 校对人员: suya f.
00:07
In 1891, newspapers reported the story of James Bartley,
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1891 年,报纸报道了 詹姆斯·巴特利的故事,
00:12
a whaler who was swallowed whole by his prey.
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巴特利是一名捕鲸者, 却被他的猎物整个吞了下去。
00:16
Supposedly, Bartley spent as long as 36 hours in the belly of the beast
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据说,巴特利被困在鲸鱼的肚子里 长达 36 个小时,
00:21
before his crew caught the whale and rescued their crewmate.
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直到他的船员抓住了 鲸鱼才救出了他。
00:25
And this tale is far from unique.
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而这并非凤毛麟角的奇闻。
00:28
Various novels, myths, and religious texts depict figures swallowed at sea—
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很多小说、神话和宗教经文 都描绘过在海上被吞的形象,
00:34
with some even making a home for themselves
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有的甚至在那些怪物 洞穴般的大嘴里
00:37
in the creatures’ cavernous mouths.
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安了个家。
00:40
Unfortunately, if someone actually were swallowed by a whale,
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不幸的是,如果有人真的被鲸鱼吞下,
00:45
they would likely be crushed.
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他们很可能会被压碎。
00:46
But if they somehow survived,
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但如果他们以某种方式幸存下来,
00:49
they might have a chance to escape during their captor’s bathroom break.
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他们可能有机会在“绑架者” 上厕所休息时逃脱。
00:55
Whales frequently surface to take in air
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鲸鱼经常浮出水面换气呼吸,
00:58
and let out massive plumes of waste.
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并且排泄大量粪便。
01:02
And while swimming in this slurry might seem more disgusting
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虽然在这种粪水里游泳 可能看起来
01:05
than living in these creatures,
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比在这些生物体内生存还要恶心,
01:08
whale poop is much more desirable than it may seem.
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但鲸鱼的粪便比看起来更有价值。
01:12
In fact, it may be one of the most important substances in the ocean—
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实际上,它可能是海洋里 甚至是世界上
01:17
and the world.
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最重要的物质之一。
01:20
To understand why,
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究其原因,
01:21
we need to look at some of the ocean’s most ubiquitous organisms: phytoplankton.
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我们需要研究一些海洋中 最普遍的生物:浮游植物。
01:27
These creatures survive off sunlight, carbon dioxide,
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这些生物靠阳光、二氧化碳
01:31
and nutrients like phosphates, nitrogen, and iron.
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以及磷酸盐、氮气和铁 等营养物质生存。
01:36
And since the ocean’s surface waters generally have an abundance
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并且,由于海洋的表层海水通常富含
01:40
of these resources,
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该类资源,
01:41
phytoplankton are everywhere.
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浮游植物因此无处不在。
01:44
A single drop of seawater can contain thousands of these creatures
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一滴海水可以容纳 成千上万种这样的生物,
01:48
and phytoplankton blooms are large enough to be seen from space.
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浮游植物大量繁殖的规模大到 甚至可以从太空看见。
01:52
These phytoplankton then become food for countless microscopic grazers,
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之后,这些浮游植物 会成为包括肱足类和磷虾
01:58
including copepods and krill,
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在内众多微小食草生物的食物,
02:00
which in turn feed a huge swath of marine life.
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它们反过来又 为大量海洋生物提供食物。
02:04
In this way, these surface-dwellers are the base of a food chain
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通过这种方式,这些海洋 表层水域的“居民”便成为了
02:08
supporting countless marine life forms.
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支撑各个海洋生物食物链的基础。
02:11
But when phytoplankton die, their bodies can sink far below the surface,
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而当浮游植物死亡时,它们的残骸 会沉入海洋,远离表层海水,
02:17
taking with them the carbon and iron their living peers need to survive.
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从而为其它活着的浮游植物 带去其生存所需的碳和铁。
02:23
And this is where whales come in.
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这便来到了鲸鱼的舞台。
02:26
Hunting at these depths,
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鲸鱼在这一深度捕食时,
02:27
whales consume huge amounts of these phytoplankton predators.
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能吃掉大量 浮游植物捕食者。
02:32
For example, species like the blue whale
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例如,像蓝鲸这样的物种
02:35
can consume up to 16 tons of krill every day,
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每天可以吃掉 多达 16 吨的磷虾,
02:40
leading them to regularly surface and release a slick of feces red with iron.
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使得它们定期浮出水面时, 会排泄出富含铁而显红色的粪便。
02:47
Through this cycle,
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在这个循环中,
02:48
whales act as a living pump to bring iron from deeper waters back to the surface.
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鲸鱼充当活泵,将铁 从更深的水域带回地表。
02:55
However, if we take whales out of the equation—
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然而,如果我们像几个世纪 以来的商业捕鲸活动那样,
02:59
much as centuries of commercial whaling did—
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肆意把鲸鱼排除在外,
03:02
this natural system starts to break down.
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这一自然系统就会开始崩溃。
03:05
Over enough time,
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在一定时间内,
03:07
this broken cycle could lead to surface waters completely devoid of life
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这种中断的循环可能会导致 表层海水完全失去生命,
03:12
and similarly major problems for us land dwellers.
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并且同样的严重问题 也会殃及我们陆地居民自身。
03:16
Phytoplankton’s massive photosynthetic blooms
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浮游植物进行大规模 光合作用产生的氧气
03:19
produce as much as half of Earth’s oxygen.
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多达地球氧气量的一半。
03:23
And in addition to taking in iron,
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除了吸收铁外,
03:25
phytoplankton helps sequester huge amounts of carbon—
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浮游植物还能帮助 封存大量的碳——
03:29
an element we need to extract from the air to address climate change.
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也就是我们为应对气候变化 需要从空气中提取的元素。
03:34
According to one report, phytoplankton are estimated to capture four times
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据报告估计, 浮游植物捕获的碳量
03:39
the amount of carbon contained in the plant life of the Amazon.
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是亚马逊雨林植物 所吸收碳量的四倍。
03:44
From these calculations,
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根据这些计算,
03:45
every 1% increase in phytoplankton population
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浮游植物种群 每扩大 1%,
03:49
is the carbon capture equivalent of 2 billion fully grown trees
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其碳捕获量相当于 20 亿棵 完全成熟的树木
03:54
springing into existence.
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拔地而起所产生的效果。
03:57
While there’s still debate about exactly how much of this carbon
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尽管关于这些碳中 究竟有多少能长期
04:00
stays in the ocean long term,
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留在海洋仍存在争论,
04:02
researchers are working to increase phytoplankton populations
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但研究人员仍在努力增加 浮游植物的种群
04:06
and bury as much carbon as possible.
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并封存尽可能多的碳。
04:10
Some groups are doing this simply by sprinkling iron in the ocean.
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为此,有些组织仅仅 向海里撒铁。
04:14
However, this approach is much less impactful
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但这种方法的影响 远远小于
04:17
than supporting the ocean’s natural phytoplankton farmers.
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为天然浮游植物养殖者提供支持。
04:22
Whale poop’s complex matrix of nutrients is the result of millennia of co-evolution
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鲸鱼粪便的丰富营养素基质 是这些生物数千年来
04:28
among these creatures,
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共同进化的结果,
04:29
making it vastly superior to cheap, man-made supplements.
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其远远优于廉价的人造补品。
04:34
Right now, whale populations are still recovering from industrial whaling.
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目前,鲸鱼种群仍在从工业 捕鲸造成的损害中慢慢恢复。
04:39
But if we can help these species rebound through whaling moratoriums,
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但如果我们能 通过暂停捕鲸、
04:43
safer fishing and shipping practices, and cleaning up pollution,
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采取更安全的捕鱼和航运方式 以及整治污染来帮助这些物种复苏,
04:48
it would do wonders for restoring this nutrient cycle.
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这将对恢复这种营养循环产生奇效。
04:51
And even when these newly protected whales die natural deaths,
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此外,即使受到新形势下 保护的鲸鱼自然死亡,
04:55
they'll still be fighting climate change.
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它们仍能帮助抵御气候变化。
04:58
Not only can a whale’s body sequester up to 33 tons of carbon
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鲸鱼的身体不仅可以在海底封存
05:02
at the bottom of the ocean,
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多达 33 吨的碳,
05:04
but their remains can also become an entire ecosystem—
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它们的遗骸还可以 变成一个完整的生态系统——
05:08
continuing to support life both above and below the surface.
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继续为海洋表层水域 之上和之下的生命提供支持。
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