B1 中級 英國腔 24129 分類 收藏
開始影片後,點擊或框選字幕可以立即查詢單字
字庫載入中…
回報字幕錯誤
In the 1600s, there were so many
right whales in Cape Cod Bay

off the east coast of the U.S.
that apparently you could
walk across their backs

from one end of the bay to the other.
Today, they number in the hundreds,
and they're endangered.

Like them, many species of whales
saw their numbers drastically reduced

by 200 years of whaling,
where they were hunted and killed
for their whale meat, oil and whale bone.

We only have whales in our waters today
because of the Save the Whales
movement of the '70s.

It was instrumental in stopping
commercial whaling,

and was built on the idea that
if we couldn't save whales,

what could we save?
It was ultimately a test
of our political ability

to halt environmental destruction.
So in the early '80s, there was
a ban on commercial whaling

that came into force
as a result of this campaign.

Whales in our waters are still
low in numbers, however,

because they do face a range
of other human-induced threats.

Unfortunately, many people still think
that whale conservationists like myself

do what we do only because these creatures
are charismatic and beautiful.

This is actually a disservice,
because whales are ecosystem engineers.
They help maintain the stability
and health of the oceans,

and even provide services
to human society.

So let's talk about why
saving whales is critical

to the resiliency of the oceans.
It boils down to two main things:
whale poop and rotting carcasses.
As whales dive to the depths to feed
and come up to the surface to breathe,

they actually release these
enormous fecal plumes.

This whale pump, as it's called,
actually brings essential limiting
nutrients from the depths

to the surface waters where they
stimulate the growth of phytoplankton,

which forms the base
of all marine food chains.

So really, having more whales
in the oceans pooping

is really beneficial
to the entire ecosystem.

Whales are also known to undertake some
of the longest migrations of all mammals.

Gray whales off America
migrate 16,000 kilometers

between productive feeding areas and less
productive calving, or birthing, areas

and back every year.
As they do so, they transport fertilizer
in the form of their feces

from places that have it
to places that need it.

So clearly, whales are really
important in nutrient cycling,

both horizontally and vertically,
through the oceans.

But what's really cool is that they're
also really important after they're dead.

Whale carcasses are some of
the largest form of detritus

to fall from the ocean's surface,
and they're called whale fall.

As these carcasses sink,
they provide a feast
to some 400-odd species,

including the eel-shaped, slime-producing
hagfish.

So over the 200 years of whaling,
when we were busy killing and removing
these carcasses from the oceans,

we likely altered the rate and geographic
distribution of these whale falls

that would descend into deep oceans,
and as a result, probably led
to a number of extinctions

of species that were most specialized
and dependent on these carcasses
for their survival.

Whale carcasses are also known
to transport about 190,000 tons of carbon,

which is the equivalent of that produced
by 80,000 cars per year
from the atmosphere to the deep oceans,
and the deep oceans
are what we call "carbon sinks,"

because they trap and hold
excess carbon from the atmosphere,

and therefore help
to delay global warming.

Sometimes these carcasses
also wash up on beaches

and provide a meal to a number
of predatory species on land.

The 200 years of whaling
was clearly detrimental

and caused a reduction
in the populations of whales

between 60 to 90 percent.
Clearly, the Save the Whales movement
was instrumental in preventing
commercial whaling from going on,

but we need to revise this.
We need to address the more modern,
pressing problems that these whales face

in our waters today.
Amongst other things, we need to stop them
from getting plowed down by container
ships when they're in their feeding areas,

and stop them from getting
entangled in fishing nets

as they float around in the ocean.
We also need to learn to contextualize
our conservation messages,

so people really understand the true
ecosystem value of these creatures.

So, let's save the whales again,
but this time, let's not just
do it for their sake.

Let's also do it for ours.
Thank you.
(Applause)
提示:點選文章或是影片下面的字幕單字,可以直接快速翻譯喔!

載入中…

【TED】阿莎·德沃斯: 為什麼鯨魚糞便值得關注 (Asha de Vos: Why you should care about whale poo)

24129 分類 收藏
CUChou 發佈於 2015 年 1 月 28 日
看更多推薦影片
  1. 1. 單字查詢

    在字幕上選取單字即可即時查詢單字喔!

  2. 2. 單句重複播放

    可重複聽取一句單句,加強聽力!

  3. 3. 使用快速鍵

    使用影片快速鍵,讓學習更有效率!

  4. 4. 關閉語言字幕

    進階版練習可關閉字幕純聽英文哦!

  5. 5. 內嵌播放器

    可以將英文字幕學習播放器內嵌到部落格等地方喔

  6. 6. 展開播放器

    可隱藏右方全文及字典欄位,觀看影片更舒適!

  1. 英文聽力測驗

    挑戰字幕英文聽力測驗!

  1. 點擊展開筆記本讓你看的更舒服

  1. UrbanDictionary 俚語字典整合查詢。一般字典查詢不到你滿意的解譯,不妨使用「俚語字典」,或許會讓你有滿意的答案喔