Conservationists intent on preserving charismatic megafauna have reason to lament the spread of plastics through the ocean.

致力于保护引人好奇的大动物的环保人士有理由担心海洋塑料污染的蔓延。

We've always wondered why Africa has the megafauna, why it has these great grand wildernesses, these great migrations.

我们一直想知道为什么非洲会有动物，为什么会有这么大的荒原，以及这些大迁徙。

But most of these so-called megafauna disappeared once humans hit the scene.

但人类抵达后，这些动物就消失了。

FEW megafauna are more charismatic than elephants, and that charisma gives them political clout.

在大动物里，没有几种动物可以匹敌大象的魅力，这种魅力让大象很有治影响。

But some might be the ancestors of the Cambrian megafauna.

但是他们中的一些可能就是寒武纪大动物的祖先。

But in the short term, one of the biggest hurdles these charismatic megafauna face is us.

但在短期看来，这些富有魅力的动物面对的最大的障碍是我们。

And with these megafauna around to eat the fruit, avocado trees could keep growing berries with increasingly massive seeds.

有了这些动物光，果树就能继续结果，继续结出更大的种子。

They littered the surface of the water and just so many megafauna whales and dolphins and marlin jumping out.

它们遍布水面，还有许多动物鲸鱼、海豚和马林鱼跃出水面。

This march of megafauna mortality coincides suspiciously with the arrival of another large animal in their vicinity: humans.

与此同时，附近的另一种大动物，人类到来了。

Occasionally, the bodies  of megafauna, like whales, sink to the ocean floor.

偶尔，动物的尸体，如鲸鱼，会沉入海底。

These hyper-productive, nutrient-rich  ecosystems support large populations of megafauna, like sharks, swordfish, and giant tuna.

这些高产、营养丰富的生态系统养育着大量的动物，如鲨鱼、旗鱼和金枪鱼。

Half of Earth's land-based megafauna are classified as threatened with extinction, but only polar bears are endangered primarily by climate change.

地球上有一半的陆地动物被归类为濒危物种，但只有北极熊主要是因为气候变化而濒临灭绝。

About a third of all marine megafauna eventually went extinct, so fewer prey species were available.

大约三分之一的海洋动物最终灭绝了，因此可用的猎物种类减少了。

And they're no less charismatic than any of the megafauna that you're used to seeing in a nature documentary.

而且它们的魅力不亚于您在自然纪录片中看到的任何动物。

During the Pleistocene, condors feasted on the carcasses of the famous megafauna from that epoch, like mammoths, bison, and giant sloths.

在更新世期间， 秃鹰以那个时代著名的动物的尸体为食，比如猛犸象、野和树懒。

Water became scarce, and inland lakes shrunk or disappeared, changes that might have contributed to the extinction of the megafauna.

水变得稀缺， 内陆湖泊缩小或消失，这些变化可能导致了动物的灭绝。

During this epoch, about 90 genera of mammal megafauna -- about 72% of them worldwide -- went extinct.

在这个时代，大约 90 属的哺乳动物——全世界大约 72%——灭绝了。

As the biggest of the marsupial lions, Thylacoleo carnifex was uniquely suited to feasting on the grazing megafauna that roamed Pleistocene Australia.

作为最大的有袋狮子，袋狮非常适合捕食更新世澳大利亚的大食草动物。

The Pleistocene extinctions brought about the end of most North American megafauna -- but, only on land.

更新世的灭绝导致了大多数北美动物的灭绝——但仅限于陆地。

So, for the wild squash, the pronghorn and the condor, the world changed enormously when most of the megafauna disappeared in the Pleistocene.

因此，对于野生南瓜、叉角羚和秃鹰来说，当大多数动物在更新世消失时， 世界发生了翻天覆地的变化。