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

致力于保护引好奇的大型动物的环保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.

我一直想知道为什么非洲会有巨型动物，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.

但类抵达后，这些巨型动物就消失了。

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

在大型动物里，没有几种动物可以匹敌大象的魅力，这种魅力让大象很有政治影响。

But some might be the ancestors of the Cambrian megafauna.

但中的一些可能就寒武纪大型动物的祖先。

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

但在短期看来，这些富有魅力的巨型动物面对的最大的障碍我。

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

有了这些巨型动物光顾，牛油果树就能继续结果，继续结出更巨大的种子。

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

它遍布水面，还有许多巨型动物鲸鱼、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，附近的另一种大型动物，类到来了。

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

偶尔，巨型动物的尸体，如鲸鱼，会沉入海底。

But, you know, this is more than just a story about some charismatic megafauna.

但，你知道，这不仅仅一个关于一些有魅力的巨型动物的故事。

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巨型动物，如鲨鱼、旗鱼和巨型金枪鱼。

Hence the megafauna probably became extinct soon after humans reached Australia.

因此，巨型动物可能在类到达澳大利亚后不久就灭绝了。

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巨型动物被归类为濒危物种，但只有北极熊主要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巨型动物最终灭绝了，因此可用的猎物种类减少了。

But back in the Pleistocene, it seems that at least some megafauna could tolerate the toxins.

但回到更新世，似乎至少有一些巨型动物能够耐受这些毒素。

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

而且它的魅力不亚于您在自然纪录片中看到的任何巨型动物。

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巨型动物的尸体为食，比如猛犸象、野牛和巨型树懒。

They vary from the delight that megafauna provide those visiting a safari park to the more prosaic: pollinators fertilising crops; earthworms keeping the soil healthy.

包括大型动物为参观野生动物园的游客带来的愉悦，也包括一些更平淡的用处：传粉昆虫给农作物授粉，蚯蚓保持土壤健康。

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巨型动物的灭绝。