But the really important thing about hippo dung is its place in the food chain.

但河马粪便真正要意义在于其在食物中地位。

It's at the top of a huge food chain.

它位于一条巨大食物端。

We were the bottom of the food chain.

我们处于食物底层。

When it's washed, it releases microplastics into the ocean, into the food chain, into us.

当它被洗涤时，会释放塑料微粒进入海洋，进入食物、进入我们体内。

From bees to dogs, we're moving up the food chain today.

从蜜蜂狗，我们今天正在向食物端移动。

Here's Ruth Alexander, presenter of BBC World Service's The Food Chain, to continue the story.

BBC世界服务栏目《食物》主持人露丝·亚历山大继续讲述了这个故事。

It stays in the fish's body, and it enters the food chain.

它会留在鱼体内，并进入食物。

If that happens, the entire food chain will be severely damaged.

如果这种情况发生，整个食物将遭破坏。

Every day they're dealing with predators, up and down the food chain.

它们每天都在和捕食者打交道，在食物游和下游。

In such a frugal environment, the pika's farming helps to kick start the food chain.

在如此俭朴环境，鼠兔耕作有助于推动整个食物。

Sharks' position at the top of the food chain affects the entire ocean ecosystem.

鲨鱼在食物端位置影响着整个海洋生态系统。

You're a little low on the food chain to...

你这食物底层没资格嘴。

So certain food chains actually became stronger after the fire than they were before.

所以，大火过后，相应食物会变得比之前更加稳定。

This seems to be dangerous no matter where you are on the food chain.

对食物中任何生物这都是危险。

Once in farm animals, they become part of the food chain.

一旦农场动物使用抗菌素，那么抗菌素也会成为食物一部分。

Can't forget the bottom of the food chain, right?

不能忘记食物底层，对吧？

If the trend continues, entire food chains and webs may be at risk.

如果这种趋势继续下去，整个食物和网络都可能面临风险。

Living at the top of the food chain, sharks can accumulate dangerous levels of methylmercury.

因为生活在食物端，所以鲨鱼可以积累达危险水平汞。

The other one is that they eat the fish that eat those.

所以这取决于鲸鱼捕食动物在食物中位置。

If their DNA gets into Earth's food chain, our entire species could be sterilized.

如果它们基因进入地球食物，我们全部物种都可能绝育。