They get into the food chain.

They all study about the food chain.

We connect the dots in the supply chain.

It's still working its way up the food chain.

This is just the food chain unfolding.

They start at the top of the technology food chain.

This is called fishing down the food chain.

And at the end of the food chain, we are eating them as well.

Understand where you are in the food chain, where your food comes from.

This is the foundation of the whole food chain in the Arctic, right here.

A food chain also shows how the organisms are related with each other by the food they eat.

These are things that are getting into our food chain because of these blooms.

We look at these pictures and we understand, for the first time, our role in this supply chain.

In fact, I can look over here, and this is kind of a little simplified food web that's going on with the creatures.

Bromeliad epiphytes accumulate water in leaf axils to form phytotelmata that may contain complex aquatic food webs.

It may have been at the top of the food chain in its local ecosystem.

The animals at the lower parts of the food chain, they reproduce very fast they grow really fast they produce millions of eggs.

And, you know, once a toxin is in the food chain everything is affected, including us.

Most of the biomass is low on the food chain, the herbivores, the parrotfish, the surgeonfish that eat the algae.

So we're not only simulating biological dynamics food webs and all that but also geologic, you know, on a very simple core scale.

Oxfam s advocacy is raising the standards for the global food industry.

We get droughts, increased desertification, crashing food systems, water scarcity, famine, forced migration, political instability, warfare, crisis.

Of course we also, particularly in the last decade, managed to envelop the world in a dense chain of supermarkets, in a chain of global trade.

You want me to deliver human rights throughout my global supply chain.

In fact, if we were meant to be on the top of the food chain, don't you think we would have some claws to rip through flesh?

When my turn comes, if Cata questions the logic of the food chain, I have no idea what I will say.

Humans are not at the top of the food chain. After all, lions eat people, but people don't eat lions.

They may have migrated to Arctic and sub Arctic waters in response to changes in the marine food chain during the Pliocene.

Now, I didn't come here to depress you about the state of the global supply chain.

And the real problem with the global supply chain is that it's supranational.

We'll apply that throughout our global supply chain regardless of ownership or control.

So, it seemed that the toxin that was killing the gharial was something in the food chain, something in the fish they were eating.

This post is part of our special coverage Global Development 2011. This post was commissioned as part of a Pulitzer Center Global Voices Online series on Food Insecurity.

We wanted to see if the most common fish in the deep ocean, at the base of the food chain, was ingesting these poison pills.

The world needs to wake up to the need for policies that address all stages of the food chain, from production to consumption.

So here's a food web, or a map of feeding links between species that live in Alpine Lakes in the mountains of California.

Like the tigers and wolves of the Northern Hemisphere, from which it obtained two of its common names, the thylacine was an apex predator.

This post was commissioned as part of a Pulitzer Center Global Voices Online series on Food Insecurity. These reports draw on multimedia reporting featured on the Pulitzer Gateway to Food Insecurity and bloggers discussing the issues worldwide.

This post was commissioned as part of a Pulitzer Center Global Voices Online series on Food Insecurity that draw on multimedia reporting featured on the Pulitzer Gateway to Food Insecurity and bloggers discussing the issue worldwide.

And that's the difference between a PCB and, say, something natural like an omega 3, something we want out of the marine food chain.

Global production reached more than 1.6 million tonnes in 2003, worth about 9 billion U.S. dollars.

The more intact, the more complete, the more complex your food web, the higher the resilience, the more likely that the system is going to recover from the short term impacts of warming events.

For an animal of its size, for the most part, its preferred foods lie unusually relatively low in the food chain, including zooplankton and small fish.

And so, in fact, if you know you have these kleptoparasitic bees, you know that your environment is healthy, because they're top of the food chain bees.

He can nourish his elephant, but cannot nourish his child.