00:03
Hi there.
00:04
When we think about any food web or food chain, at the bottom of that food chain are the producers.
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These are the autotrophes which can make their own food.
00:23
They're going to use energy from the sun or sometimes from chemicals, especially in the case of deep in the ocean.
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We have chemo autotrophes which use the energy and chemical bonds.
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But above the surface of the ocean, most of our producers are photosynthetic.
00:45
They use the sun's energy to fix carbon dioxide.
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In other words, they take carbon dioxide from the air and they make organic molecules out of it.
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So these are the producers.
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And again, they're the basis for any food web or food chain.
01:07
Above those then are the consumers, also known as heterotropes, meaning that they have to eat other things...