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Here we're going to contrast three different types of interactions in ecological systems.
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First, competition is an interaction where multiple organisms are competing for a limited resource.
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So multiple organisms, they require a limited resource.
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Okay.
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And some examples of that.
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Maybe we're talking about space or food or, or a mate or other resources like water and nutrients from the soil, sunlight.
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On coral reefs, one major competition is for space.
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There's so many different organisms that live in a coral reef ecosystem that they have to compete for a place to live.
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And we see a lot of competition between corals, coral and coral competition and corals and sponges.
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They even have chemical defenses against each other where they can chemically put out these toxins to help keep other competing sponges or corals from getting close to them.
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And even some corals at night when they're feeding, their tentacles pop out and can sting any other competitors that are nearby to try to keep them from taking over their space.
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So space is a space to live is a big resource that organisms compete over.
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Predation is an interaction where one organism, let's say the predator, consumes the other.
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We call that the prey.
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Okay, so this is beneficial.
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It's positive for the predator.
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And it's detrimental or negative for the prey.
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Okay, an example that we see on coral reefs would be things like sea turtles that feed on anemones.
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And then lastly, symbiosis is an interaction where organisms live in a close association with each other, with each other...