"Wyoming’s Natural Resources" script
By Zola Ryan
Title: Plant Dispersal
Scene Narration
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All living things face competition for resources. One way of dealing with this is to expand or migrate into new areas. But if you’re a plant, you have a problem – you can’t just pick up and move. |
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So plants expand their territories through their offspring, and they’ve got some ingenious ways of doing this. |
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Some plants use the wind for transportation. We’re all familiar with the dandelion seed. And how about the seed of this maple tree? |
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Other plant seeds float to a new location on streams and rivers. |
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And there are all sorts of ways for plant seeds to be carried to new locations by animals. Burs, like this puncturevine, get caught in fur. |
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Rodents often move seeds around in their efforts to store food. Birds eat berries and then deposit the seeds in a new location, along with a dose of fertilizer! |
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This plant is called carigana. Its seeds actually explode out of the fruit, landing as far as 30 feet away! |
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Some plants such as aspen expand their territory by starting new shoots off of old roots, allowing them to be one of the world’s largest living organisms. |
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Now that’s impressive! From the University of Wyoming Cooperative Extension Service, I’m Zola Ryan. |