What Changes Would Occur In Herbivores If A New Population Of Carnivores

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Ecosystem Study Guide 1. Study all vocabulary words. 2. What happens in a food web when one of the organisms decreases? Increases? Decrease: When one organism in a food web decreases, then the organism below will increase while the organism above will decrease. Increase: When an organism increases, the number of organisms it eats will decrease and the organism that eats it will increase. 3. Why does the number of organisms decrease as you move up the levels in an energy pyramid? Nearly 90% of the energy in one level is used up by the organisms for living and growing. This means only 10% is available for the organisms at the next level. 4. Describe the roles of zebras and lions in a grassland ecosystem. The zebras are…show more content…
What changes would occur in an ecosystem of herbivores if a new population of carnivores moved in? The herbivore population would decrease. Example: A family of bobcats moves into the ecosystem and so a rabbit population would decrease. 7. How can biotic factors change an environment? A plant population can overtake other plants, blocking their ability to make food (photosynthesis). Example: Kudzu vines growing quickly up trees. 8. What happens if there are too many herbivores in a certain area of an ecosystem? The plant population (producers) would decrease. 9. When a new population moves into an area and feeds on the old population of organisms, what happens to the old and new populations of organisms? The old population would decreas e and the new population would increase. Example: A new cat family moves into a barn. The mouse population decreases because they are food for the cats. 10. How can several different species of the same organism share the same habitat and resources? Different species of the same organism share the same habitat and resources because they have different niches or roles in the

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