FSU BSC 2011 - Species Interaction/ Trophic levels

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54.2: Species Interaction/ Trophic levels“Food Chain” (land and aquatic have these levels)Producers: make food through photosynthesis (bottom of food chain)Primary Consumers: eat plants/algae (eat producers) Secondary Consumers: eat primary consumersTertiary Consumers: next level of consumers …..*one species can be in more than one trophic level*The more energy there is, the more trophic levels there are. The community can be influenced by the environment and interaction between species.Ex: The Pisaster starfish are the top predators in their system because they are mobile and they can eat basically anything. In an experiment when the starfish were removed from the environment thenumber of species in the system plummeted. This is because the starfish prey on mussels, and without the starfish the mussel population was no longer controlled and they out competed every other species and took over. The mussels prevented other species from


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FSU BSC 2011 - Species Interaction/ Trophic levels

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