BiologySept18th2006 - to build another layer The only exceptions to this shape are aquatic ecosystems and ecosystems that have many smaller

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Dustin Lee 9/18/2006 Science Block C Pg. 788-791 questions: 2, 3 2. The berries are producers, the mouse is a primary consumer, and the owl is a secondary consumer 3. The prickly pear cactus is the producer and the first level. The antelope squirrel is the primary consumer which is the second level. The western diamondback rattlesnake is the secondary consumer which is the third level. The red-tailed hawk is on Tertiary consumer level (fourth level). Pg. 792-794 questions: 2, 3 2. Each ecological pyramid emphasizes the fact that there are many more producers than consumers. As the trophic levels get higher, the number organisms on that level are fewer than the level before because there needs to be enough prey to support the predators. This forms the shape of a pyramid with the base as the widest and as you go up it gets thinner and thinner until there isn’t enough room
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Unformatted text preview: to build another layer. The only exceptions to this shape are aquatic ecosystems and ecosystems that have many smaller consumers eating fewer bigger producers. In aquatic ecosystems a whale has much more mass than the krill it eats resulting, in a biomass pyramid, a reverse pyramid. When there are small consumers eating big consumers such as when hundreds of insects have to eat a small tree, it results in a reverse pyramid. 3. An energy pyramid emphasizes the energy loss from one trophic level to the next. In general, an average of only 10 percent of the available energy at a trophic level is converted to biomass in the next higher trophic level. The rest of the energy is lost from the ecosystem as heat....
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This note was uploaded on 09/21/2011 for the course BIOG 1110 taught by Professor Randywayne during the Spring '09 term at Cornell University (Engineering School).

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