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12 Cards in this Set
- Front
- Back
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Give an example of a population, community, and ecosystem in a typical savannah biome. |
Population- a herd of buffalo Community- buffalo, lions, alligators Ecosystem- dirt, water, other animals |
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Describe an abiotic factor that impacts the diversity of an ecosystem. |
Climate, water, terrain (land, soil), natural disasters (floods, earthquakes). |
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Name 3 possible limiting factors for a population of geese on a lake. |
# of predators, disease, food, amount of space. |
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Describe how a drought that kills most of the grass may affect the rabbit population. |
When a flood kills grass, food becomes a limited factor. Without this primary producer, the entire food web is at risk. The rabbit population would decline and so would the rabbits predators. |
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Explain the statement "all energy can be traced back to the sun". Use the words autotroph, heterotroph, producer, and consumer. |
The sun is our main source of energy. Autotrophs convert energy into sunlight by trapping it in its chemical bonds, AKA producers. Hetetrophs, or consumers, get this energy eating producers or other consumers |
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Where is the energy stored in an ecosystem and how is it released for use by organisms? |
By breaking the bonds that are between the carbon in glucose and other molecules. |
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What percent of the energy is passed up the energy pyramid at a tropic level? What happens to the rest of the energy |
10% of it only makes it up. The rest is lost as heat, used for reproduction, or movement, etc. |
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What would you tell someone who thought that decomposers were gross and an unnecessary part of an ecosystem? how do they impact the flow of energy? |
Bacteria and fungi- they break down dead matter and release nutrients into the ecosystem. Nutrients (aka matter) cant be recycled without decomposers. |
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Describe how matter cycles through different tropic levels in a food web. |
Matter cycles through he trophic levels in food molecules (in the flesh of plants and animals). |
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Why are the tropic levels at the top associated with a lower energy storage rate? Where does energy from the lower levels go? |
Much of the energy held at the lower tropic levels is lost as heat when the organisms perform their metabolic functions. The process of using stored energy is not very self efficient. |
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Describe the flow of the energy through one part of the food web. |
Energy flows from the grass then to the grasshoppers, then to the snakes, then to the kookaburra/ eagle. |
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What effect would removing the grasshopper from the ecosystem have on the grass? the rabbits? |
Grass would increase because the grasshoppers wouldn't be eating it. Rabbits would increase because there would be more grass to eat. |
