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30 Cards in this Set
- Front
- Back
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Bears eat berries, humans, and large fish; large fish eat smaller fish and insects; humans eat bears, large fish, and berries; venus fly traps eat insects. The scenario described here is an example of _____.
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a food web
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A mosquito that lives off of the blood of birds and mammals is an example of ____.
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parasitism
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What are estuaries?
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regions wehere fresh water and salt water mix
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The major abiotic reservor for phosporus is ____.
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rock
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In what ocean zone are phytoplankton found?
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pelagic
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What form of carbon is incorporated into organic matter by producers?
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CO2
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In the food chain the antelope is ____.
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both an herbivore and a primary consumer
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Globally, most water moves from _____.
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the oceans to the atmosphere by evaporation
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As a result of a distubance, a community will _____.
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undergo succession
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Populations of two coexisting species both only feed at the thrid trophic level. What relationship may exist between these two organisms?
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competition
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In the food chain grass is a(n) ____.
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secondary consumer
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Ecologists sometimes studey ____ by studying several different locations at different stages of this process.
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succession
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Organisms at the first trophic level are ____.
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autotrophs
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Bacteria and fungi that feed on wastes and decomposing organisms in an ecosystem are examples of _____.
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detritivores
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Which of these organisms are ultimately responsible for making energy available to the other organisms listed here?
a) primary consumers b) carnivores c) heterotrophs d) producers e) herbivores |
producers
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The Sahara Desert and the Negev Desert belong to the same ____.
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biome
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In an aquatic ecosystem, what name is given to the region where photosynthesis can occur?
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photic zone
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What organisms for the substrate of a coral reef?
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cnidarians
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On average, what percentage of the energy in the form of organic matter at one trophic level is NOT stored as biomass at the next highest trophic level?
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90%
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Overgrazing of savannas can result in the formation of _____.
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desert
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Approximately what percent of the visible light reaching Earth's surface do producers convert into chemical energy?
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0.01%
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What name is given to the region where sea meets land?
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aphotic zone
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What is the dominant herbivore of savanna ecosystems?
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insects
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What name is given to the open ocean?
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pelagic zone
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In general, you would expect an energy pyramid to have roughly the same shape as a diagram illustrating changes in ____ with increasin trophic level.
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biomass
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Which one of the following increases oxygen levels in water?
a) decreased photosynthetic activity b) increased mixing and tubulence c) increased temperature d) increased decom position e) increased salinity |
increased mixing and tubulence
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Which of these biomes is maintained by fire?
a) tundra b) temperate deciduous forest c) tropical forest d) desert e) chaparral |
chaparral
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The main abiotic reservoir for carbon is _____.
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the atmosphere
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Why are most energy pyramids limited to three to five levels?
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There is insufficient energy to support more trophic levels
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Humans are _____.
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omnivores
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