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20 Cards in this Set
- Front
- Back
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What is an ecosystem
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a community and its physical or abiotic environment
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What is the first law of thermodynamics
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energy cannot be xreated ot destroyed only transformed
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Where does energy come from
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solar radiation
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What is a primaty producer
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autotroph
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What are primaty consumers
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herbavores
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and secondary on are
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carnivores
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What are detritivores
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decomposers
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What is primaty production
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the anount of light energy comverted to chemical energy during a period of time
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What is NPP
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the net primaty production it is the gross primary production -R
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What are the units on the Net primaty production
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J/m2/yr and biomass in g/m2/yr
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what is the limiting nutrient in fresh water , salt water, and earth
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phosporous,nitrogen, water /temp
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What is production efficiency
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net secondary production/assimilation of primary production
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What is trophic efficiency
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the percentage of the energy of one trophic level that makes it to the next level ranging from 5-20%
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What is an example of a backwards biopyramid
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zooplankton and phyto plankton because of the turnover time
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What does the pyramid illustrate
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that at higher trophic levels there are smaller numbers of individuals
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What is the green world hypotheses
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proposes 5 factors stopping us from eating all the plants : plant defenses,limited essential nutrients, abiotic fluctuations, intraspecific competition, interspecific interactions , top down explanation
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What is nutrient enrichment
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the moving of crops
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What is critical load
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the amount of added nutrient that cam be acsorbed cy plants without damaging the ecosystem
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What is the cause of acid rain
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the burning of coal and other fossil feules
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What is consider acid rain
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pH less than 5.6
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