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AP Bio Chapter 54

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Answer
Primary Producers   Level that ultimately supports all life in an ecosystem  
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Primary Consumers   Herbivores  
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Secondary Consumers   Carnivores that eat herbivores  
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Tertiary Consumers   Carnivores that eat carnivores  
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Detritivores   Get energy from detritus  
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Detritus   Non-living organic material  
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Food chain   Pathway along which food is transferred  
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Food Web   Complex feeding relationships  
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Production   Rate of incorporation of energy and materials into the bodies of organisms  
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Consumption   Assimilating organic materials  
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Decomposiyion   Breakdown of organic materials  
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Primary Productivity   Light energy converted to energy over a given time  
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Gross Primary Productivity (GPP)   Total primary productivity  
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Net Primary Productivity (NPP)   GPP minus energy used for respiration  
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Biomass   Energy per unit area per unit time  
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Standing Crop Biomass   Total biomass of primary producers  
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Limiting Nutrient   Further productivity limited by a single nutrient  
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Secondary Productivity   Rate in which the ecosystem's consumers convert food into biomass  
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Ecological efficiency   % energy transferred from one trophic level to the next  
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Pyramid of Productivity   Stack trophic levels in blocks  
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Biomass Pryamid   Each tier is a standing crop biomass  
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Turnover time   Standing crop biomass vs. productivity  
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Pyramid of numbers   Shows how many individuals are present in each trophic level  
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Biogeochemical cycles   A nutrient circut  
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Nitrogen fixation   A way for nitrogen to enter an ecosystem  
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Nitrification   Oxidation of ammonium by plants  
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Denitrification   Nitrate converted back into N2  
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Ammonification   Nitrogen decomposed back into ammonium  
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Long-term ecological research(LTER)   Dynamics of ecosystems over long periods of time  
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Biological magnification   Toxins concentrated in successive trophic levels of a food web  
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Greenhouse effect   Re tension of solar heat  
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