016-Energy Flow - Energy Flow & Nutrient Cycle Energy...

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Energy Flow & Nutrient Cycle
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Food Chains Food Chains Artificial devices to illustrate energy flow from one trophic level to another Trophic Levels: groups of organisms that obtain their energy in a similar manner
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Total number of levels in a food chain depends upon locality and number of species Highest trophic levels occupied by adult animals with no predators of their own Secondary Production: total amount of biomass produced in all higher trophic levels Food Chains Food Chains
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Nutrients Nutrients Inorganic nutrients incorporated into cells during photosynthesis - e.g. N, P, C, S Cyclic flow in food chains Decomposers release inorganic forms that become available to autotrophs again
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Energy Energy Non-cyclic, unidirectional flow Losses at each transfer from one trophic level to another - Losses as heat from respiration - Inefficiencies in processing Total energy declines from one transfer to another - Limits number of trophic levels
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Energy Flow
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Primary Producer Primary Consumer Secondary Consumer Tertiary Consumer Food Chain Decomposer zooplankton larval fish fish Energy Flow through an Ecosystem Energy Flow through an Ecosystem heat heat heat phytoplankton sun water Nutrients
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This note was uploaded on 04/29/2011 for the course OCN 201 taught by Professor Decarlo,e during the Summer '08 term at University of Hawaii, Manoa.

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016-Energy Flow - Energy Flow & Nutrient Cycle Energy...

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