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Published byArchibald Freeman Modified over 6 years ago
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Ecosystem inputs nutrients cycle inputs energy nutrients
biosphere energy flows through nutrients cycle inputs energy nutrients
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Energy flows through ecosystems
sun secondary consumers (carnivores) loss of energy loss of energy primary consumers (herbivores) producers (plants)
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Food chains Trophic levels sun feeding relationships
Tertiary consumer Trophic levels feeding relationships start with energy from the sun captured by plants 1st level of all food chains food chains usually go up only 4 or 5 levels inefficiency of energy transfer all levels connect to decomposers top carnivore Level 3 Secondary consumer carnivore Level 2 Primary consumer heterotrophs herbivore Level 1 Producer autotrophs Fungi Decomposers Bacteria
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Inefficiency of energy transfer
sun Inefficiency of energy transfer Loss of energy between levels of food chain To where is the energy lost? The cost of living! 17% growth energy lost to daily living only this energy moves on to the next level in the food chain 33% cellular respiration 50% waste (feces)
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Ecological pyramid sun Loss of energy between levels of food chain
can feed fewer animals in each level 1 100 100,000 1,000,000,000
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What is your ecological footprint?!
Humans in food chains Dynamics of energy through ecosystems have important implications for human populations how much energy does it take to feed a human? if we are meat eaters? if we are vegetarian? What is your ecological footprint?!
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Food webs Food chains are linked together into food webs
Who eats whom? a species may weave into web at more than one level bears humans eating meat? eating plants?
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Any Questions??
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