Ecology - Unit 1 (Energy Flow)
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Trophic Levels
the position of an organism in the food chain
As one organism feeds on another, ___ from a trophic level to the next
As one organism feeds on another, energy is transferred from a trophic level to the next
Energy in an ecosystem comes from the ___.
Energy in an ecosystem comes from the sun
Plants use the sun to carry out ____.
Plants use the sun to carry out photosynthesis
At each trophic level or feeding step, A LOT of energy is lost (around ____!)
At each trophic level or feeding step, A LOT of energy is lost (around 90%!)
1st law of thermodynamics
energy and matter can neither be created nor destroyed, it can only be converted
2nd law of thermodynamics
for every energy conversion in the environment, only some thermal energy is generated
____ of energy is transferred from one trophic level to the next
10% of energy is transferred from one trophic level to the next
____ of energy is lost as heat
90% of energy is lost as heat
biomass
renewable organic material that comes from plants and animals