Topic 4 Ecology 4.2 Energy Flow.

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Topic 4 Ecology 4.2 Energy Flow

Energy Flow Where does the energy come from for most ecosystems? How is it turned into chemical energy? How are heterotrophs dependent on this? Different ecosystems have different amounts of available energy Availability vs use

Energy Flow Chemical energy in carbon compounds flows through food chains by means of feeding

Energy Flow Energy released by respiration is used in living organisms and converted to heat Why do cells need energy? Are energy transformations 100% efficient? What happens to heat?

Energy Flow Trophic Levels

Energy Flow Why is so much energy lost? Released as heat Not all of the organism is consumed Not all that is consumed is digested or absorbed

Energy Flow Biomass – total mass of a group of organisms Biomass is lost Since carbon compounds contain energy, biomass contains energy CO2 and water loss from respiration Uneaten or undigested parts

Energy Flow The loss of energy restricts the length of food chains and biomass at higher trophic levels