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Energy Flow in Ecosystems

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Mr. Emhardt

on 13 November 2017

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Transcript of Energy Flow in Ecosystems

From Producers to Consumers
Producers must convert sunlight into food to provide food for consumers

Types of Consumers
Trophic Levels and Energy Pyramids
Energy is lost each time it is transferred to the next trophic level
Only 10% of organism’s energy makes it to next level
Energy Pyramid - Visual for the energy of trophic levels

Energy Transfer
Eating transfers energy between organisms
Studied with food chains, food webs, and trophic levels

Life Depends on the Sun
Sun is the primary source of energy for almost all organisms
Plants use photosynthesis to create sugar molecules from sunlight
Cellular Respiration
Process of breaking down food to yield Energy
Reverse of photosynthesis

Energy Flow in Ecosystems
Describe how energy is transferred from the sun to producers and then to consumers
Describe one way in which consumers depend on producers
List two types of consumers
Explain how energy transfer in a food web is more complex than energy transfer in a food chain
Explain why an energy pyramid is a representation of trophic levels

Deep-ocean ecosystems
Sunlight does not reach bottom of ocean
bacteria use gas escaping from cracks in ocean floor to create energy

Producer – organism that makes its own food
Consumer – organism that gets energy by eating other organisms
Herbivore – eats only producers (plants)
Carnivore – eats only consumers (animals)
Omnivore – eats both (plants and animals)
Decomposer – breaks down dead organisms

Food chain – sequence of energy transfer from one organism that eats another
Food web – shows many feeding relationships possible in an ecosystem
Trophic level – each step in transfer of energy
How Energy Loss Affects an Ecosystem
Energy loss leads to less higher level predators
Rarely more than four or five trophic levels
Top level predators must eat more to obtain necessary energy
Leads to Biomagnification
Full transcript