Energy Flow in Ecosystems. Food chains: show the path of energy through trophic (feeding) levels...
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Transcript of Energy Flow in Ecosystems. Food chains: show the path of energy through trophic (feeding) levels...
Energy Flow in
Ecosystems
Food chains: show the path of energy through trophic
(feeding) levels Energy come from the Energy is not recycled – it decreases and
is “lost” (made unavailable in the form of heat)
Level 1 - Producers Undergo
photosynthesis (plants, algae, some bacteria)
Use energy from the sun to make food (glucose)
Level 2 - Primary (1) Consumers Herbivores – eat plants
Level 3 – Secondary (2) Consumers Carnivores – eat meat Omnivores – eat
both meat and plants
Pygmy
Golden Headed Lion Tamarin
Margay
Detritivores - obtain energy from dead organisms at all trophic levels Decomposers –
cause decay Bacteria, fungi,
worms Rabbit
Scavengers – feed on the remains of dead organisms
snails, crabs, worms, raccoons, maggots, vultures, hyenas
Gecko
Review
PRACTICE!!! Producer Fourth order
(quaternary) consumer Second order
(secondary) consumer First order (primary)
consumer Third order (tertiary)
consumer
Food Web vs. Food Chain
What is the difference between a food chain and a food web?
Energy flow through ecosystems can be represented using a pyramid - why? 10% of the energy at each level is passed on to the next
level, 90% is used by heat and metabolism. Energy decreases as you move through trophic levels! It takes a lot of vegetation to support higher trophic
levels.