Energy Flow in Ecosystems. Ecosystem: all living (biotic) and nonliving (abiotic) factors in an area...
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Energy Flow in Ecosystems. Ecosystem: all living (biotic) and nonliving (abiotic) factors in an area Abiotic Biotic Video Clip All organisms play a role
Ecosystem: all living (biotic) and nonliving (abiotic) factors
in an area Abiotic Biotic Video Clip All organisms play a role in
their ecosystem HOW THEY GET THEIR ENERGY Organism: a living
thing
Slide 3
Role: Producer A plant that makes its own food Autotroph
(self-feeder) Make their own food through photosynthesis Examples:
leaves, trees, grass
Slide 4
Role: Consumers Cannot make own food Depend on producers for
energy Heterotrophs (different feeders) 1. Herbivores eats plants
2. Carnivores eats animals 3. Omnivores eats plants & animals
4. Scavengers eats dead plants & animals
Slide 5
Role: Decomposer Breaks down waste and dead organism &
returns raw materials to the environment Ex: bacteria, fungi,
worms
Slide 6
A world with no decomposers? Waste and dead organisms would
pile up
Slide 7
Predator A predator is an animal that eats another animal. When
looking at a food chain, if an animal is eating another animal, it
is considered a predator. In this food chain, the snake is a
predator and the fox is a predator as well. The mouse is not a
predator, as it is not eating anything.
Slide 8
Prey Prey is any animal which is hunted and killed by another
animal for food. Some animals can be both a predator and prey. In
this picture, the mouse is prey, the snake is also prey.
Slide 9
Energy enters an ecosystem as SUNLIGHT!!!
Slide 10
Food chain A model of how the suns energy is passed from
organism to organism in an ecosystem. What do you notice about the
start of this food chain? What is missing from this food chain?
(Hint where does the grass get its energy from?
Slide 11
Order of the Food Chain 1. Sun energy source 2. Producers -
plants 3. 1 st Level/Primary Consumers eats producers (herbivore or
omnivore) 4. 2 nd Level/Secondary Consumers eats 1 st level
consumers (carnivore or omnivore) 5. 3 rd Level/Tertiary Consumers
eats 2 nd level consumers (carnivore or omnivore) 6. Decomposer
recycles materials for use by producers Arrows show the direction
of the flow of energy!
Slide 12
Slide 13
Food webs Map of overlapping food chains Many different
producers and consumers a diagram that shows the feeding
relationships between organisms in an ecosystem Most organisms do
not eat the same thing every day, so they are part of more than one
food chain
Slide 14
Food Web
Slide 15
Food webs What happens if we remove an organism? The balance of
the food web is thrown off; other organisms or the ecosystem could
be destroyed.
Slide 16
Energy & Matter
Slide 17
Flow of energy When an organism eats, it obtains energy, then
uses a lot of energy in life process like growth and movement. This
means that only part of their energy is available to the next
organism in the food web.
Slide 18
Energy Pyramid Energy pyramid - a diagram that shows an
ecosystems loss of energy What is the purpose? To show the amount
of energy that moves from one feeding level to another in a food
web Facts: The greatest amount of energy is available at the
producer level The least amount of energy available to going to be
a the top of the food chain. Only 10% of the energy is passed up to
the next level
Slide 19
Energy Pyramid
Slide 20
Energy Pyramids Video Clip Copy this pyramid in notes
