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Ecosystems 2- BROWN 14-15
Transcript of Ecosystems 2- BROWN 14-15
All living things need energy to survive. Most energy comes directly or indirectly from the sun
Producer: an organism that captures energy and stores it in food as chemical energy
· Types of producers: plants, algae, moss
Consumer: an organism that gets its energy by eating (or consuming) other organisms
Types of consumers:
Primary consumer: Eats a producer
Secondary consumer: Eats a primary consumer
Tertiary consumer: Eats a secondary consumer
Quaternary consumer: Eats a tertiary consumer (only in
some food chains)
Apex predator: Top predator (it does not have any
natural predators that hunt/eat it) (only in some food
Decomposer: an organism that breaks down dead plant and animal matter into simpler compounds
Many decomposers living the soil
break down once-living things & return matter to the soil to be used by plants.
feed on both producers and consumers
MODELS HELP EXPLAIN FEEDING RELATIONSHIPS P 26-27
Energy is captured by producers and passed on to consumers through food chains and food webs
Arrows are used in a food chain or a food web to show energy being passed from one organism to another.
Food Chain: describes the feeding relationships between a producer and a single chain of consumers in an ecosystem.
Shows energy flow like a chain- one link at a time only.
Energy moves from ONE producer to ONE primary consumer to ONE secondary consumer to ONE tertiary consumer.
Ex: Grass --> grasshopper --> robin --> cat
Food Web: a model of the feeding relationship between MANY different producers and consumers in a relationship.
Shows energy flow along many pathways, like a web
Energy moves from MANY producers to MANY primary consumers to MANY secondary consumers to MANY tertiary consumers.
AVAILABLE ENERGY DECREASES AS IT MOVES THROUGH AN ECOSYSTEM P 28
Energy Pyramid: a model that shows the amount of energy available at each feeding level of an ecosystem
Energy is LOST as it MOVES UP the pyramid
The energy is lost because each organisms must use some of the energy for life processes like digestion, movement, etc.
The most energy is available at the PRODUCERS (bottom) of the energy pyramid because the producer captures the sun’s energy directly. At this point, only the plant has used some of the energy (and not any other organism)
Watch how energy is lost in food chain
There are less lions in an ecosystems than giraffes because much of the energy the lion must get to survive is lost in its way up that food chain
The giraffe receives more energy fom its food becasue the energy has not gone through as many organisms as the energy that eventually gets to the lion.
Write a paragraph, venn diagram, or acrostic poems (using the words ecosystem) about each section.
TSW create an analogy of how populations living together within a community interact with one another and with their environment in order to survive and maintain a balanced ecosystem.
TSW use models to demonstrate how energy flows from organism to organism in an ecosystem.
list one example of a non-plant producer
List two examples of decomposers.
What happens to waste from organisms in ecosystems.
Make a Food Web, Food Chain, and Energy Pyramid!