energy flow through an ecosystem
DESCRIPTION
Energy Flow Through an Ecosystem. Food Chains, Food Webs, Energy Pyramids. Begins with the SUN Photosynthesis. 6CO 2 + 6H 2 O + sunlight & chlorophyll C6H 12 O 6 + 6O 2. The chemical reaction by which green plants use water and carbon dioxide and light from the sun to make glucose. - PowerPoint PPT PresentationTRANSCRIPT
• The chemical reaction by which green plants use water and carbon dioxide and light from the sun to make glucose.
• ENERGY is stored in glucose; glucose is stored as starch.
An organism is …..
• Any independent living thing
• Can be as small as a
single celled bacteria
• Or as large as a whale!
Producers Are-• Producers get their
food and energy from the sun. (PLANTS)
• They are AUTOTROPHS
• They make their food through a process called photosynthesis.
CELLULAR RESPIRATION is the chemical reaction that releases the
energy in glucose.
6O2 + C6H12O6 --> 6H2O + 6CO2 + energy
The energy that is not used by producers can be passed on to
organisms that cannot make their own energy.
Types of consumers are
• There are THREE types of Consumers– Herbivores– Carnivores– Omnivores.
• Its still all about what you eat!
Stop…Review…Check…Turn to your partner and tell them the meaning of each
word. Also give two examples of each.
• Carnivore:
• Herbivore:
• Omnivore:
Consumers that eat producers to get energy:
• Are first order or primary consumers
• Are herbivores (plant-eaters)
Some energy in the primary consumer is not lost to the atmosphere or used by the
consumer itself.
This energy is available for another consumer.
A consumer that eats another consumer for energy:
• Is called a secondary or second order consumer
• May be a carnivore or a herbivore
• May be a predator• May be a scavenger
Most of the energy the secondary consumer gets from the primary
consumer is used by the secondary consumer.
Some of the energy is lost as heat, but some energy is stored and can passed on to another consumer.
A consumer that eats a consumer that already ate a consumer:
• Is called a third order or tertiary consumer
• May be a carnivore or a herbivore
• May be a omnivore• May be a predator• May be a scavenger
Consumers that hunt & kill other consumers are called predators.The animals that are hunted &
killed are called prey.
Consumers that eat producers & other consumers
• Are called omnivores• Omnivores eat plants
and animals
Decomposers
• Decomposers eat dead things and turn them back into dirt, or soil. YUK!
• Examples:– Mushrooms– Worms– Bugs
The transfer of energy from sun to producer to primary consumer to secondary consumer to tertiary consumer can be shown in a
FOOD CHAIN.
Stop…Review…Check…Turn to your partner and tell them the meaning of each
word. Also give two example of each.
• Producers:
• Consumers:
• Decomposers:
On a sheet of note book paper describe the following animals as either a producer, consumer or decomposer. For the consumers, make sure to include if they are a carnivore, herbivore or omnivore. Please use
complete sentences! (Ex: A _____ is a ______.)
1. Bear
2. Shark
3. Rabbit
4. Cherry tree
5. Mushroom
6. Human
7. Tulip (flower)
8. Panther
9. Giraffe
10. Worm
Answer Key
1. Consumer / Omnivore
2. Consumer / Carnivore
3. Consumer / Herbivore
4. Producer
5. Decomposer
6. Consumer / Omnivore
7. Producer
8. Consumer / Carnivore
9. Consumer / Herbivore
10. Decomposer
Energy pyramids show
• That the amount of available energy decreases down the food chain
• It takes a large number of producers to support a small number of primary consumers
• It takes a large number of primary consumers to support a small number of secondary consumers
Food Webs:
• Are interconnected food chains
• They show the feeding relationships in an ecosystem
• EXAMPLE