ENERGY FLOW THROUGH ECOSYSTEMS Spring 2012 ENERGY FLOW
- Slides: 20
ENERGY FLOW THROUGH ECOSYSTEMS Spring 2012
ENERGY FLOW THROUGH ECOSYSTEMS All organisms MUST obtain and use energy…
ENERGY ROLES (JOBS) IN ECOSYSTEMS Each organism in an ecosystem has a role or niche. Producer’s Role – make their own food through photosynthesis, convert the Sun’s energy to make glucose, provide food for 1 st and 3 rd level consumers. Examples: Any plant… Grasses, shrubs, trees, algae… etc.
ENERGY ROLES (JOBS) IN ECOSYSTEMS 1 st Level Consumer (Herbivores) Role-must consume another organism to obtain energy, ONLY CONSUME PLANTS, provide food for 2 nd and 3 rd level consumers. Examples: Deer, rabbits, rodents (mice, rats, squirrels), insects, herbivorous birds, etc.
ENERGY ROLES (JOBS) IN ECOSYSTEMS 2 nd Level Consumer (Carnivores) Role-must consume another organism to obtain energy, ONLY CONSUME OTHER CONSUMERS, provide food for 3 rd level consumers. Examples: snakes, foxes, predatory birds, jellyfish etc.
ENERGY ROLES (JOBS) IN ECOSYSTEMS 3 rd Level Consumer (Omnivores and Large Carnivores) Role-must consume another organism to obtain energy, CONSUMES OTHER CONSUMERS and/or PRODUCERS, provide food for scavengers. Examples: Humans, lions, bears, sharks, whales.
ENERGY ROLES (JOBS) IN ECOSYSTEMS Scavenger’s Role-must consume another organism to obtain energy, CONSUMES DEAD ANIMAL REMAINS, provide food for other scavengers. Examples: Hyenas, buzzards, flies, snails.
ENERGY ROLES (JOBS) IN ECOSYSTEMS Decomposer’s Role-must consume another organism to obtain energy, BREAK DOWN DEAD PLANT AND ANIMAL REMAINS, provide food other organisms. Examples: fungi, bacteria, earthworms, .
ENERGY ROLES (JOBS) IN ECOSYSTEMS § Bacteria: are decomposers that break down animal remains. § Fungus: are decomposers that break down plant remains. § Role for BOTH: returns materials to the soil, clean up the environment
ENERGY FLOW § Food Chains: shows ONE possible path for the flow of energy for a particular organism in an ecosystem. § Rules: A. Must start with producers to 1 st level consumer to 2 nd , and so on. B. Must use arrows to show the direction of energy flow. Organism that is eaten Organism that is eating
FOOD CHAIN EXAMPLES
ENERGY FLOW Food Web: Many overlapping food chains in an ecosystem. § Shows relationships & dependencies to others. Rules: A. Must start with producers to 1 st level consumer to 2 nd , and so on. B. Must use arrows to show the direction of energy flow (arrows may overlap).
FOOD WEB EXAMPLE
ENERGY FLOW Energy Pyramids: Shows the flow of energy in a food chain with LESS energy as each level goes up. Rules: A. Producers go on the bottom, 3 rd level consumer on top. B. Must have more producers than 1 st level consumers, more 1 st than 2 nd , more 2 nd than 3 rd , etc.
ENERGY PYRAMID
TWO TYPES OF ORGANISMS Autotrophs: Organisms that can make their own food. (Producers) Heterotrophs: Organisms that cannot make their own food, they must consume. (Consumers, Scavengers, Decomposers)
- How does energy move through most ecosystems on earth
- Chapter 4 lesson 2 energy flow in ecosystems answer key
- Energy in ecosystems lesson 3 answer key
- Flow of energy
- Primary consumer definition
- Section 1 energy flow in ecosystems
- Bae yong-kyun
- How seasons work
- Section 3 energy in ecosystems
- Chapter 42 ecosystems and energy
- Energy flow trophic levels
- Phosphorus cycle
- Lab food chains and energy in ecosystems
- Energy transfer in ecosystems
- Ecosystem definition class 6
- How does energy flow through an ecosystem
- Energy flow through an ecosystem
- How does energy flow through an ecosystem
- What ecological role best describes grizzly bears?
- Ecological succession
- Oikos meaning