Food Chains and Food Webs Energy Flow in Nature. Energy Roles An organisms energy role in an...
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Transcript of Food Chains and Food Webs Energy Flow in Nature. Energy Roles An organisms energy role in an...
![Page 1: Food Chains and Food Webs Energy Flow in Nature. Energy Roles An organisms energy role in an ecosystem may be that of a producer, consumer, or decomposer.](https://reader035.fdocuments.in/reader035/viewer/2022062619/551577d755034674578b5231/html5/thumbnails/1.jpg)
Food Chains and Food Webs
Energy Flow in Nature
![Page 2: Food Chains and Food Webs Energy Flow in Nature. Energy Roles An organisms energy role in an ecosystem may be that of a producer, consumer, or decomposer.](https://reader035.fdocuments.in/reader035/viewer/2022062619/551577d755034674578b5231/html5/thumbnails/2.jpg)
Energy Roles
•An organism’s energy role in an ecosystem may be that of a producer, consumer, or decomposer.
![Page 3: Food Chains and Food Webs Energy Flow in Nature. Energy Roles An organisms energy role in an ecosystem may be that of a producer, consumer, or decomposer.](https://reader035.fdocuments.in/reader035/viewer/2022062619/551577d755034674578b5231/html5/thumbnails/3.jpg)
Producers
•An organism that can make its own food is a producer.
•Autotroph•Source of all food in an
ecosystem.•Capture energy from
sunlight and stores it as food energy.
![Page 4: Food Chains and Food Webs Energy Flow in Nature. Energy Roles An organisms energy role in an ecosystem may be that of a producer, consumer, or decomposer.](https://reader035.fdocuments.in/reader035/viewer/2022062619/551577d755034674578b5231/html5/thumbnails/4.jpg)
Consumers
• Consumers are heterotrophs, or living things that cannot make food for themselves.
• A food chain contains several kinds of consumers, each of which occupies a different trophic level.
• Herbivore, carnivores, omnivores
![Page 5: Food Chains and Food Webs Energy Flow in Nature. Energy Roles An organisms energy role in an ecosystem may be that of a producer, consumer, or decomposer.](https://reader035.fdocuments.in/reader035/viewer/2022062619/551577d755034674578b5231/html5/thumbnails/5.jpg)
Consumer Tropic Levels
• Primary consumers eat producers (herbivores)
• Secondary consumers eat primary consumers (carnivores)
• Tertiary consumers eat secondary consumers (carnivores)
• Scavengers are carnivores that feed on the bodies of dead organisms.
![Page 6: Food Chains and Food Webs Energy Flow in Nature. Energy Roles An organisms energy role in an ecosystem may be that of a producer, consumer, or decomposer.](https://reader035.fdocuments.in/reader035/viewer/2022062619/551577d755034674578b5231/html5/thumbnails/6.jpg)
Decomposers
•Help break down wastes and dead organisms and return the raw materials to the environment
•Bacteria and fungi
![Page 7: Food Chains and Food Webs Energy Flow in Nature. Energy Roles An organisms energy role in an ecosystem may be that of a producer, consumer, or decomposer.](https://reader035.fdocuments.in/reader035/viewer/2022062619/551577d755034674578b5231/html5/thumbnails/7.jpg)
Food Chains•Series of events where one organism eats another and obtains energy.
•First organism in chain is the producer.
•The second organism is the consumer that eats the producer.
![Page 8: Food Chains and Food Webs Energy Flow in Nature. Energy Roles An organisms energy role in an ecosystem may be that of a producer, consumer, or decomposer.](https://reader035.fdocuments.in/reader035/viewer/2022062619/551577d755034674578b5231/html5/thumbnails/8.jpg)
Plankton—Crab—Seal—Orca
This is only one possible chain in a marine ecosystem.
![Page 9: Food Chains and Food Webs Energy Flow in Nature. Energy Roles An organisms energy role in an ecosystem may be that of a producer, consumer, or decomposer.](https://reader035.fdocuments.in/reader035/viewer/2022062619/551577d755034674578b5231/html5/thumbnails/9.jpg)
Come up with an example to fill in the blocks of a food chain in two different ecosytems.
![Page 10: Food Chains and Food Webs Energy Flow in Nature. Energy Roles An organisms energy role in an ecosystem may be that of a producer, consumer, or decomposer.](https://reader035.fdocuments.in/reader035/viewer/2022062619/551577d755034674578b5231/html5/thumbnails/10.jpg)
Food Webs•Consists of many overlapping food chains in an ecosystem.
•Some organisms may play more than one role by changing consumer levels.
![Page 11: Food Chains and Food Webs Energy Flow in Nature. Energy Roles An organisms energy role in an ecosystem may be that of a producer, consumer, or decomposer.](https://reader035.fdocuments.in/reader035/viewer/2022062619/551577d755034674578b5231/html5/thumbnails/11.jpg)
What happens in a food web if one or more of the
organisms disappear?
![Page 12: Food Chains and Food Webs Energy Flow in Nature. Energy Roles An organisms energy role in an ecosystem may be that of a producer, consumer, or decomposer.](https://reader035.fdocuments.in/reader035/viewer/2022062619/551577d755034674578b5231/html5/thumbnails/12.jpg)
Which animals are carnivores and herbivores?
![Page 13: Food Chains and Food Webs Energy Flow in Nature. Energy Roles An organisms energy role in an ecosystem may be that of a producer, consumer, or decomposer.](https://reader035.fdocuments.in/reader035/viewer/2022062619/551577d755034674578b5231/html5/thumbnails/13.jpg)
Energy Pyramids
•A diagram that shows the amount of energy that moves from one feeding level to another in a food web.
•Represented in a triangle with the most energy at the producer level.
![Page 14: Food Chains and Food Webs Energy Flow in Nature. Energy Roles An organisms energy role in an ecosystem may be that of a producer, consumer, or decomposer.](https://reader035.fdocuments.in/reader035/viewer/2022062619/551577d755034674578b5231/html5/thumbnails/14.jpg)
Energy Loss and Use
•10% of energy transferred to next higher level.
•90% of energy is used by organisms’ life processes.
•Due to energy loss, ecosystem cannot support many feeding levels.