Chapter 3: How Ecosystems Work Section 3.1: Energy Flow in Ecosystems.
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Transcript of Chapter 3: How Ecosystems Work Section 3.1: Energy Flow in Ecosystems.
![Page 1: Chapter 3: How Ecosystems Work Section 3.1: Energy Flow in Ecosystems.](https://reader036.fdocuments.net/reader036/viewer/2022082613/5697bfc81a28abf838ca833a/html5/thumbnails/1.jpg)
Chapter 3: How Ecosystems Work
Section 3.1: Energy Flow in Ecosystems
![Page 2: Chapter 3: How Ecosystems Work Section 3.1: Energy Flow in Ecosystems.](https://reader036.fdocuments.net/reader036/viewer/2022082613/5697bfc81a28abf838ca833a/html5/thumbnails/2.jpg)
Life depends on the sun.
Plants, algae, and some types of bacteria
capture solar energy and store it as food.
![Page 3: Chapter 3: How Ecosystems Work Section 3.1: Energy Flow in Ecosystems.](https://reader036.fdocuments.net/reader036/viewer/2022082613/5697bfc81a28abf838ca833a/html5/thumbnails/3.jpg)
Almost all organisms get their energy from
the sun.
![Page 4: Chapter 3: How Ecosystems Work Section 3.1: Energy Flow in Ecosystems.](https://reader036.fdocuments.net/reader036/viewer/2022082613/5697bfc81a28abf838ca833a/html5/thumbnails/4.jpg)
Organisms that are able to make their own food are
called producers.
![Page 5: Chapter 3: How Ecosystems Work Section 3.1: Energy Flow in Ecosystems.](https://reader036.fdocuments.net/reader036/viewer/2022082613/5697bfc81a28abf838ca833a/html5/thumbnails/5.jpg)
Producers are also called autotrophs.
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Another type of organism found in the ecosystem is
the consumer.
Consumers are organisms that get their energy by eating other
organisms.
![Page 7: Chapter 3: How Ecosystems Work Section 3.1: Energy Flow in Ecosystems.](https://reader036.fdocuments.net/reader036/viewer/2022082613/5697bfc81a28abf838ca833a/html5/thumbnails/7.jpg)
Consumers are also called heterotrophs.
![Page 8: Chapter 3: How Ecosystems Work Section 3.1: Energy Flow in Ecosystems.](https://reader036.fdocuments.net/reader036/viewer/2022082613/5697bfc81a28abf838ca833a/html5/thumbnails/8.jpg)
Four types of consumers
•1. Herbivores•2. Carnivores•3. Omnivores•4. Decomposers
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Herbivores are consumers that eat
only producers.
![Page 10: Chapter 3: How Ecosystems Work Section 3.1: Energy Flow in Ecosystems.](https://reader036.fdocuments.net/reader036/viewer/2022082613/5697bfc81a28abf838ca833a/html5/thumbnails/10.jpg)
Carnivores are consumers that eat
only consumers.
![Page 11: Chapter 3: How Ecosystems Work Section 3.1: Energy Flow in Ecosystems.](https://reader036.fdocuments.net/reader036/viewer/2022082613/5697bfc81a28abf838ca833a/html5/thumbnails/11.jpg)
Omnivores are consumers that eat both consumers
and producers.
![Page 12: Chapter 3: How Ecosystems Work Section 3.1: Energy Flow in Ecosystems.](https://reader036.fdocuments.net/reader036/viewer/2022082613/5697bfc81a28abf838ca833a/html5/thumbnails/12.jpg)
Decomposers are consumers that get
their food by breaking down
dead organisms.
![Page 13: Chapter 3: How Ecosystems Work Section 3.1: Energy Flow in Ecosystems.](https://reader036.fdocuments.net/reader036/viewer/2022082613/5697bfc81a28abf838ca833a/html5/thumbnails/13.jpg)
Consumers get their energy from food by the process called
cellular respiration.
Cellular respiration is the process of breaking down
food to yield energy.
![Page 14: Chapter 3: How Ecosystems Work Section 3.1: Energy Flow in Ecosystems.](https://reader036.fdocuments.net/reader036/viewer/2022082613/5697bfc81a28abf838ca833a/html5/thumbnails/14.jpg)
Each time one organism eats another organism, a transfer of energy occurs.
![Page 15: Chapter 3: How Ecosystems Work Section 3.1: Energy Flow in Ecosystems.](https://reader036.fdocuments.net/reader036/viewer/2022082613/5697bfc81a28abf838ca833a/html5/thumbnails/15.jpg)
We can trace the paths energy follows as it travels through an
ecosystem by studying food chains, food webs,
and trophic levels.
![Page 16: Chapter 3: How Ecosystems Work Section 3.1: Energy Flow in Ecosystems.](https://reader036.fdocuments.net/reader036/viewer/2022082613/5697bfc81a28abf838ca833a/html5/thumbnails/16.jpg)
A food chain is a sequence in which energy is
transferred from one organism to the next as
each organism eats another.
![Page 17: Chapter 3: How Ecosystems Work Section 3.1: Energy Flow in Ecosystems.](https://reader036.fdocuments.net/reader036/viewer/2022082613/5697bfc81a28abf838ca833a/html5/thumbnails/17.jpg)
A food web shows many of the feeding relationships
in an ecosystem.
![Page 18: Chapter 3: How Ecosystems Work Section 3.1: Energy Flow in Ecosystems.](https://reader036.fdocuments.net/reader036/viewer/2022082613/5697bfc81a28abf838ca833a/html5/thumbnails/18.jpg)
Trophic levels are each step in the transfer of
energy through an ecosystem.
![Page 19: Chapter 3: How Ecosystems Work Section 3.1: Energy Flow in Ecosystems.](https://reader036.fdocuments.net/reader036/viewer/2022082613/5697bfc81a28abf838ca833a/html5/thumbnails/19.jpg)
Each trophic level consumes 90 percent of the energy present – only 10 percent is passed onto
the next level.