Chapter 2 Section 3 Chapter 2 Section 3 Review Page 42Review Page 42

EcologyEcology

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Define ecosystemDefine ecosystem:: A community of organisms and their abiotic A community of organisms and their abiotic

environment.environment.

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Explain why the entire biosphere is an Explain why the entire biosphere is an ecosystemecosystem.. The biosphere sustains organisms that interact and The biosphere sustains organisms that interact and

affect each other, providing an environment for all affect each other, providing an environment for all of them.of them.

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Identify three factors that control the Identify three factors that control the balance of an ecosystem.balance of an ecosystem. How matter and energy cycle through the How matter and energy cycle through the

ecosystemecosystem How ecosystems respond to changeHow ecosystems respond to change How organisms in the ecosystem interactHow organisms in the ecosystem interact

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Summarize how energy is transferred Summarize how energy is transferred between the sun and consumers in an between the sun and consumers in an ecosystem.ecosystem. Plants photosynthesize the suns energy into Plants photosynthesize the suns energy into

carbohydratescarbohydrates Consumers (animals) eat the plantsConsumers (animals) eat the plants Higher-level consumers (bigger animals) eat the Higher-level consumers (bigger animals) eat the

smaller animalssmaller animals Decomposers eat the consumers remains Decomposers eat the consumers remains

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Describe one way that ecosystems respond Describe one way that ecosystems respond to environmental changeto environmental change.. Ecosystems will generally respond to change in a Ecosystems will generally respond to change in a

way that restores balance within the ecosystemway that restores balance within the ecosystem

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Compare a food chain with a food web.Compare a food chain with a food web. Food chain: A sequence in which an organism is Food chain: A sequence in which an organism is

consumed by another organismconsumed by another organism Food web: MORE COMPLEX Several organisms Food web: MORE COMPLEX Several organisms

feed upon one type of organism, which are feed upon one type of organism, which are consumed by still other organisms that compete consumed by still other organisms that compete with each other. with each other.

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Summarize the importance of good Summarize the importance of good stewardship of Earth’s resources.stewardship of Earth’s resources. Good stewardship helps maintain balance within Good stewardship helps maintain balance within

and between ecosystems, which helps to ensure and between ecosystems, which helps to ensure their health and productivitytheir health and productivity

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Discuss two ways that the expansion of Discuss two ways that the expansion of urban area (cities) might be harmful to urban area (cities) might be harmful to nearby ecosystems.nearby ecosystems. Removes vegetation that helps hold topsoil in Removes vegetation that helps hold topsoil in

place, otherwise leading to soil erosionplace, otherwise leading to soil erosion Water pollution from street runoff effects the water Water pollution from street runoff effects the water

suppliessupplies Animals may flee, disturbing neighboring Animals may flee, disturbing neighboring

ecosystemsecosystems

The End ???The End ???