Microsoft PowerPoint - Chapter54

Microsoft PowerPoint - Chapter54 - Ecology: Ecosystem An...

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1 Ecology: Ecology: Ecosystem Ecosystem An ecosystem is a community of organisms and their environment Outline Outline 1. Key concepts 2. The Nature of Ecosystems 3. Structure of Ecosystems 4. Food chains and webs 5. Pyramids 6. Key terms 7. Conclusions Key Concepts: Key Concepts: An ecosystem is an association of organisms and their environment Every ecosystem is an open system, in that it has inputs and outputs of both energy and nutrients Energy flows in only one direction through an ecosystem Each chain in a food web extends in a straight-line sequence from producers through all the consumers
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2 The Nature of Ecosystems The Nature of Ecosystems An ecosystem is a community of organisms and their environment Biotic components: producers and consumers (including decomposers) Nutrients recycle within ecosystems and energy flows through ecosystems (does not recycle) in a regulated fashion Ecosystems have boundaries which may be clearly defined or overlap and continually changing
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This note was uploaded on 05/06/2009 for the course BIO 311 taught by Professor Juliepalmer during the Spring '08 term at University of Texas at Austin.

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Microsoft PowerPoint - Chapter54 - Ecology: Ecosystem An...

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