Chapter 28 - Chapter 28 Chapter Ecosystems 28 Ecology...

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Chapter 28 Chapter 28 Ecosystems
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28 Ecology Ecology : An ecologist studies relationships Environment consists of: Biotic component: Abiotic (non-living):
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28 Ecology Ecosystem : Eastern deciduous forest, Chesapeake Bay, Northern tundra, Great Barrier Reef. Community : Ex: plants, mice, deer ticks, moths, bacteria
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28 Populations Population: Natural populations show patterns of change in sizes through time Some changes in population size caused by: Shifts in environmental factors interaction between species
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28 How Ecosystems Work Molecules: chemical building blocks - Solar Energy
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28 Laws of Ecosystem Function 1. Energy moves through communities 1. Nutrients constantly cycle & recycle
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28 Energy Flow Through Communities Energy enters communities -Sun -Tiny fraction of energy reaches Earth as electromagnetic waves Much of the energy that reaches the Earth reflected Photosynthetic organisms capture 3% or less Life on planet supported by less than 0.03% of energy reaching Earth from the sun
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28 Energy Flow Through Communities Photosynthesis Solar energy
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28 Autotrophs (producers) – plants, diatoms, some protozoans Heterotrophs (consumers) – animals
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This note was uploaded on 02/01/2011 for the course BIOLOGY 1104 taught by Professor Dr.dianeday during the Summer '10 term at Georgia State University, Atlanta.

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Chapter 28 - Chapter 28 Chapter Ecosystems 28 Ecology...

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