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energy succession

energy succession - Today's Topics Trophic levels and how...

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Today’s Topics Trophic levels and how energy flows through ecosystems. The effects of disturbances. Succession
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Energy Flow through an Ecosystem Solar energy and precipitation drive ecosystem processes. Where is the greatest amount of energy lost? 5%
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Ecosystems based on Earth’s surface area.
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Measurements of Primary Production in Different Ecosystems based on grams per m 2 per year
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Measurements of Primary Production in Different Ecosystems based on percentage.
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Primary Productivity is based on variations in temperature and water availability.
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Energy continually flows through an ecosystem but dissipates over time. Energy does not recycle.
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Each level in a food chain is a trophic level. ( troph- nourishment ) Food web: All the food chains of an ecosystem.
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Ecosystems can be described using the total number of organisms at each trophic level.
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Ecosystems can be described by measuring the dry weight of organisms at each trophic level.
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Figure 55.8 Pyramids of Biomass and Energy
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In aquatic communities the pyramid of mass may be inverted. WHY?
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