sw21 - Organisms, Soil, Nitrogen Photoautotrophs Plants,...

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Organisms, Soil, Nitrogen
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Photoautotrophs – Plants, Algae, Cyanobacteria Produce complex organic compounds from carbon dioxide using energy from light . 6CO 2 + 6 H 2 O C 6 H 12 O 6 + 6 O 2 light simple inorganic molecule complex organic compound energy Primary producers – foundation of life
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Heterotrophs Derive energy from consumption of complex organic compounds produced by autotrophs Autotrophs store energy from the sun in carbon compounds (C 6 H 12 O 6 ) Heterotrophs consume these complex carbon compounds for energy carbon compounds (C 6 H 12 O 6 ) autotrophs Heterotrophs Consumers Producers
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Two Types of Heterotrophic Organisms Aerobic Heterotrophs Anaerobic Heterotrophs Both produce energy by transferring electrons from carbon (organic) to an electron acceptor Aerobic Heterotrophs use oxygen to accept electrons Anaerobic Heterotrophs use other elements to accept electrons e.g. Nitrogen, Manganese, Sulfur, Iron
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Aerobic Heterotrophs Anaerobic Heterotrophs C 6 H 12 O 6 C 6 H 12 O 6 O 2 e- N Mn S Fe e- Pseudomonas , Desulfovibrio Bacteria
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Long term flooding can create anaerobic conditions The diffusion of oxygen in water is About 10,000 times slower than in the air O 2 C 6 H 12 O 6 + 6O 2 → 6CO 2 + 6H 2 O O 2 O 2 O 2 O 2 O 2 O 2 O 2 Oxygen becomes depleted anaerobic
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Anaerobic Decomposition of Organic Matter is Much Slower than Aerobic Decomposition
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Organic Matter and South Florida
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"The first and most abiding impression is the utter worthlessness to civilized man, in its present condition, of the entire region." Buckingham Smith 1835 First Survey In 1850, the Swamplands Act Passed South Florida and the Everglades Transferred 20 million acres from federal to state control
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Historical Flow Rainfall in Kissimmee valley overflow Everglades few inches to a few feet in depth and over 100 miles wide Elevation change: inches/mile
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Alteration of Flow
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sw21 - Organisms, Soil, Nitrogen Photoautotrophs Plants,...

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