PHOSPHATE IN LAKES AND STREAMS. PHOSPHORUS IN SURFACE WATER PARTICULATE PHOSPHORUS In living things...
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Transcript of PHOSPHATE IN LAKES AND STREAMS. PHOSPHORUS IN SURFACE WATER PARTICULATE PHOSPHORUS In living things...
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PHOSPHATE IN LAKES AND STREAMS
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PHOSPHORUS IN SURFACE WATER
• PARTICULATE PHOSPHORUS• In living things• In minerals or adsorbed to clays, etc.• Adsorbed to dead organics
• DISSOLVED PHOSPHORUS• Orthophosphates• Polyphosphates• Organic molecules with phosphorus• Esters of phosphate
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P IN STRATIFIED LAKES
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TOTAL P AND CHLOROPHYLL
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NUTRIENT PROFILES OF THE RIFT LAKESSRP= Soluble Reactive Phosphate
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PHOSPHATE CYCLE
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RED MUD – BLACK MUD
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P AT SEDIMENT – WATER INTERFACE
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Chambers oxygenated
Chambers anoxic
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Conditions 30cm from bottom in 14M deep lake.
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SULFATE REDUCING BACTERIA AND RELEASE OF PHOSPHATE
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EPIPELIC ALGAE, PH & PHOSPHATE
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MACROPHYTES PUMPING P FROM SEDIMENT TO WATER COLUMN
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FORMS OF P IN THE EPILIMNION
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CALCITE AND P ADSORPTION
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ANTHROPOGENIC SOURCES
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PHOSPHORUS AND LAKE 226
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P AND PRIMARY
PRODUCTION
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PRODUCTIVITY AND TOTAL PHOSPHORUS
LEVEL OF PRODUCTIVITY TOTAL P (µg/L)
ULTRA OLIGOTROPHIC <5
OLIGO MESOTROPHIC 5-10
MESO EUTROPHIC 10-30
EUTROPHIC 30-100
HYPEREUTROPHIC >100
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NUTRIENT LOADING
• WATERSHED AREA• AREAL INPUT RATE• FLUSHING RATE• EXTENT OF MIXING
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SOURCES FOR NUTRIENT LOADING IN CHESAPEAKE BAY
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POINT-SOURCE DECLINE IN PHOSPHATE LOADING IN CHESAPEAKE BAY
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LAKE POWELL AND LAKE MEADE
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MISSISSIPPI RIVER
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LAKE PONCHARTRAIN
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LAKE PONCHARTRAIN
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LAKE ERIE
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