1. PHOSPHATE IN LAKES AND STREAMS

2. 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

3. P IN STRATIFIED LAKES

5. TOTAL P AND CHLOROPHYLL

6. NUTRIENT PROFILES OF THE RIFT LAKES
SRP= Soluble Reactive Phosphate

7. PHOSPHATE CYCLE

8. RED MUD – BLACK MUD

9. P AT SEDIMENT – WATER INTERFACE

10. Chambers oxygenated
Chambers anoxic

11. Conditions 30cm from bottom in 14M deep lake.

12. SULFATE REDUCING BACTERIA AND RELEASE OF PHOSPHATE

13. EPIPELIC ALGAE, PH & PHOSPHATE

14. MACROPHYTES PUMPING P FROM SEDIMENT TO WATER COLUMN

15. FORMS OF P IN THE EPILIMNION

16. CALCITE AND P ADSORPTION

18. ANTHROPOGENIC SOURCES

19. PHOSPHORUS AND LAKE 226

20. P AND PRIMARY PRODUCTION

22. 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

23. NUTRIENT LOADING WATERSHED AREA AREAL INPUT RATE FLUSHING RATE
EXTENT OF MIXING

25. SOURCES FOR NUTRIENT LOADING IN CHESAPEAKE BAY

26. POINT-SOURCE DECLINE IN PHOSPHATE LOADING IN CHESAPEAKE BAY

27. LAKE POWELL AND LAKE MEADE

29. MISSISSIPPI RIVER

30. LAKE PONCHARTRAIN

31. LAKE PONCHARTRAIN

32. LAKE ERIE