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it is the amount of suspended particles in the water (FTU)
turbidity
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why will turbid water cause less photosynthesis in the waterway?
the more turbid water there is, the less photosynthesis there is in the waterway because it blocks sunlight
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the amount of salt is in the water
salinity
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example of area with high salinity and low salinity
- ocean - high salinity
- river -low salinity
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used as a indicator species to detect cont. water supplies b/c it's found in human/animal feces
E. Coli Bacteria
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-it is a method used by scientists instead of testing for all types of bacteria
total coliform
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what is the EPA requirement for total coliform?
one colony of bacteria per 100 mL is unsafe to drink
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-oxygen in water
dissolved oxygen
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what is a healthy level for DO?
DO > 8 ppm
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what is considered oxygen poor water?
DO < 2 ppm, only supports detritivores
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how is oxygen placed in the water? removed?
- respiration - removed
- photosynthesis - placed
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organisms that eat dead organic matter (dead leaves, algae, etc)
examples of these organisms?
- detritivores!
- land: termites, fungus
- water: shrimp (turds of the ocean), worms, snails(dead stuff at bottom)
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-demand for oxygen that detritivores place on system
biological oxygen demand
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how are nitrates added into a waterway?
nitrates are added into a waterway through fertilizer and manure runoff
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High nitrates in ground water result in decreased oxygen carrying capactiy of hemoglobin in babies and may result in death
blue baby syndrome
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controlling eutrophication
- -use phosphate free detergents
- -wash your car at a car wash, not on curb. car washes required to recyle water and wasterwater undergoes treatment
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steps of eutrophication
- 1. nutrients (NO3 and PO4) are added to water
- 2. increase in nutrients cause an algae bloom
- 3. as bloom progresses, algae begins to die
- 4. organic material accumulates on bottom of lake
- 5. material supports a boom in detritivore populations
- 6. detritivores rapidly rob lake/river of its oxygen, suffocating most orgs (like fish)
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