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Figure
22
WATER QUALITY
IMPACTS ASSOCIATED WITH EUTROPHICATION
- Noxious
algae
(scums, blue-greens, taste and odor, visual)
- Excessive
macrophyte growth (loss of open water)
- Loss
of clarity (secchi depth goes down)
- Possible
loss of macrophytes
(via light limitation by algae and periphyton)
- Low dissolved
oxygen (loss of habitat for fish and fish food)
- Excessive
organic
matter production (smothering eggs and bugs)
- Blue-green
algae inedible by some zooplankton (reduced food
chain efficiency)
- "Toxic"
gases (ammonia, H2S) in bottom water (more loss of fish
habitat)
- Possible
toxins from some species of blue-green algae
- Chemical
treatment by lakeshore homeowners or managers may result (copper,
diquat, 2,4-D, etc.)
- Drinking
water degradation from treatment disinfection byproducts
- Carcinogens,
such as chloroform (from increased organic matter reacting with disinfectants
like chlorine)
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