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| June 15, 2010 Post 50 |
| pics for non point pollution |
manure spread on frozen ground when plants aren't actively growing can quickly wash off into nearby creeks |
erosion and siltation also can carry some nutrients into waterways |
blue green algae bloom- some blue greens produce toxins that can sicken livestock and pets if ingested |
filamentous attached algae that grows on rocks also accumulates on shore |
algae also piles up on bottom near shore and rots creating 'dead zones'- here decomposing algae and methane gas are erupting |
dead goby- anaerobic areas favor growth of acutely toxic botulism bacteria |
dead merganser- botulism also kills birds that eat fish with the toxin in their guts |
digester- anaerobic digesters treat manure much as sewage plants deal with human waste |
engine- methane gas can be burned to power a generator as on this dairy farm |
liquid from digester can be applied during growing season for rapid take up and less loss by runoff so manure nutrients stay on the field |