1. DissolvedOxygen

2. Why dowe care? 3. Because of me 4. Whatlevels area problem? 5. O2 Levels12 mg/l or higher =DEATH (Bubble Disease)O2 Levels1-2 mg/l or lower =DEATH 6. by A ER A TION 7. What canincreasedissolvedoxygen? 8. absorbed by the air 9. produced by aquatic plants 10. But dontforget aboutwatertemperature. 11. O2incs rease decreasesO2 12. And withthat inmind.... 13. What candecreasedissolvedoxygen? 14. lowered by algal blooms 15. How do humans effect dissolvedoxygen levels? Human activity is the leading cause of oxygen depletion. Such activities include Building dams which reduce aeration Dumping organic waste into waterways which increases phosphate and nitrate levels Excessive use of fertilizer.For more information go to:http://peer.tamu.edu/curriculum_modules/Water_Quality/module_3/index.htm 16. Image CitationsSlide 1 Bubbles.jpg by Fergus Ray Murray was used under a Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Generic License(http://www.flickr.com/photos/0olong/57148931/)Slide 2 Care.jpg by Phoenix Dark-Knight was used under a Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Generic License(http://www.flickr.com/photos/chebbs/230238210/)Slide 3 Fish.jpg by Rick Smit was used under a Creative Commons Attribution 2.0 Generic License (http://www.flickr.com/photos/ricksmit/15504803/lightbox/)Slide 4 Level tripod?.jpg by jpstanley was used under a Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Generic License(http://www.flickr.com/photos/jpstanley/32107543/)Side 5 - 2-Way Traffic by J Heffner was used under a Creative Commons Attribution 2.0 Generic License (http://www.flickr.com/photos/civisi/2611679744/)Slide 6 Hot air balloons.jpg by emmajc was Attribution-NonCommercial-NoDerivs 2.0 Generic License (http://www.flickr.com/photos/em/19152964/)Slide 7 Lake Louise by Nate Eagleson is used under a Creative Commons Attribution 2.0 Generic License (http://www.flickr.com/photos/nateeag/4745229944/)Slide 8 Bubble inside Elodea Flower by Luis Parravicini is used under a Creative Commons Attribution 2.0 Generic License (http://www.flickr.com/photos/xrm0/2136218364/)Slide 9 - Black and White Water Falls.jpg by Graham Dean is used under a Creative Commons Attribution-ShareAlike 2.0 Generic License (http://www.flickr.com/photos/britanglishman/3694225737/)Slide 10 - : thermometer.jpg by Duncan Hull is used under a Creative Commons Attribution 2.0 Generic License(http://www.flickr.com/photos/dullhunk/5449178956/)Slide 11 (top) Ice Water.jpg by D Sharon Pruitt was used under a Creative Commons Attribution 2.0 Generic License(http://www.flickr.com/photos/pinksherbet/5685106294/)(bottom) Boil Water.jpg by Luigi Anzivino was used under a Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Generic License(http://www.flickr.com/photos/ilmungo/60154176/)Slide 12 - Do you find my brain?.jpg by Daniela Hartmann under a Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Generic License(http://www.flickr.com/photos/29487767@N02/2845044715/)Slide 13 Drain.jpg by Neil R is used under a Creative Commons Attribution-NonCommercial 2.0 Generic License(http://www.flickr.com/photos/islespunkfan/2629078494/)Slide 14 - Algae bloom in a small farm pond by Soil Science is used under a Creative Commons Attribution 2.0 Generic License(http://www.flickr.com/photos/soilscience/5084241721/)