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The Mystery of the Disappearing Lake

The Mystery of the Disappearing Lake. http://tncweeds.ucdavis.edu/photos/phrau05.jpg. Phragmites austalis. http://www.forestryimages.org/images/768x512/5241087.jpg. Phragmites. http://www.ucmp.berkeley.edu/IB181/VPL/Ana/AnaP/Ana22l.jpeg. Phragmites. Stomata.

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The Mystery of the Disappearing Lake

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  1. The Mystery of the Disappearing Lake

  2. http://tncweeds.ucdavis.edu/photos/phrau05.jpg

  3. Phragmites austalis http://www.forestryimages.org/images/768x512/5241087.jpg

  4. Phragmites http://www.ucmp.berkeley.edu/IB181/VPL/Ana/AnaP/Ana22l.jpeg

  5. Phragmites Stomata http://www.ucmp.berkeley.edu/IB181/VPL/Ana/AnaP/Ana22l.jpeg

  6. Phragmites

  7. Phragmites Water loss

  8. Transpiration

  9. Phragmites Transpiration Water uptake through roots Water uptake through roots

  10. So… why is transpiration higher in Phragmites than native species?

  11. So… why is transpiration higher in Phragmites than native species? • Stem density

  12. So… why is transpiration higher in Phragmites than native species? • Stomatal density Stomata

  13. So… why is transpiration higher in Phragmites than native species? • Stomatal regulation

  14. So… why is transpiration higher in Phragmites than native species? • Dense root system

  15. Detritus: Another piece of the puzzle • Detritus is dead organic material from plants or animals • Detritus from Phragmites is very slow to degrade • Why might that cause the lake to get smaller?

  16. Detritus: Another piece of the puzzle • As detritus accumulates it starts to fill in the lake and raise the level of the land above the water level

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