1. The Mystery of the Disappearing Lake

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

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

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

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

13. Phragmites

14. Water loss

15. Transpiration

16. Phragmites Transpiration Water uptake through roots

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

23. Stem density

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

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

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

27. 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?

28. 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