1. Lecture 11: Dendrochemistry & Isotopes

2. Dendrochemistry
Can be used to examine the chemical concentration in rings
Air Pollution
Groundwater Contamination
Bioremediation

22. Problems With Dendrochemistry
Translocation
Easy to Contaminate
Have to sample and prepare in a clean environment
Time Consuming
Can be Expensive

23. Isotope Analysis Used to study the isotopic concentration in rings
Determine water or carbon source
Examine tree source area

24. Isotope Analysis

25. Fractionation Controls Example 18O/16O in Precipitation Rain-out
Temperature
Amount
Source Area
(Anderson et al after Siegenthaler, 1979)

26. Controls on the isotopic signature in plants
Oxygen
Precipitation
Temp.
humidity
transpiration
source water
Carbon
CO2 source
water stress
Temp.
humidity
transpiration
limitation
(Anderson et al. 2003)

27. Stomata - Picea abies
(Anderson et al. 2003)

28. Stomata guard cells - Picea abies
(Anderson et al. 2003)

29. Time series data - Vortex lat., Spring Avg.
temp., and tree ring cellulose d18O
(Anderson et al. 2003)