Lecture 11: Dendrochemistry

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Lecture 11 Dendrochemistry Isotopes
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Dendrochemistry

• Can be used to examine the chemical concentration
  in rings
• Air Pollution
• Groundwater Contamination
• Bioremediation

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Problems With Dendrochemistry

• Translocation
• Easy to Contaminate
• Have to sample and prepare in a clean environment
• Time Consuming
• Can be Expensive

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Isotope Analysis

• Used to study the isotopic concentration in rings
• Determine water or carbon source
• Examine tree source area

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Isotope Analysis
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Fractionation
Example 18O/16O in Precipitation

• Controls
• Rain-out
• Temperature
• Amount
• Source Area

(Anderson et al. 2003 after Siegenthaler, 1979)
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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)
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Stomata - Picea abies
(Anderson et al. 2003)
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Stomata guard cells - Picea abies
(Anderson et al. 2003)
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Time series data - Vortex lat., Spring Avg.
temp., and tree ring cellulose d18O
(Anderson et al. 2003)
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