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Lecture 11: Dendrochemistry & Isotopes

Lecture 11: Dendrochemistry & Isotopes. Dendrochemistry. Can be used to examine the chemical concentration in rings Air Pollution Groundwater Contamination Bioremediation. Problems With Dendrochemistry. Translocation Easy to Contaminate Have to sample and prepare in a clean environment

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Lecture 11: Dendrochemistry & Isotopes

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  1. Lecture 11: Dendrochemistry & Isotopes

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

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

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

  5. Isotope Analysis

  6. Fractionation Example 18O/16O in Precipitation • Controls • Rain-out • Temperature • Amount • Source Area (Anderson et al. 2003 after Siegenthaler, 1979)

  7. 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)

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

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

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

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