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Spatial Variability of Aspen Bark Chlorophyll Content In the Winter

Spatial Variability of Aspen Bark Chlorophyll Content In the Winter. Justin Burman, EBIO 4100, Spring 2011. Winter Ecology Mountain Research Station University of Colorado, Boulder. Introduction. Colorado’s aspen trees. Why are they cool?. (  trekkerphoto.com ). How are they Special?.

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Spatial Variability of Aspen Bark Chlorophyll Content In the Winter

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  1. Spatial Variability of Aspen Bark Chlorophyll Content In the Winter • Justin Burman, EBIO 4100, Spring 2011 Winter Ecology Mountain Research Station University of Colorado, Boulder

  2. Introduction Colorado’s aspen trees Why are they cool? ( trekkerphoto.com)

  3. How are they Special? Live in the sub alpine Deciduous Share a common root structure Winter photosynthesis in their bark

  4. Chlorophyl In the Bark What induces the chlorophyl with in the bark and why? Does chlorophyl content in the bark of Aspen trees differ within the winter depending on available sunlight? (Barr and Potter, 1974) Prior studies indicated bark chlorophyl content is relative to age (Barr and Potter, 1974)

  5. Why is This Important Better understand Species Loss in Bio Mass • Potential for New habitat

  6. Hypothesis • If winter chlorophyl production within Populus tremuloides is dependent on photoperiod than the aspect of the tree will also affect the amount of chlorophyl produced.

  7. Location

  8. Methods Visually documented trees on Northerly and Southerly aspects Take photographs of trees When selecting location and specific trees I paid special attention to; elevation temperature size of tree

  9. Methods

  10. Results

  11. Discussion Is aspect related to Chlorophyl concentration? Is it more closely related to the thickness of a stand? • Potential flaws Other variables Human error

  12. Conclusion • Not significantly related to aspect Other shading factors appear to be more influential. Any other Questions?

  13. Resources Marchand, Peter. Life in the Cold. University Press of New England, 1996 • Halfpenny, James. Winter An Ecological Handboobook. Johnson Publishing, Boulder, CO. 1989 Barr, M. Potter, L. Chlorophylis and Carotenoids in Aspen Bark (Populus tremuloides). The Southwestern Naturalist, Vol. 19, No. 2 (Jul. 26, 1974), pp. 147-154

  14. My Study

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