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Dendrochronology pow pt acloutier 2012
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Tree's Hold Climate,Weather, and Earth History Dendrochronology >tree rings

Tree's Hold Climate,Weather, and Earth History Dendrochronology >tree rings

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Dendrochronology pow pt acloutier 2012 Presentation Transcript

  • 1. Dendrochronology by Annie Cloutier 2012 copyrightthe science of studying growth rings of a tree to determine past conditions 1
  • 2. Trees quietly hold Earth’s secrets... forest fires forestfire-hutto.jpg 382×287 pixels floods droughts 701.jpg 480×516 pixels meteorites meteor-strike.jpg 1,024×768 pixels volcanic explosions Ice Ages 2
  • 3. The last Ice Age 3
  • 4. When a core is drilled from a living tree, or, the tree is cut down, the insideof the tree is visible. We can read the life of the tree and the events of climatechange, fires and even how brightly the sun shone. http://www.youtube.com/watch? v=TfZnp09lkHk&feature=related New Zealand University of Aukland Dr. Gretel Boswjik 4
  • 5. Measuring the growth of early woodto late wood rings equals an annual tree year 5
  • 6. What does a tree need to live ? sunlight -> photons of solar energy for photosynthesis water water soluble minerals and elements temperatures for the tree’s zone 6
  • 7. Processes necessary for a tree to grow photosynthesis cell meiosis cell mitosis WATER is a key component in cells being able to divide and multiply 7
  • 8. Meiosis in trees`http://www.youtube.com/watch?v=D9byVQxvMXsthe process of two sequential nuclearand cellular divisions resulting in fourhaploid cells from a single diploidcell:this occurs in reproductive organssuch as pollen and ovules in coniferoustrees 8
  • 9. Mitosishttp://www.youtube.com/watch? the nuclear division of somatic cells resulting in two genetically identical daughter nuclei nuclear is having a nucleus in center somatic cells are a body cell other than sex cells containing at least two sets of chromosomes inherited by both parents 9
  • 10. Clones are genetically identical organismsSpider plant plantlet was a clone ofparent Spider plantColeus cutting will make a clone ofparent plant 10
  • 11. http://www.youtube.com/watch?v=Q6ucKWIIFmgthe end is just another beginning somewhere in nature 11