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Dendrochronology pow pt acloutier 2012

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Dendrochronology pow pt acloutier 2012

  1. 1. Dendrochronology by Annie Cloutier 2012 copyright the science of studying growth rings of a tree to determine past conditions 1
  2. 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. 3. The last Ice Age 3
  4. 4. When a core is drilled from a living tree, or, the tree is cut down, the inside of the tree is visible. We can read the life of the tree and the events of climate change, 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. 5. Measuring the growth of early wood to late wood rings equals an annual tree year 5
  6. 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. 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. 8. Meiosis in trees `http://www.youtube.com/watch?v=D9byVQxvMXs the process of two sequential nuclear and cellular divisions resulting in four haploid cells from a single diploid cell:this occurs in reproductive organs such as pollen and ovules in coniferous trees 8
  9. 9. Mitosis http://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. 10. Clones are genetically identical organisms Spider plant plantlet was a clone of parent Spider plant Coleus cutting will make a clone of parent plant 10
  11. 11. http://www.youtube.com/watch?v=Q6ucKWIIFmg the end is just another beginning some where in nature 11

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