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Allometry Exercise

Allometry Exercise. GEO 309 Dr. Garver. Assignment. Can we prove a relationship between tree height and trunk diameter? Collect data using clinometers and meter tapes. Start by standardizing our measurement techniques (First week of allometry exercise).

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Allometry Exercise

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  1. Allometry Exercise GEO 309 Dr. Garver

  2. Assignment • Can we prove a relationship between tree height and trunk diameter? • Collect data using clinometers and meter tapes. • Start by standardizing our measurement techniques (First week of allometry exercise).

  3. Allometry Exercise - Part 1(Week 1) In week we formed groups, these groups will work together for the remainder of this unit (3 weeks in length). • Week 1 of exercise – Print out a copy of clinometer_training.xls • As a group go to the 5 stations listed on worksheet, each team member will; • take a clinometer reading at each station. • calculate their height at eye level. • Each group member completes their own copy of clinomter_training.xls

  4. Allometry exercise – Weeks 2 and 3 of exercise • Each group will begin collecting height, diameter and gps location data on ~30 trees on campus (See exercise - allometry.doc) • This stage of the allometry unit will probably take 2 class meetings. • Each group will produce a dataset and map to share with the other groups (excel_forgroupdataWEEK2.xls) • Individually, each person will use the full class dataset (~150 trees) to complete the rest of the assignment as described in allometry.doc

  5. Group 6

  6. Data collection 1. Clinometer readings for height calculations 2. Measuring circumference for diameter calculations s. Photos for species ID 4. UTM coordinates for mapping/location

  7. Calculate DBH by measuring circumference • distance around a circle – circumference • The distance across a circle through the center - diameter. • Pi is the ratio of the circumference of a circle to the diameter. • divide the circumference by the diameter, you get a value close to Pi.

  8. Record UTM coordinates for each tree in order to make map.

  9. Enter group date (30 trees) into dataset to be combined with all other groups

  10. Individual write up • Two pages of text – include these sections; • Introduction, Data & Methods, Results & Conclusions • Be sure to compare your analysis and results to the Peper, et al paper, are your results similar or different?). • Bottom line, can you prove a relationship between the size of tree trunks and tree height, or not? • Plus plots, map, cover page, references • References (Peper et al article plus two more of your choosing). • Be sure to include Plots A and B, use the full class dataset, include your map.

  11. Written Report – 2 pages text Introduction/Background Data & Methods Results & Conclusions

  12. Written Report • Introduction/Background.Include a thesis statement of what the experiment is about, and then should proceed to introduce it to the uninformed. • Give enough background to enable reader to place your research in a context of common knowledge.

  13. Written Report • Data & Methods.Now you can get into to the specifics of the data and the methods of analysis. • How did you collect your data? • What analysis methods did you use?, Why?

  14. Written Report • Results/Conclusions. • Describe the results of your analyses. • State what you found, refer to your plots while doing so.

  15. Full dataset n = 88 Example of a Plot A

  16. No eucalyptus n = 78 RSQ R 47% 69% Example of a Plot B

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