so, what’s the deal with pine needles?
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So, what’s the deal with pine needles?. Genevieve Chung Ethel Stanley Susan Finazzo. Why use plants as models for data collection?. Plants are everywhere familiar Students ‘see’ them without seeing them. Plants respond to the environment, both macroscopically and microscopically. - PowerPoint PPT PresentationTRANSCRIPT
So, what’s the deal with pine needles?
Genevieve Chung
Ethel Stanley
Susan Finazzo
Why use plants as models for data collection?
• Plants are everywhere familiar
• Students ‘see’ them without seeing them.
• Plants respond to the environment, both macroscopically and microscopically.
• You probably won’t have PETA knocking your door down.
Why do pines?
• Common plants
• Background info available
• Perennial evergreens have ‘history’.
• Tree leaves exist in microenvironments.
Student Generated Data
• Student develop hypotheses (re:leaves).– Directional differences (east facing vs. west
facing)– Age factors– Canopy location– Different tree data, irrigated vs. non-irrigated– So many questions, so little time…..
Our Data
• East and West Branches• This year’s and last year’s
growth• Number of fasicles• Length of fasicles• Wet weight• Dry weight
Data Presentation with Merlin
Sample Number
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Sample1(mm)
Sample2(mm)
Sample 3(mm)
Sample 4(mm)
Sample 5(mm)
Sample 6(mm)
Sample Number
Le
af
Le
ng
th
• Sample 1
– East side
– 15 fasicles, 2009
• Sample 2
– West side
– 48 fasicles, 2009
• Sample 3
– East side
– 30 fasicles, 2010
• Sample 4
– West side
– 32 fasicles, 2010
• Sample 5
– East side, main branch
– 66 fasicles, 2009
• Sample 6
– West side, main branch
– 84 fasicles, 2009
Data Presentation with Merlin
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Fresh Weight (mg)
Su
m N
ee
dle
Le
ng
th (
mm
)Sample Net fresh weight (mg) Sum Needle length
1 3,086 139.70
2 6,785 366.15
3 3,964 189.95
4 4,468 225.05
5 13,716 568.70
6 15,841 765.60
More Merlin
Sample Dry weight mg Sum Needle length
1 1568 139.70
2 3507 366.15
3 1510 189.95
4 1729 225.05
5 7255 568.70
6 8090 765.60
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Dry Weight (mg)
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th
