Geoscience Reference
In-Depth Information
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A
B
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20 40 60 80100120 140
Canopy Height (cm)
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20 40 60 80100120 140
Canopy Height (cm)
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C
D
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Canopy Height (cm)
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Canopy Height (cm)
Figure 5.5
Light attenuation profiles ([
] 16 October, [
] 7 February, 9 [
●
] September, and [
] 11 December)
associated with a
marsh representing the aggregate of (A) all profiles, (B)
only undisturbed canopy locations, (C) partial canopy gaps, and (D) only severely lodged canopy
locations.
Panicum hemitomon
changes. Similar to the second example, curves are shown depicting site occupations in a lightly
affected Juncus R. marsh chronologically in April, September, November, and March (Figures
5.6A, B, and C). Although little canopy structural change is expected in these marshes, curves
including only undisturbed profiles (Figure 5.6B) indicate a slight tendency for increased canopy
light attenuation in the spring vs. late summer and winter seasons. A final example shows the effect
1.00
1.00
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A
B
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0
20
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80 100 120
0
20 40
60
80 100 120
Canopy Height (cm)
Canopy Height (cm)
1.00
0.90
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0.60
0.50
0.40
0.30
0.20
C
0.10
0.00
0
20
40 60
80 100 120
Canopy Height (cm)
Figure 5.6
Light attenuation profiles ([
] 26 April, [
] 4 September, [
●
] 3 November, and [
] 9 March)
marsh representing the aggregate of (A) all profiles, (B) only
undisturbed canopy locations, and (C) partial canopy gaps.
associated with a
Spartina alterniflora
