Appendix F. Parameter estimates for models relating fine-root surface area to non-storage root mass.
Parameter estimates (and 95% CI) for the best supported models are shown and were selected using AICc. Different letters designate significant differences among treatments within a species. ∆surface is the percent changes in fine-root surface area from high to low N within each light level and species based on the linear models.
Species |
Treatment |
N |
Model |
A (95% CI) |
B (95% CI) |
r2 |
∆surface |
AB |
HLHN |
23 |
y = Ax |
191.69 (166.66, 216.73) a |
0.74 |
58 |
|
HLLN |
24 |
y = Ax |
302.05 (270.49, 333.61) b |
0.78 |
|||
LLHN |
10 |
y = Ax |
270.81 (227.86, 313.76) b |
0.55 |
7 |
||
LLLN |
20 |
y = Ax |
289.89 (255.47, 324.31) b |
0.78 |
|||
BC |
HLHN |
19 |
y = Ax |
324.62 (303.22, 346.01) a |
0.98 |
14 |
|
HLLN |
23 |
y = Ax |
368.76 (333.22, 404.30) b |
0.86 |
|||
LLLN/HN |
12 |
No convergence |
|||||
BO |
HLHN |
10 |
y = Ax |
115.36 (79.96, 150.76) a |
0.34 |
28 |
|
HLLN |
11 |
y = Ax |
147.24 (126.55, 167.93) ab |
0.60 |
|||
LLHN |
10 |
y = Ax |
138.25 (117.12, 159.37) ab |
0.62 |
24 |
||
LLLN |
10 |
y = Ax |
171.29 (134.07, 208.51) bc |
0.52 |
|||
RM |
HLHN |
12 |
y = A*(x.B) |
228.34 (192.09, 264.58) |
0.59 (0.49, 0.69) |
0.96 |
|
y = Ax |
386.29 (329.82, 442.76) a |
0.96 |
31 |
||||
HLLN |
12 |
y = Ax |
507.70 (343.23, 672.17) a |
0.40 |
|||
RO |
HLHN |
24 |
y = Ax |
97.94 (83.00, 112.88) a |
0.78 |
54 |
|
HLLN |
22 |
y = Ax |
150.53 (130.50, 170.57) bc |
0.80 |
|||
LLHN |
23 |
y = Ax |
140.52 (125.26, 155.77) b |
0.58 |
17 |
||
|
LLLN |
24 |
y = Ax |
164.01 (145.93, 182.10) c |
0.77 |
||
SM |
HLHN |
12 |
y = A*(x.B) |
130.26 (104.80, 155.72) |
0.44 (0.29, 0.60) |
0.87 |
|
y = Ax |
205.54 (161.23, 249.84) a |
0.83 |
44 |
||||
HLLN |
9 |
y = Ax |
296.00 (212.91, 379.08) b |
0.80 |
|||
WO |
HLHN |
16 |
y = Ax |
113.17 (86.91, 139.44) a |
0.67 |
6 |
|
HLLN |
22 |
y = Ax |
120.47 (107.66, 133.28) a |
0.82 |
|||
LLHN |
23 |
y = Ax |
132.81 (111.70, 153.92) a |
0.15 |
-11 |
||
LLLN |
23 |
y = Ax |
118.5 (97.58, 139.43) a |
0.14 |