Geoscience Reference
In-Depth Information
Table 4.4
Response function modeling statistics for seven tree species growing near Mohonk Lake
R
2
SPECIES
CUTOFF
NEIG
EIGENVECTORS
AIC
RSQ
RE
CE
TSCA
EV1
4
3
,9,
10
,
6
0.342
−
16.63
0.269
0.251
0.251
PVP
6
3
,9,
10
,
6
,15,18
0.413
−
19.37
0.248
0.111
0.110
PIRI
EV1
4
3
,11,8,
10
0.350
−
17.44
0.001
−
0.349
−
0.349
PVP
5
3
,11,19,8,
10
0.389
−
19.05
0.002
−
0,403
−
0.403
QUPR
EV1
8
6
,
3
,
10
,11,13,9,7,8
0.527
−
28.16
0.062
−
0.152
−
0.154
PVP
11
6
,
3
,
10
,11,13,9,15,7,8,20,19
0.610
−
32.22
0.159
−
0.079
−
0.081
QUVE
EV1
3
3
,
6
,
10
0.184
−
4.75
0.003
−
0.114
−
0.114
PVP
4
3
,
6
,
10
,14
0.221
−
5.51
0.008
−
0.114
−
0.114
CAGL
EV1
2
3
,
6
0.200
−
8.36
0.040
−
0.042
−
0.043
PVP
5
3
,
6
,21,14,25
0.323
−
12.35
0.020
−
0.345
−
0.356
LITU
EV1
3
3
,
6
,
10
0.250
−
10.37
0.038
−
0.073
−
0.082
PVP
5
3
,25,15,
6
,
10
0.360
−
16.06
0.064
−
0.355
−
0.367
BELE
EV1
4
3
,
6
,9,
10
0.420
−
24.93
0.005
−
0.249
−
0.262
PVP
9
3
,
6
,21,9,
10
,17,22,5,13
0.584
−
33.95
0.051
−
0.493
−
0.508
The tree species are eastern hemlock (
Tsuga canadensis
; TSCA), pitch pine (
Pinus rigida
; PIRI), chestnut oak (
Quercus prinus
; QUPR), black oak (
Quercus
velutina
; QUVE), pignut hickory (
Carya glabra
; CAGL), tulip poplar (
Liriodendron tulipifera
; LITU), and black birch (
Betula lenta
; BELE). The three most
important eigenvectors—#3, #6, and #10—are highlighted as bold numbers.
SPECIES
=
tree species abbreviations; CUTOFF
=
eigenvalue cutoff used to retain candidate eigenvectors; NEIG
=
number of eigenvectors entered into
list of entered eigenvectors in their order of entry;
R
2
each response function model. EIGENVECTORS
=
=
cumulative fractional variance of the model;
AIC
=
Akaike information criterion; RSQ
=
square Pearson correlation; RE
=
verification reduction of error; CE
=
verification coefficient of efficiency.
Higher RSQ, RE, and CE mean better verification of the fitted model.
