Identification of Fine-Scale Marine Benthic Ecoclines by Multiple Parallel Ordination
Table 5
Kendall's correlations between environmental variables and DCA axes 1 and 2 with no (), intermediate (), and strong () weight given to abundance.
Variable/range
DCA1
DCA2
(qual)
(raw)
(qual)
(raw)
DEM derived
Aspect_E
0.011
−0.026
−0.090
0.148
0.021
0.196
Aspect_N
0.101
0.032
−0.074
−0.069
−0.143
−0.085
BPI
0.228
0.169
0.148
−0.016
−0.164
−0.201
Depth
−0.656
−0.820
−0.757
−0.053
−0.063
0.079
Seabed_curv
0.169
0.132
0.079
−0.127
−0.169
−0.312
Slope
0.127
−0.005
−0.153
−0.148
−0.021
−0.132
Current model
Current_bottom
−0.026
−0.095
−0.085
−0.037
−0.143
0.085
Current_surface
−0.307
−0.407
−0.471
−0.212
−0.106
−0.090
Change_curr_bottom
0.074
0.101
0.132
−0.032
−0.053
−0.005
Change_curr_surface
−0.058
−0.138
−0.116
0.090
0.143
0.254
Direction_curr_E
0.024
−0.024
−0.083
−0.008
−0.110
−0.143
Direction_curr_N
0.179
0.094
0.083
−0.035
−0.265
−0.099
Sediment features
Mud content
0.053
0.122
0.069
−0.116
0.095
0.164
Sed_kurt
0.240
0.272
0.245
−0.191
−0.046
−0.073
Sed_med
−0.027
−0.074
−0.095
0.090
0.000
−0.032
Sed_skew
0.099
0.184
0.152
−0.056
0.088
0.318
Sed_sort
0.130
0.135
0.114
0.227
0.146
0.205
Other variables
BMD
−0.412
−0.434
−0.445
0.233
0.228
0.385
Penetration_depth
−0.174
−0.227
−0.286
0.184
0.067
0.206
CN
0.265
0.286
0.318
−0.170
−0.202
−0.260
TOC
−0.202
−0.303
−0.330
−0.245
−0.250
−0.106
TN
−0.257
−0.349
−0.393
−0.149
−0.149
0.008
VEAS_dist
0.349
0.407
0.407
0.138
−0.021
−0.122
Bold values represent ≥ 0.225, which corresponds to a P value of approximately 0.10 in test of the hypothesis that when . The unconfirmed second axis (DCA2.) according to criteria given in Section 2.6 is shown in italic.