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Table 2 Pearson’s Product Moment correlation coefficients for density (birds/ha) of different functional groups and biophysical variable

From: Waterbird use of farm dams in south-eastern Australia: abundance and influence of biophysical and landscape characteristics

  Shorebirds (Charadriiformes) Long-legged wading birds Swamphens and coot (Rallidae) Pursuit predators Diving Dabbling Filtering Herbivorous Total abundance Species richness
Area (ha) 0.499 −0.115 0.787 −0.105 0.269 0.330 0.275 −0.085 0.157 −0.389
Perimeter (m) 0.434 −0.102 0.635 −0.121 0.188 0.248 0.173 −0.094 0.092 −0.446
Shoreline irregularity 0.161 −0.018 0.189 −0.106 0.007 −0.046 −0.072 0.027 0.046 −0.341
Maximum depth (m) 0.373 0.030 0.273 0.095 0.158 0.221 0.222 −0.150 −0.012 −0.208
Distance shallow slope (m) 0.380 −0.120 0.4923 −0.183 0.116 0.155 0.109 0.008 0.128 −0.395
% Shallow slope 0.155 0.005 0.092 −0.243 −0.162 −0.006 −0.119 0.270 0.237 −0.273
Bare earth 0.058 0.068 0.132 −0.256 −0.289 0.090 0.003 0.358 0.335 −0.009
Distance to nearest pond (m) −0.280 0.158 −0.266 0.022 −0.115 −0.139 0.055 −0.113 −0.182 0.075
Emergent vegetation 0.151 −0.124 0.617 −0.101 0.208 0.235 0.188 −0.201 −0.016 −0.136
Non-tree perches 0.193 0.039 0.471 0.212 0.026 0.317 0.163 −0.159 0.021 −0.024
Tree cover −0.019 0.059 0.016 0.127 0.117 −0.106 −0.046 −0.221 −0.197 0.013
Trees in pond −0.028 0.212 0.033 0.293 −0.069 0.020 −0.012 −0.072 −0.028 0.029
Chlorophyll a (mg/L) −0.124 0.116 −0.147 0.180 −0.081 −0.088 0.181 0.0173 −0.018 0.153
Conductivity (µS/cm) 0.323 0.148 0.314 −0.200 0.030 0.273 0.296 0.059 0.185 −0.044
Dissolved O2 (mg/L) 0.159 0.198 −0.001 0.050 0.081 −0.007 0.003 −0.007 0.032 0.114
Turbidity (NTU) 0.026 0.051 −0.123 0.006 −0.159 −0.124 −0.092 0.100 0.030 −0.029
pH 0.208 0.144 0.0849 −0.064 0.281 0.130 0.223 0.039 0.137 0.191
Total invertebrates −0.026 0.002 0.065 0.066 0.0738 0.097 −0.048 0.056 0.097 −0.010
  1. *Denotes p < 0.05 for the null hypothesis that r = 0, and # denotes that p was significant after the Dunn-Šidák correction was applied (p < 0.0003)
  2. Strong correlations (>0.6) are presented in italics. Factors without units reported were measured on the 1‒5 Likert scale described above