Table 2 Results of the multiple regressions of the relationship between the behavioral diversity metrics (divergence, evenness, and richness) of the Zygoptera and selected environmental variables in two regions of the eastern Amazon, Brazil.
From: Impact of environmental changes on the behavioral diversity of the Odonata (Insecta) in the Amazon
Environmental variable | Beta | Standard error of the beta value | t | p |
|---|---|---|---|---|
Divergence (R2 = 0.37) | ||||
Intercept | 0.804 | 0.010 | 77.173 | < 0.001* |
Litter (V6) | − 0.022 | 0.014 | − 1.533 | 0.130 |
Mean small tree canopy cover (V9) | 0.038 | 0.015 | 2.531 | 0.014* |
Mean slope (%) (V11) | 0.013 | 0.012 | 1.116 | 0.268 |
Substrate D50 (V12) | − 0.028 | 0.012 | − 2.456 | 0.027* |
Non-agricultural land use (V14) | 0.027 | 0.012 | 2.243 | 0.029* |
Volume of wood (V19) | 0.019 | 0.014 | 1.347 | 0.183 |
Substrate of fine sediment (V21) | − 0.014 | 0.015 | − 0.884 | 0.380 |
Mean catchment slope (V26) | − 0.021 | 0.012 | − 1.760 | 0.083 |
Evenness (R2 = 0.19) | ||||
Intercept | 0.584 | 0.021 | 27.920 | < 0.001* |
Habitat Integrity Index (V1) | 0.050 | 0.023 | 2.163 | 0.0340* |
Litter (V6) | − 0.041 | 0.026 | − 1.586 | 0.117 |
Mid-stream canopy density (V7) | 0.041 | 0.025 | 1.662 | 0.101 |
Large woody debris in channel (V15) | 0.059 | 0.024 | 2.459 | 0.016* |
Volume of wood (V19) | 0.032 | 0.024 | 1.336 | 0.186 |
Richness (R2 = 0.33) | ||||
Intercept | 0.112 | 0.007 | 16.353 | < 0.001* |
Habitat Integrity Index (V1) | 0.017 | 0.010 | 1.806 | 0.075 |
Electrical conductivity (V2) | 0.032 | 0.009 | 3.611 | < 0.001* |
Litter (V6) | − 0.011 | 0.009 | − 1.221 | 0.226 |
Mid-stream canopy density (V7) | 0.013 | 0.008 | 1.561 | 0.123 |
Volume of wood (V19) | 0.018 | 0.009 | 1.990 | 0.049* |
Intensity of non-forest land use (V29) | − 0.016 | 0.010 | − 1.633 | 0.107 |
