Fig 1.
Standardized Beta-coefficients and associated standard errors for all variables included in the global Resource Selection Function models for greater sage-grouse nesting habitat models in the Powder River Basin, Wyoming, U.S.A. The gray lines represent estimates from the pre-mitigation model developed using nesting data from 2004–2007. The black lines represent coefficient estimates from the post-mitigation model developed using nesting data from 2008–2011. TWI: Mean Topographic Wetness Index. VRM: Mean Vector Roughness Measure.
Table 1.
Spatial variables.
Table 2.
Coefficient estimates.
Fig 2.
Margins plot depicting the functional form of greater sage-grouse response to the three variables with different coefficient estimates between the pre- and post-mitigation time periods. Model predictions are based on the global Resource Selection Function models for nesting habitat in the Powder River Basin, Wyoming, U.S.A. Model predictions for the pre-mitigation model (2004–2007) are represented by the dashed lines with darker gray 95% confidence intervals. Model predictions for the post-mitigation model (2008–2011) are represented by the solid lines and lighter gray 95% confidence intervals. VRM: Mean Vector Roughness Measure.
Fig 3.
Pre-Mitigation Nesting Habitat.
Relative predicted probability surface for the pre-mitigation nesting habitat model divided into 5 equal-area bins for greater sage-grouse in the Powder River Basin, Wyoming, U.S.A. Nest locations used in model development were collected from 2004–2007 and are indicated by the blue circles. The colors range from dark green to yellow to represent the range of relative nesting probability from low to high. Well locations are indicated by black circles.
Fig 4.
Post-Mitigation Nesting Habitat.
Relative predicted probability surface for the post-mitigation nesting habitat model divided into 5 equal-area bins for greater sage-grouse in the Powder River Basin, Wyoming, U.S.A. Nest locations used in model development were collected from 2008–2011 and are indicated by the yellow circles. Nest locations from the pre-mitigation data set (2004–2007) are indicated by the blue circles. The colors range from dark green to yellow to represent the range of relative nesting probability from low to high. Unmitigated well locations are indicated by black circles. Mitigated wells are indicated by purple circles.
Fig 5.
Change in relative predicted probability surface between the pre- and post-mitigation nesting habitat models for greater sage-grouse in the Powder River Basin, Wyoming, U.S.A. Values range from -3 (black) to +3 (dark green) and represent the change in bin classification between the two models from pre-mitigation nesting habitat to post-mitigation nesting habitat. Nest locations used in the pre-mitigation model development (2004–2007) are indicated by the blue circles and the nest locations used in the post-mitigation model development (2008–2011) are indicated by the yellow circles. Unmitigated well locations are indicated by black circles. Mitigated wells are indicated by purple circles.