Ecological Archives H001-004-A1
Jennifer M. Duggan, Bradley A. Eichelberger, Shan Ma, Joshua J. Lawler, and Guy Ziv. 2015. Informing management of rare species with an approach combining scenario modeling and spatially explicit risk assessment. Ecosystem Health and Sustainability 1:22. http://dx.doi.org/10.1890/ehs14-0009.1
Appendix A. Information supplementing main text includes a table displaying classification of temporal overlap between training-activity stressors and prairie habitat, figures illustrating current risk and changes in risk to potential habitat for Mazama pocket gopher (Thomomys mazama) under alternative management scenarios including either 100% Scotch broom removal or additional year-round restrictions, and figures depicting risk to potential habitat for all study species [streaked horned lark (Eremophila alpestris strigata), Taylor’s checkerspot butterfly (Euphydryas editha taylori), Mazama pocket gopher (Thomomys mazama)] under alternative management scenarios including either additional seasonal restrictions alone or combined with 100% Scotch broom removal.
All depictions of risk are applied to habitat at Joint Base Lewis-McChord, Washington State, USA.
Table A1. We calculated temporal overlap between training-activity stressors and prairie, categorized as “high”, “medium” (med) or “low”, for each 30 × 30-m cell in the study area by multiplying unrestricted use (% of year) by frequency of training use (% of year). We determined unrestricted use and frequency of training using information from maps of training areas and training restrictions, training manuals, and interviews with base personnel.
Fig. A1. Risk to Mazama pocket gopher (Thomomys mazama) under current conditions, with change in risk from current conditions to a scenario with 100% Scotch broom (SB) removal, and with change in risk from current conditions to a scenario with additional year-round training restrictions in all potential habitat at Joint Base Lewis-McChord, Washington State, USA (non-grassland = gray). Green coloring indicates areas of grassland/savanna habitat and areas outlined in black are designated as potential habitat for Mazama pocket gopher.
Fig. A2. Potential habitat at predicted risk (ha) for Mazama pocket gopher (Thomomys mazama) within areas verified as occupied, areas accessible outside the Artillery Impact Area, and areas inaccessible outside the Artillery Impact Area under three alternative management scenarios at Joint Base Lewis-McChord, Washington State, USA: (1) Current conditions, (2) 100% Scotch broom (SB) removal and (3) Additional year-round restrictions.
Fig. A3. Potential habitat at predicted risk (ha) for streaked horned lark (Eremophila alpestris strigata), Taylor’s checkerspot butterfly (Euphydryas editha taylori), and Mazama pocket gopher (Thomomys mazama) within areas verified as occupied, areas accessible outside the Artillery Impact Area, and areas inaccessible outside the Artillery Impact Area under two alternative management scenarios at Joint Base Lewis-McChord, Washington State, USA: (1) Additional seasonal restrictions, (2) 100% Scotch broom (SB) removal and additional seasonal restrictions.
