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Appendix D: Integrated Assessments

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Appendix D: Integrated Assessments Appendix D: Integrated Assessment Table of Contents D-1 Model Approach ........................................................................................................................... 3 D-1.1 Conceptual Models .................................................................................................................. 3 D-1.2 Spatial Models ......................................................................................................................... 3 D-1.2.1 Basic Assessment Model ................................................................................................ 4 D-1.2.2 Other Assessment Models ............................................................................................. 4 D-2 Findings in terms of Management Questions ............................................................................... 7 D-2.1 Current Distribution and Footprint Analysis ............................................................................ 7 D-2.1.1 Terrestrial CE distributions, overlain with current CAs .................................................. 7 D-2.1.2 High Biodiversity Sites, Sensitive Soils, HMAs and GAs overlap with CAs ................... 11 D-2.1.3 Uncertainty, Limitations and Data Gaps ...................................................................... 11 D-2.1.4 High Biodiversity Sites, overlain with current and 2025 scenario CAs ........................ 11 D-2.1.5 Sensitive Soils, overlain with current and 2025 scenario CAs ..................................... 12 D-2.1.6 Herd Management Areas, overlain with current and 2025 scenario CAs ................... 13 D-2.1.7 Grazing allotments, overlain with current and 2025 scenario CAs.............................. 15 D-2.1.8 Aquatic Distributions, overlain with current CAs ......................................................... 31 D-2.1.9 Groundwater consumption.......................................................................................... 32 D-2.1.10 Places I w/Aquatic Distributions with current Development CAs ............................... 33 D-2.2 Specialized analyses: Restoration Potential .......................................................................... 35 D-2.3 2025 Distribution: CEs and CAs.............................................................................................. 36 D-2.3.1 Potential Renewable overlap with CEs ........................................................................ 41 D-2.3.2 Energy impact mitigation sites ..................................................................................... 44 D-2.4 2060 Distribution ................................................................................................................... 45 D-2.4.1 Climate change and Places........................................................................................... 45 D-2.4.2 Climate Change and Aquatic CEs ................................................................................. 48 D-2.4.3 Fire - Forecasted Departure ......................................................................................... 49 D-2.4.4 Climate Change Vulnerability Index Assessment for Species ...................................... 50 D-2.5 Uncertainty, Limitations and Data Gaps ................................................................................ 68 D-3 References Cited in Appendix D .................................................................................................. 69 Mojave Basin & Range Ecoregion – Final REA Report II-3-c: Appendix D (Integrated Assessments) Page 1 Tables Table D - 1. Percent of CEs overlapped by development CAs in the current scenario; CEs are sorted by the % of distribution overlapped by current development. .......................................... 8 Table D - 2. Acres and proportion of high biodiversity sites overlain by current and 2025 development CAs. ........................................................................................................................ 12 Table D - 3. Acres and percent of development change agents by Sensitive Soil, 2010-2025 ........... 12 Table D - 4. Acres and percent of development change agents by HMA, 2010-2025. ....................... 14 Table D - 5. Acres and percent of development change agents by Grazing Allotment, 2010-2025. .. 16 Table D - 6. Percent of CEs overlapped by development CAs in the 2025 scenario; CEs are sorted by the % of distribution overlapped by future development. ..................................................... 38 Table D - 7. Climate change vulnerability index assessment results for Nevada species. .................. 54 Figures Figure D - 1. Spatial model graphic convention .................................................................................... 3 Figure D - 2. Basic Assessment Model ................................................................................................... 4 Figure D - 3. Spatial Model for Potential Renewable Energy Area intersecting with CEs. This corresponds to MQ 90 ................................................................................................................... 5 Figure D - 4. Conceptual model for the MQ89, “Where are the areas of low renewable and non- renewable energy development that could potentially mitigate impacts to CEs from potential energy development?” ................................................................................................... 6 Figure D - 5. Current landscape condition within herd management areas. ...................................... 13 Figure D - 6. Current landscape condition within grazing allotments ................................................. 15 Figure D - 7. Location of likely groundwater recharge zones (top) and their condition (bottom); .... 31 Figure D - 8. Groundwater use scored by watershed. ........................................................................ 33 Figure D - 9. High Biodiversity Sites, most of which support occurrences of aquatic coarse filter CEs. ............................................................................................................................................... 34 Figure D - 10. The Key Ecological Attribute of Hydrologic Condition for two CEs .............................. 34 Figure D - 11. Conceptual model for identification or restoration/enhancement areas. ................... 35 Figure D - 12. Potential habitat connectivity restoration/enhancement sites for Mojave desert tortoise. ........................................................................................................................................ 36 Figure D - 13. Solar Energy Suitability with Landscape Species and Landscape Condition. ................ 42 Figure D - 14. Geothermal Energy Suitability with Landscape Species and Landscape Condition. .... 43 Figure D - 15. Wind Energy Suitability with Landscape Species and Landscape Condition. ............... 44 Figure D - 16. Potential mitigation areas for renewable energy development. ................................. 45 Figure D - 17. Areas with projected significant climate change in the MBR ....................................... 46 Figure D - 18. Herd management areas likely to experience significant climate change by 2060. .... 47 Figure D - 19. Grazing allotments likely to experience significant climate change by 2060. .............. 47 Figure D - 20. High biodiversity sites, many of which support aquatic coarse-filter CEs, which are projected to experience significant climate change by 2060. ..................................................... 48 Figure D - 21. Area weighted fire regime departure for 2060; included all terrestrial coarse-filter CEs for which fire regime departure was calculated.................................................................... 50 Mojave Basin & Range Ecoregion – Final REA Report II-3-c: Appendix D (Integrated Assessments) Page 2 INTEGRATED ASSESSMENT D-1 Model Approach D-1.1 Conceptual Models The conceptual model for integrated assessment with development CAs draws from the ecosystem conceptual model in terms of CA influence on CEs. These influences were listed in Appendix A Conceptual Models and describe known or expected effects of development CAs on the extent and condition of CEs generally. This rapid ecoregional assessment did not attempt to derive specific cause and effect models on individual CEs. D-1.2 Spatial Models Spatial models follow the graphic conventions per [Figure]. Existing Energy Production “Raw” data input- occurrences, locations, etc Facilities Identify impact area Process step 2010 Interim or final product Energy Scenario Identify Key decision highest potential Previous model Preparation step components Figure D - 1. Spatial model graphic convention Mojave Basin & Range Ecoregion – Final REA Report II-3-c: Appendix D (Integrated Assessments) Page 3 D-1.2.1 Basic Assessment Model Many MQs can be summarized as “Where will X coincide with Y?” seeking to identify areas where, for example, CEs will be coincident with CAs that may cause impacts (but do not attempt to model the impact). These types of MQs can be answered by a basic assessment model (Figure D - 2) that will intersect the distribution map of a CE with a mapped or modeled distribution of a CA. Areas or portions of overlap between the CE and CA can be displayed as a map and accompanied by summary statistics. This same model was used to intersect the CAs with other units such as the sensitive soils, high biodiversity sites, herd management
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