Mean Annual Temperature (☌) average annual temperature for the counties occupied by the species. The legend contains the temperature in degrees Celsius the scale for the current climate differs slightly from the other scenarios which all have the same temperature scale. The climate will be affected by the emission levels of each scenario, and the results of nine models have been included for each variable. The scale is 1:33,000,000 and is projected in Clarke 1866 Albers. Maps are based on a 20 x 20km grid of cells that make up the extent of the United States east of the 100th Meridian. Within the Climate tab, two maps have been provided so that a comparison can be made by selecting two models. Due to the nature of the non-climatic variables, the seven climate variables were only mapped for each scenario to compare the differences in the models. The 38 variable are divided into five categories including Climate (7), Soil Properties (12), Soil Types (9), Elevation (5), and Landscape (5). These maps are tied to the tree diagram for the 38 model variables, which drive the distribution of a species. Future/Current IV The ratio of change between the modeled current Sum IV and any of the GCM scenarios Sum IV. Thus it is a metric that considers both the abundance and the range of the species, perhaps the best metric of overall species importance. Sum IV The sum of importance values (IV) across all cells. IV The average importance value (IV) across all 20x20 km cells that have been modeled to be suitable for the species. There are a total of 9767 cells used in the model. Potential Changes in Abundance and Range (Future) Percent Area Occupied The percent of 20x20 km cells within the total area of the eastern United States that have been modeled to be suitable for the species. The value is the bases for modeling and projecting bird incidence across the eastern US. The BBS Incidence (on a scale of 0 – 1) represents the proportion of times a species was observed on a route over a decade. The legend shows the incidence values (IV) of the species as calculated from the North America Breeding Bird Survey data (BBS). The pull-down menus allow any combination, and the animation button allows a flashing (on/off) view between selected scenarios. future (2071-2100) General Circulation Models (three different models and their "average") and two emission scenarios (B1, a 'Lo'- relatively high conservation emission scenario and A1fi, a 'Hi' - keep increase fossil fuel emissions). The abundance change maps provide a pairwise view of a suite of combinations of current (1961-1990 baseline) conditions vs.
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