Data4Dryad

CSV file with 1 header line, 26 columns, and 9830 rows of data. Data collated from literature reviews (sources cited in the main text or in column 23). Version 2 of this data set corrects a scaling issue in the original column 18 (that is, ca. 2% of the originally reported values for BREEDING.RANGE.AREA were reported in m2 rather than km2). V2 also provides recomputed values for the composite variables derived from principal components analysis (cols. 19-22). PLEASE NOTE THAT: (i) All original values can still be accessed through v1; and (ii) this minor correction does not affect qualitatively the findings reported in our MEC paper. ABBREVIATIONS and UNITS: DISSECTED.BY.MOUNTAINS = True if breeding range is divided into two or more isolated regions by a mountain chain; LAT.RANGE = Latitudinal range; ENV.SHIELDING = Environmental shielding (1 = migratory bird or hibernating mammal); GLACIATION: 1= 20% or more of current breeding range overlap with areas glaciated in the last 21,000 years; ISLAND.DWELLING: 1 = 20% or more of the breeding range occurs on islands; HABITAT.HETEROGENEITY: number of biomes covering at least 5% of the breeding range; BODY.SIZE: Adult body size in grams; PRECIP = Precipitation (in mm); TEMP = Temperature (in degrees Celcius)NPP = Net Primary Productivity (in log10[ g carbon per yr ] ); BREEDING.RANGE.AREA = Area of the breeding distribution (in km2); ENV.HARSHNESS = Environmental harshness (Raw values for PC1); GEOGRAPHIC.COVERAGE = Raw values for PC2; RAINFALL.UNPREDICTABILITY = Raw values for PC3; RESIDUAL.BODY.SIZE = Raw Values for PC4; N.MOST.LAT = Northernmost latitude in the breeding range; S.MOST.LAT = Southernmost latitude in the breeding range; CENTROID = centroid latitude for the breeding range.