Table 1 Definition of geographic and weather traits
Trait NameTrait CodeaNumber of StrainsbDescription
Latitudelatitude149Latitude coordinate where the nematode strain was collected (°)
Absolute value of latitudeabslat149Absolute value of the latitude coordinate where the nematode strain was collected (°)
Longitudelongitude149Longitude coordinate where the nematode strain was collected (degrees)
Absolute value of longitudeabslong149Absolute value of the longitude coordinate where the nematode strain was collected (°)
Elevationelevation149Calculated elevation based on latitude/longitude coordinates using “geosphere” package (m)
Temperaturetemp145Average dailyc temperature of the air (°)
Relative humidityrh129Amount of water vapor present in air expressed as a percentage of the amount needed for saturation at the same temperature (%)
Wind directionwd134Angle, measured in a clockwise direction, between true north and the direction from which the wind is blowing (°)
Wind speedws136Rate of horizontal travel of air past a fixed point (m/sec)
Cloud heightdceil_hgt122Height above the ground level of the lowest cloud or obscuring phenomena layer with 5/8 or more summation total sky cover, which may be predominantly opaque, or the vertical visibility into a surface-based obstruction (m)
Dew pointdew_point129Temperature to which a given parcel of air must be cooled at constant pressure and water vapor content in order for saturation to occur (°)
  • Definitions for traits obtained from the Federal Climate Complex Data Documentation for Integrated Surface Data http://www1.ncdc.noaa.gov/pub/data/ish/ish-format-document.pdf (August 20, 2015).

  • a Abbreviation for weather traits obtained from the raw data file format.

  • b Number of wild isolates with data for each geographic and weather trait. Number of strains for the weather traits was obtained from the 3-month mapping dataset.

  • c All weather traits were defined by averaging the average daily values (see Materials and Methods).

  • d Cloud height data were only sufficient to analyze for the three-year dataset.