Ecological Archives E090-043-A1

Jake M. Alexander, Peter J. Edwards, Myriam Poll, Catherine G. Parks, and Hansjörg Dietz. 2009. Establishment of parallel altitudinal clines in traits of native and introduced forbs. Ecology 90:612–622.

Appendix A. A graph showing the relationship between heat sum and number of frost days along altitudinal gradients in the study regions.

FigA1
 
   FIG. A1. Relationship between altitude and (a) heat sum (degree days > 5°C) and (b) number of frost days (minimum temperature < 0°C) in the Valais (VS; filled circles) and the Wallowa Mountains (WM; open circles) from April to September 2005. The data were collected along four altitudinal transects (roads): Visp to Furka pass (VS; solid line), Martigny to Grand St. Bernard pass (VS; dot-dashed line), Mount Harris Loop (WM; dotted line), Moss Springs Rd (WM; dashed line).

[Back to E090-043]