Shade Tolerance data from Niinemets and Valladares 2006
Ülo Niinemets and Fernando Valladares. 2006. Tolerance to shade, drought, and waterlogging of temperate Northern Hemisphere trees and shrubs. Ecological Monographs 76:521–547.
Appendix A. Shade, drought, and waterlogging tolerance for 806 species of woody plants from the temperate Northern hemisphere.