Attributes / relations provided by
♦ ¹USDA Plants Database, U. S. Department of Agriculture
♦ ²Kattge, J. et al. (2011b) TRY - a global database of plant traits Global Change Biology 17:2905-2935
♦ ³The Growth, Ecology, and Population Structure of the Giant Tortoises on Aldabra, P. Grubb, Phil. Trans. Roy. Soc. Lond. B, Vol. 260, 1971, pp. 327–372.
♦ ⁴del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
♦ ⁵Ben-Dov, Y., Miller, D.R. & Gibson, G.A.P. ScaleNet 4 November 2009
♦ ⁶Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014). Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.