Percentage life forms and total percent species per impact category. Columns show the percent of life forms per each impact category, with the total number of species per impact category above each column. For example 37% of the species in the competition category are trees and 39% of the species that can impact through changes to physical structure are trees. The black dots show the percent of species in each impact category of the total species list. For example, 96% of the species could impact through direct competition, while 73% could impact through changing the physical structure.