Analysis of information sources in references of the Wikipedia article "Frederic Clements" in English language version.
Clements was important also for publishing the first American textbook in ecology, Research Methods in Ecology (1905), which discussed the statistical and graphical analytical methods he and other Nebraskan ecologists developed from 1897 to 1905. His ecological theory rested on two ideas, the concept of ecological succession of plant formations, and the treatment of the plant community as a "complex organism" undergoing a life cycle and evolutionary history analogous to the individual organism. The formal presentation of his theory appeared in 1916 in his monumental study Plant Succession.