The environmental changes that could result from human actIvitIes are sufficiently large to be characterized as an "uncontrolled global experiment" (7). The obvious lack of experimental control when complex changes are global in scale, along with a myriad of other logistic difficulties, confound the evaluation of global consequences. This has created a need for reasoned extrapolations from experimental and observational data and the application of computer models to predict the ecological response of the terrestrial surface to changes in the environment. The first model-based evaluations of global changes for terrestrial vegetation focused on identifying which phenomena need to be considered and at what (88, 33). Then the emphasis on plant physiology (22, 27, 4 1 , 7 1, 72, 1 18) versus the emphasis on individualÂ plant natural history and demography (34, 43, 44, 55, 56, 76, 121) formed temporal and spatial scales and biophysics *The US government has the right to retain a nonexclusive. roya l ty free license in and to any - copyright covering this paper. SHUGART, SMITH & POST an important dichotomy for the models simulating the vegetation dynamics in response to environmental change. This dichotomy has blurred as a new generation of models
Annual Review of Ecology, Evolution, and Systematics – Annual Reviews
Published: Nov 1, 1992
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