Scaling from Species to Vegetation: The Usefulness of Functional Groups

The major constraints in predicting vegetation responses to atmospheric changes are the complexity of interactions between plants and their biotic and abiotic environment. Unless we decide to wait and see what the truth will be, we are left with the need to simulate future vegetation responses. This can be done both experimentally and by computer models. Experimental simulations are limited in space and time and can, at best, reveal transitional response characteristics and trends. Models, on the other hand, are not space and time limited but depend totally on accurate parameterization. This causes them to be dependent on experimentation which provides real data.

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