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Mycorrhizae are essential symbioses regulating the trajectory of succession following severe perturbation of a site (E.B. Allen and M.F. Allen 1990). As Pickett and McDonnell (1989) noted, succession is probably the single law of ecology. However, the course of succession is not a predetermined one; rather, it depends on the composition of residuals surviving a disturbance (a function of the degree and type of perturbation), the activity of vectors, and the changing chemical/physical environment (E.B. Allen 1988). Because a mycorrhiza is a symbiosis of fungus and plant, conceptual models that describe mycorrhizal development and the effects of mycorrhizae on ecosystems require an understanding of the ecology of both organisms independently, together with information on their interactions. |
