Ecosystem pathology: A new perspective for phytopathology |
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| Authors: | William H Smith |
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| Institution: | School of Forestry and Environmental Studies, Yale University, New Haven, CT 06511 U.S.A. |
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| Abstract: | Evaluations of ecosystem health are substantially different from evaluations of individual plant health. The significance of regional air pollutants, e.g. ozone, acid deposition and trace metals, must be evaluated in terms of ecosystem health. All ecosystems have common components organized in structural patterns and united by functional processes. The most important ecosystem components impacted by regional air pollutants include the producers and decomposes. These influences can alter the processes of energy flow (production) and biogeochemical cycling. This alteration, in turn, can change the production of biomass and/or the pattern of succession of the ecosystem. Forest ecosystem interaction with three air pollutants is reviewed to illustrate ecosystem pathology. |
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