Abstract

Many natural ecosystems are self-sustaining, maintaining a characteristic mosaic of vegetation types for hundreds to thousands of years. In this article we present a new framework for defining the conditions that sustain natural ecosystems and apply these principles to sustainability of managed ecosystems. A sustainable ecosystem is one that, over the normal cycle of disturbance events, maintains its characteristic diversity of major functional groups, productivity, and rates of biogeochemical cycling. These traits are determined by a set of four "interactive controls" (climate, soil resource supply, major functional groups of organisms, and disturbance regime) that both govern and respond to ecosystem processes. Ecosystems cannot be sustained unless the interactive controls oscillate within stable bounds. This occurs when negative feedbacks constrain changes in these controls. For example, negative feedbacks associated with food availability and predation often constrain changes in the population size of a species. Linkages among ecosystems in a landscape can contribute to sustainability by creating or extending the feedback network beyond a single patch. The sustainability of managed systems can be increased by maintaining interactive controls so that they form negative feedbacks within ecosystems and by using laws and regulations to create negative feedbacks between ecosystems and human activities, such as between ocean ecosystems and marine fisheries. Degraded ecosystems can be restored through practices that enhance positive feedbacks to bring the ecosystem to a state where the interactive controls are commensurate with desired ecosystem characteristics. The possible combinations of interactive controls that govern ecosystem traits are limited by the environment, constraining the extent to which ecosystems can be managed sustainably for human purposes.

Keywords

EcosystemSustainabilityDisturbance (geology)EcologyEcosystem ecologyMarine ecosystemEnvironmental resource managementProductivityNatural resourceTerrestrial ecosystemBiogeochemical cyclePopulationAlternative stable stateNatural (archaeology)Environmental scienceEcosystem engineerBiologyEconomics

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Publication Info

Year
1996
Type
article
Volume
148
Issue
6
Pages
1016-1037
Citations
247
Access
Closed

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Cite This

F. Stuart Chapin, Margaret Torn, Masaki Tateno (1996). Principles of Ecosystem Sustainability. The American Naturalist , 148 (6) , 1016-1037. https://doi.org/10.1086/285969

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DOI
10.1086/285969