THE ECOSYSTEM HEALTH METAPHOR IN SCIENCE AND POLICY

Ecosystem health' is an increasingly common metaphor in the langauge of science and policy. Given the prominence of both the ecosystem and health concepts within geography, this paper examines the meanings generated by the adoption of the metaphor for scientific research and for environmental policy on the North American Great Lakes. 'Ecosystem' can be characterized as an entity, an abstract concept, or a perspective. As perspective, ecosystem shares many features of postmodern science, emphasizing complexity and holism and calling for the inclusion of human beings in our considerations of nature. The ecosystem health metaphor is politically powerful in its ability to evoke action and concern for the environment with an appeal to the universal experiences of human ill-health. The organismic ecosystem health metaphor provides a new, relevant way of thinking about the natural world. In policy discourse, however, metaphor can be problematic in that there is potential for the author or speaker to hide behind the nonliteral language. Moreover, the acceptance of the ecosystem health metaphor which can draw upon widely held beliefs and norms implies that other ways of knowing the world are necessarily omitted. We highlight some of these issues in a case study of a policy document prepared by the Ecological Committee of the Great Lakes International Joint Commission. To continue to know how to study nature in new ways, metaphors must be encouraged, but their meanings must also be widely explored