management techniques, and inherent soil properties. New monitoring and measurement methods, as well as dynamic simulation models that reflect real field conditions, are needed to better place a value on soil functions as they relate to ecosystem services.

Perhaps the broader soil science research community can learn from the New Zealand experience. We need to find ways to work with the funding community to raise awareness of the value of the ecosystem services that soils in both managed and natural settings provide, as did the scientific community in New Zealand.

REFERENCES

Boumans, R. M. J., R. Costanza, J. Farley, M. A. Wilson, R. Portela, J. Rotmans, F. Villa, and M. Grasso. 2002. Modeling the dynamics of the integrated earth system and the value of global ecosystem services using the GUMBO model. Ecological Economics 41:529-560.

Millennium Ecosystem Assessment. 2005. Ecosystems and Human Well-being: Biodiversity Synthesis. Washington, DC: World Resources Institute.

National Research Council. 2004. Valuing Ecosystem Services: Toward Better Environmental Decision-Making. Washington, DC: The National Academies Press.

Tilman, D., J. Knops, D. Wedin, and P. Reich. 2002. Experimental and observational studies of diversity, productivity, and stability. Pp. 42-70 in Functional Consequences of Biodiversity: Empirical Progress and Theoretical Extensions, A. Kinzig, S. Pacala, and D. Tilman, eds. Princeton, NJ: Princeton University Press.



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