Published online 18 November 2009 | Nature 462, 270-271 (2009) | doi:10.1038/462270a
Box: Ready to serveFrom the article:
Biodiversity: Putting a price on nature [a profile of Gretchen Daily]
A selection of nature's 'services':
Provisioning: timber, fish, wild game, fruit and fungus, even moss and foliage for floral arrangements.
Regulating: water filtration and capture, flood protection, carbon sequestration.
Cultural: recreation, education, aesthetic and spiritual contemplation.
I don't know what spiritual contemplation is. Apart from this, it seems to me that we can get all of these services by artificial means, including intensely managed ecosystems. Will these means be more expensive than "nature"?