We had an interesting discussion about ecosystem services and human wellbeing in our 6pm session, and also some discussion about associating economic value with ecosystems services. The Millennium Ecosystem Assessment has a chapter on Ecosystems and Human Well-being (Ch3, p71) which might be of interest to those wanting to read further on this.
The MEA above should not be confused with TEEB (The Economics of Ecosystems and Biodiversity), which was a different initiative, and no doubt well-meaning, but it was met with fierce criticism by some leading environmentalists.
Hope that is of interest to anyone wanting to dig a bit deeper. But maybe others have a different take on this?
Kind regards, Martin