Ecosystem services and water purification.

Ecosystem services and water purification.
http://5bio5.blogspot.com/2013/07/ecosystem-services-and-water.html
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http://www.werh.org/PlasTan%20Y%20Bwlch/documents/Plas2012ConorKretsch-ReducingRisks-MakingValueJudgements.pdf
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Ecosystem services -  Regulating services:
Air quality regulation;
Climate regulation
Water regulation
Erosion regulation
Pollination
Natural hazard regulation
Water purification and treatment
Disease regulation
Pest regulation
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MORE on how ecosystems help with water purification see 
a series of scientific papers on aquatic ecosystems and water-dwelling organisms,
here:
http://5bio5.blogspot.com/2013/07/a-series-of-publications-that-developed.html


The shortest of these scientific papers was cited by scientists of 22 institutions:
http://5bio5.blogspot.com/2013/07/22-institutions-cited-this-paper-on.html

This is this short and most cited paper:

Polyfunctional role of biodiversity in processes leading to water purification: current conceptualizations and  concluding remarks. - Hydrobiologia.  Vol. 469 (1-3): pages 203-204. http://www.scribd.com/doc/52627327/