Data from: Do agri-environment schemes result in improved water quality?

John Iwan Jones, John F. Murphy, Steven G. Anthony, Amanda Arnold, John H. Blackburn, Chas P. Duerdoth, Adrianna Hawczak, Greg O. Hughes, James L. Pretty, Peter D. Scarlett, Richard D. Gooday, Yusheng S. Zhang, Laura E. Fawcett, Diane Simpson, Anthony W. B. Turner, Pamela S. Naden, James Skates, J. Iwan Jones & Peter M. Scarlett
Improved water quality, through a reduction in diffuse pollution from agricultural sources, is an expected benefit of agri-environment schemes, but this has yet to be demonstrated in practice. Here, we evaluate the impact of Welsh agri-environment schemes on water quality and freshwater ecosystem condition through a combined monitoring and modelling framework. To determine the influence of the agri-environment schemes on ecosystem condition, spatially independent catchments dominated by a single scheme (>40% of catchment) were compared...
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