@article {1496, title = {Evidence of recovery from acidification in the macroinvertebrate assemblages of UK fresh waters: A 20-year time series.}, journal = {Ecological Indicators}, volume = {37}, year = {2014}, pages = {330-340}, author = {Murphy, J.F. and Winterbottom, J.H. and Orton, S. and Simpson, G.L. and Shilland, E.M. and Hildrew, A.G.} }