Eutrophication

Walker, K.J. & Preston, C.D. (2006) Ecological Predictors of Extinction Risk in the Flora of Lowland England, UK. Conservation, 15, 1913-1942.
Walker, K.J., Preston, C.D. & Boon, C.R. (2009) Fifty years of change in an area of intensive agriculture: plant trait responses to habitat modification and conservation, Bedfordshire, England. Biodiversity and Conservation, 18, 3597-3613.