@article {1549, title = {Nitrogen saturation in UK moorlands: the critical role of bryophytes and lichens in determining retention of atmospheric N deposition.}, journal = {Journal of Applied Ecology}, volume = {42}, year = {2005}, pages = {507-517}, author = {Curtis, C.J. and Emmett, B.A. and Grant, H. and Kernan, M. and Reynolds, B. and Shilland, E.} }