@article {1584,
	title = {Using the Ecosystems Services Approach to value air quality.},
	year = {2014},
	institution = {DEFRA},
	author = {Jones, M.L.M. and Provins, A. and Harper-Simmonds, L. and Holland, M. and Mills, G. and Hayes, F. and Emmett, B.A. and Hall, J. and Sheppard, L.J. and Smith, R. and Sutton, M. and Hicks, K. and Ashmore, M. and Haines-Young, R.}
}
@article {1679,
	title = {Inertia in an ombrotrophic bog ecosystem in response to nine years{\textquoteright} realistic perturbation by wet deposition of nitrogen, separated by form},
	year = {2013},
	author = {Sheppard, L.J. and Leith, I.D. and Mizunuma, T. and Leeson, S. and Kivimaki, S.K. and Cape, J.N. and van Dijk, N. and Leaver, D. and Sutton, M.A. and Fowler, D. and Van Den Berg, L.J.L. and Crossley, A. and Field, C. and Smart, S.M.}
}
@article {1569,
	title = {PK additions modify the effects of N dose and form on species composition, species litter chemistry and peat chemistry in a Scottish peatland.},
	volume = {116},
	year = {2013},
	pages = {39-53},
	author = {Sheppard, L.J. and Leith, I.D. and van Dijk, N. and Leeson, S. and Mizunuma, T. and De Bakker, R. and Elustando, D.E.V. and Gomez, H.G.}
}
@article {1325,
	title = {Impacts of atmospheric nitrogen deposition: responses of multiple plant and soil parameters across contrasting ecosystems in long-term field experiments},
	volume = {18},
	year = {2012},
	pages = {1197-1215},
	author = {Phoenix, G.K. and Emmett, B.A. and Britton, A.J. and Caporn, S.J.M. and Dise, N.B. and Helliwell, R. and Jones, M.L.M. and Leake, J.R. and Leith, I.D. and Sheppard, L.J. and Sowerby, A. and Pilkington, M.G. and Rowe, E.C. and Ashmore MR and Power, S.A.}
}
@article {1562,
	title = {Climatic modifiers of the response to N deposition in peat-forming Sphagnum mosses: a meta-analysis.},
	volume = {191},
	year = {2011},
	pages = {496-507},
	author = {Limpens, J. and Sheppard, L.J. and Leith, I.D.}
}
@article {1279,
	title = {Dry deposition of ammonia gas drives species change faster than wet deposition of ammonium ions: evidence from a long-term field manipulation},
	volume = {17 (12)},
	year = {2011},
	pages = {3589-3607},
	author = {Sheppard, L.J. and Leith, I.D. and Mizunuma, T. and Cape, J.N and Crossley, A. and Leeson S. and Sutton, M.A. and Fowler, D. and van Dijk, N.}
}
@article {1578,
	title = {The legacy of enhanced N and S deposition as revealed by the combined analysis of δ13C, δ18O and δ15N in tree rings.},
	volume = {17},
	year = {2011},
	pages = {1946-1962},
	author = {Guerrieri, R. and Mencuccini, M. and Sheppard, L.J. and Saurer, M. and Perks, M.P. and Levy, P. and Sutton, M.A. and Borghetti, M. and Grace, J.}
}
@article {1334,
	title = {The legacy of enhanced N and S deposition as revealed by thecombined analysis of delta 13C, delta 18O and delta 15N in treerings},
	volume = {17},
	year = {2011},
	pages = {1946{\textendash}1962},
	author = {Guerrieri, R. and Mencuccini, M. and Sheppard, L.J. and Saurer, M. and Perks,M.P. and Levy, P. and Sutton, M.A. and Borghetti, M. and Grace, J.}
}
@article {1303,
	title = {Physiological and morphological effects of long-term ammonium or nitrate deposition on green and red (shade and open grown) Sphagnum capillifolium},
	volume = {72},
	year = {2011},
	pages = {140-148},
	author = {Manninen, S. and Woods, C. and Leith, I.D. and Sheppard, L.J.}
}
@article {1283,
	title = {Evidence for changing the critical level for ammonia},
	volume = {157},
	year = {2009},
	pages = {1033-1037},
	author = {Cape, J.N and van der Eerden, L.J. and Sheppard, L.J. and Leith, I.D. and Sutton, M.A.}
}
@article {86,
	title = {Are enchytraeid worms (Oligochaeta) sensitive indicators of Ammonia-N impacts on an Ombrotrophic Bog?},
	volume = {44},
	year = {2008},
	pages = {101-108},
	author = {Prendergast, M. T. and Cole, L. and Standen, V. and Rees, R. and Parker, J. and Leith, I. and Sheppard, L.J.}
}
@inbook {1282,
	title = {Sources, dispersion and fate of atmospheric ammonia},
	booktitle = {In: Hatfield, J.L.; Follett, R.F., (eds.) Nitrogen in the Environment - Sources, Problems, and Management. Academic Press, },
	year = {2008},
	pages = {333-393.},
	author = {Dragosits, U. and Dore, A.J. and Sheppard, L.J. and Vieno, M. and Tang, Y.S. and Theobald, M.R. and Sutton, M.A.}
}
@article {87,
	title = {Stress responses of Calluna vulgaris to reduced and oxidised N applied under {\textquoteright}real world conditions{\textquoteright}},
	journal = {Environmental Pollution},
	volume = {154},
	year = {2008},
	pages = {404-413},
	author = {Sheppard, L.J. and Leith, I.D. and Crossley, A. and van Dijk, N. and Fowler, D. and Sutton, M.A. and Woods, C.}
}
@article {1280,
	title = {Stress responses of Calluna vulgaris to reduced and oxidised N applied under real world conditions},
	volume = {154 (3)},
	year = {2008},
	pages = {404-413},
	author = {Sheppard, L.J. and Leith, I.D. and Crossley, A. and van Dijk, N. and Fowler, D. and Sutton, M.A. and Woods, C.}
}
@article {1307,
	title = {Potassium and phosphorus additions modify the response of Sphagnum capillifolium growing on a Scottish ombrotrophic bog to enhanced nitrogen deposition},
	volume = {22},
	year = {2007},
	pages = {1111{\textendash}1121},
	author = {Carfrae, J. A. and Sheppard, L.J. and Raven, J.A. and Leith, I.D. and Crossley, A.}
}
@article {1277,
	title = {Diagnostic indicators of elevated nitrogen deposition},
	volume = {144},
	year = {2006},
	author = {Pitcairn, C.E.R. and Fowler D. and Leith, I.D. and Sheppard, L.J. and Tang, Y.S. and Sutton, M.A. and Famulari D.}
}
@article {1281,
	title = {An Automated Wet Deposition System to Compare the Effects of Reduced and Oxidised N on Ombrotrophic Bog Species: Practical Considerations},
	volume = {4 (6)},
	year = {2004},
	pages = {197-205},
	author = {Sheppard, L.J. and Crossley, A. and Leith, I.D. and Hargreaves, K.J. and Carfrae, J. and van Dijk, N. and Cape, J.N and Sleep, D. and Fowler, D. and Raven, J.A.}
}
@article {1284,
	title = {Quantifying dry  NH3 release system to ombrotrophic bog from an automated NH3 field release system},
	volume = {4},
	year = {2004},
	pages = {207-218.},
	author = {Leith, I.D. and Sheppard, L.J. and Fowler, D. and Cape, J.N and Jones, M.R. and Crossley, A. and Hargreaves, K.J. and Tang, Y.S. and Theobald, M.R. and Sutton, M.A.}
}
@article {659,
	title = {Comparison of the effects of dry deposited N as NH3 with wet deposited N as NH4Cl on acid moorland vegetation.},
	year = {2001},
	author = {Leith, I.D. and Sheppard, L.J. and Pitcairn, C.E.R. and Cape, J.N and Hill, P.W. and Kennedy, V.H. and Tang, Y.S. and Smith, R.I. and Fowler D.}
}
@article {760,
	title = {Early effects of acid mist on Sitka spruce planted on acid peat.},
	volume = {39},
	year = {1998},
	pages = {1-25},
	author = {Sheppard, L.J. and Crossley, A. and Harvey, F. and Parrington, J. and White, C.C.}
}
@article {717,
	title = {Effects of N additions on the stress sensitivity of Calluna vulgaris. },
	volume = {138},
	year = {1998},
	pages = {663-673},
	author = {Poser, S.A. and Ashmore, M.R. and Cousins, D. and Sheppard, L.J.}
}
@article {85,
	title = {The relationship between nitrogen deposition, species composition and foliar nitrogen concentrations in woodland flora in the vicinity of livestock farms.},
	journal = {Environmental Pollution },
	volume = {102},
	year = {1998},
	pages = {41-48},
	author = {Pitcairn, C.E.R. and Leith, I.D. and Sheppard, L.J. and Sutton, M.A. and Fowler, D. and Munro, R.C. and Tang, S. and Wilson, D.}
}
@article {251,
	title = {Soil nitrous oxide and nitric oxide emissions as indicators of the exceedance of critical loads of atmospheric nitrogen deposition in semi-natural ecosystems},
	journal = {Environmental Pollution},
	volume = {102},
	year = {1998},
	pages = {457-461},
	author = {Skiba, U. and Sheppard, L.J. and Pitcairn, C.E.R. and Leith, I.D. and Crossley, A. and van Dijk, S. and Kennedy, V.J. and Fowler, D.}
}
@article {530,
	title = {Reduced soil P availability in a Sitka spruce (Picea sitchensis (Bong) Carr) plantation induced by applied acid-mist: Significance in forest decline},
	volume = {92},
	year = {1997},
	pages = {53-166},
	author = {Carreira, J.A. and Harrison, A.F. and Sheppard, L.J. and Woods, C.}
}
@article {538,
	title = {Stem growth reductions in mature Sitka spruce trees exposed to acid mist},
	volume = {96},
	year = {1997},
	pages = {185-193},
	author = {Crossley, A. and Sheppard, L.J. and Cape, J.N and Smith, R.I. and Harvey, F.}
}
@article {1512,
	title = {Causal mechanisms by which sulphate, nitrate and acidity influence frost hardiness in red spruce: review and hypothesis.},
	volume = {127},
	year = {1994},
	pages = {69-82},
	author = {Sheppard, L.J.}
}
@article {545,
	title = {The influence of acid rain mists on growth, dry matter partitioning, nutrient concentrations and mycorrhizal fruiting bodies in red spruce seedlings.},
	volume = {115},
	year = {1994},
	pages = {459-464},
	author = {Deans, J.D. and Leith, I.D. and Sheppard, L.J. and Cape, J.N and Fowler D. and Murry, M.B. and Mason, P.A.}
}
