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	volume = {20},
	year = {2014},
	pages = {566-580},
	keywords = {ammonium, atmospheric nitrogen, boreal mire, calluna, calluna-vulgaris, chronology, cover, critical loads, dry heathland, field manipulation, global change, growth, n deposition, nitrate, peatland, plant, sphagnum bogs, sphagnum capillifolium, vegetation},
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}
@article {1708,
	title = {Detecting changes in epiphytic lichen communities at sites affected by atmospheric ammonia from agricultural sources},
	volume = {38},
	year = {2006},
	pages = {161-176},
	keywords = {acidophytes, air, ammonia, bark ph, deposition, dispersion, impacts, lichens, netherlands, nitrophytes, oak trees, pollution, recolonization, spatial variability, woodland},
	author = {Wolseley, P. A. and James, P. W. and Theobald, M. R. and Sutton, M. A.}
}
@article {1707,
	title = {Modelling the spatial distribution of ammonia emissions from seabirds in the UK},
	volume = {131},
	year = {2004},
	pages = {173-185},
	keywords = {excretion, inventory, metabolic rates, model, nitrogen, nitrogen deposition, united-kingdom, volatilisation},
	author = {Wilson, L. J. and Bacon, P. J. and Bull, J. and Dragosits, U. and Blackall, T. D. and Dunn, T. E. and Hamer, K. C. and Sutton, M. A. and Wanless, S.}
}
