@article {1343,
	title = {Upwind impacts of ammonia from an intensive poultry unit},
	journal = {Environmental Pollution},
	year = {2013},
	author = {Jones, L. and Nizam, M.S. and Reynolds, B. and Oxley, E.R.B. and Bareham, S.}
}
@article {1528,
	title = {Effects of ozone on species composition in an upland grassland.},
	journal = {Oecologia},
	volume = {168},
	year = {2012},
	pages = {1137-1146},
	author = {Wedlich, K.V. and Rintoul, N. and Peacock, S. and Cape, N.J. and Coyle, M. and Toet, S. and Barnes, J. and Ashmore, M.}
}
@article {1325,
	title = {Impacts of atmospheric nitrogen deposition: responses of multiple plant and soil parameters across contrasting ecosystems in long-term field experiments},
	journal = {Global Change Biology},
	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 {1571,
	title = {Terricolous lichens as indicators of nitrogen deposition: Evidence from national records.},
	journal = {Ecological Indicators},
	volume = {20},
	year = {2012},
	pages = {196-203},
	author = {Stevens, C.J. and Smart, S.M. and Henrys, P.A. and Maskell, L.C. and Crowe, A. and Simkin, J. and Cheffings, C.M. and Whitfield, C. and Gowing, D.J.G. and Rowe, E.C. and Dore, A.J. and Emmett, B.A.}
}
@article {1299,
	title = {Collation of evidence of nitrogen impacts on vegetation in relation to UK biodiversity objectives},
	year = {2011},
	institution = {JNCC},
	issn = {447},
	author = {Stevens, C.J. and Smart, S.M. and Henrys, P. and Maskell, L.C. and Walker, K.J. and Preston, C.D. and Crowe, A. and Rowe, E. and Gowing, D.J. and Emmett, B.A.}
}
@article {1296,
	title = {Interpretation of evidence of nitrogen impacts on vegetation in relation to UK biodiversity objectives},
	number = {No. 449},
	year = {2011},
	institution = {JNCC},
	author = {Emmett, B.A. and Rowe, E.C. and Stevens, C.J. and Gowing, D.J. and Henrys, P.A. and Maskell, L.C. and Smart, S.M.}
}
@article {1556,
	title = {Nitrogen concentrations in mosses indicate the spatial distribution of atmospheric nitrogen deposition in Europe.},
	journal = {Environmental Pollution},
	volume = {159},
	year = {2011},
	pages = {2852-2860},
	author = {Harmens, H. and Norris, D.A. and Cooper, D.M. and Mills, G. and Steinnes, E. and Kubin, E. and Thoni, L. and Aboal, J.R. and Alber, R. and Carballeira, A. and Coskun, M. and De Temmerman, L. and Frolova, M. and Frontasyeva, M. and Gonzales-Miqueo, L. and Jeran, Z. and Leblond, S. and Liiv, S. and Mankovska, B. and Pesch, R. and Poikolainen, J. and Ruhling, A. and Santamaria, J.M. and Simoneie, P. and Schroder, W. and Suchara, I. and Yurukova, L. and Zechmeister, H.G.}
}
@article {1348,
	title = {Predicting effects of N pollutant load on plant species based on a dynamic soil eutrophication indicator},
	number = {977},
	year = {2011},
	pages = {39},
	institution = {Countryside Council for Wales},
	address = {Bangor},
	author = {Rowe, E.C. and Jones, M.L.M. and Henrys, P.A. and Smart, S.M. and Tipping, E. and Mills, R.T.E. and Evans, C.D.}
}
@article {1342,
	title = {UK Status Report July 2011: Update to empirical critical loads of nitrogen},
	year = {2011},
	pages = {55pp},
	author = {Hall, R.J. and Emmett, B. and Garbutt, A. and Jones, L and Rowe, E. and Sheppard, L and Vanguelova, E. and Pitman, R. and Britton, A. and Hester, A. and Ashmore, M. and Power, S. and Caporn, S.}
}
@article {1420,
	title = {Below-ground carbon allocation in mature beech and spruce trees following long-term, experimentally enhanced O3 exposure in Southern Germany},
	journal = {Environmental Pollution },
	volume = {158},
	year = {2010},
	pages = {2604-2609},
	author = {Anderson, C.P. and Ritter, W. and Gregg, J. and Matyssek, R. and Grams, T.E.E.}
}
@article {1297,
	title = {Changes in species richness and composition in European acidic grasslands over the past 70 years: the contribution of cumulative atmospheric nitrogen deposition},
	journal = {Global Change Biology},
	volume = {16},
	year = {2010},
	pages = {344-357},
	author = {Dupre, C. and Stevens, C.J. and Ranke, T. and Bleeker, A. and Peppler-Lisbach, C. and Gowing, D.J.G. and Dise, N.B. and Dorland, E. and Bobbink, R. and Diekmann, M.}
}
@article {1677,
	title = {Direct and indirect effects of nitrogen deposition on species composition change in calcareous grasslands},
	journal = {Global Change Biology},
	volume = {17},
	year = {2010},
	pages = {1871-83},
	author = {Van Den Berg, L.J.L. and Vergeer, P. and Rich, T.C.G. and Smart, S.M. and Guest, D. and Ashmore, M.R.}
}
@book {1716,
	title = {Atmospheric Ammonia - Detecting emission changes and environmental impacts},
	year = {2009},
	publisher = {Springer eBooks},
	organization = {Springer eBooks},
	author = {Sutton, M.A. and Reis, S. and Baker, S.M.H.}
}
@article {1105,
	title = {Changes in species richness and composition in European acidic grasslands over the past 70 years: the contribution of cumulative atmospheric nitrogen deposition. },
	journal = {Global Change Biology},
	volume = {161},
	year = {2009},
	pages = {344-357},
	author = {Dupre, C. and Stevens, C.J. and Ranke, T. and Bleeker, A. and Peppler-Lisbach, C, and Gowing, D.J. and Dise, N.B. and Dorland, E. and Bobbink, R. and Diekmann, M.}
}
@article {1510,
	title = {Contrasting soil pH effects on fungal and bacterial growth suggest functional redundancy in carbon mineralization.},
	journal = {Applied  and Environmental Microbiology},
	volume = {75},
	year = {2009},
	pages = {1589-1596},
	author = {Rousk, J. and Brooks, P.C. and B{\r a}{\r a}th, E.}
}
@article {1347,
	title = {Even low to medium nitrogen deposition impacts vegetation of dry, coastal dunes around the Baltic Sea},
	journal = {Environmental Pollution},
	volume = {157},
	year = {2009},
	pages = {792-800},
	author = {Remke, E. and Brouwer, E. and Kooijman, A.M. and Blindow, I. and Esselink, H. and Roelefs, J.G.M.}
}
@article {1514,
	title = {Leaf gas exchange and water potential responses to drought in nine poplar (Populus spp.) clones with contrasting drought tolerance.},
	journal = {Trees},
	volume = {23},
	year = {2009},
	pages = {959-969},
	author = {Silim, S. and Nash, R. and Reynard, D. and White, B. and Schroeder, W.}
}
@article {1346,
	title = {Low atmospheric nitrogen loads lead to grass encroachment in coastal dunes, but only on acid soils},
	journal = {Ecosystems},
	volume = {12},
	year = {2009},
	pages = {1173{\textendash}1188},
	author = {Remke, E. and Brouwer, E. and Kooijman, A. and Blindow, A. and Roelofs, J.G.M.}
}
@article {1387,
	title = {Particulate matter at a rural location in southern England during 2006: Model sensitivities to precursor emissions},
	journal = {Atmospheric Environment},
	volume = { 43},
	year = {2009},
	pages = {689-696},
	author = {Derwent, R.G. and Witham, C. and Redington, A. and Jenkin, M.E. and Stedman, J.R. and Yardley, R. and Hayman, G.}
}
@article {86,
	title = {Are enchytraeid worms (Oligochaeta) sensitive indicators of Ammonia-N impacts on an Ombrotrophic Bog?},
	journal = {European Journal of Soil Biology.},
	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.}
}
@article {1689,
	title = {Environmental and anthropogenic controls over bacterial communities in wetland soils.},
	journal = {Proceedings of the National Academy of Sciences of the United States of America},
	volume = {105},
	year = {2008},
	pages = {17842-17847},
	author = {Hartman, W.H. and Richardson, C.J. and Vilgalys, V.R. and Bruland, G.L.}
}
@article {1492,
	title = {Long-term ozone effects on vegetation, microbial community and methane dynamics of boreal peatland microcosms in open-field conditions. },
	journal = {Global Change Biology},
	volume = {14},
	year = {2008},
	pages = {1891-1903},
	author = {Morsky, S.K. and Haapala, J.K. and Rinnan, R. and Tiiva, P. and Saarnio, S. and Silvola, J. and Holopainen, T. and Martikainen, P.J.}
}
@article {1703,
	title = {Reduced nitrogen has a greater effect than oxidised nitrogen on dry heathland vegetation},
	journal = {Environmental Pollution},
	volume = {154},
	year = {2008},
	pages = {359-369},
	keywords = {acidification, amino acids, ammonium toxicity, competition, decline, deposition, grass encroachment, herbaceous species, mesocosins, n enrichiuent, netherlands, nh4+/no3- ratios, nitrate, pinus-nigra, soil, vascular plants},
	author = {Van den Berg, L. J. L. and Peters, C. J. H. and Ashmore, M. R. and Roelofs, J. G. M.}
}
@article {1286,
	title = {Short-term flux chamber experiment to quantify the  deposition of gaseous 15N-NH3 to Calluna vulgaris},
	journal = {Agricultural and Forest Meteorology, },
	volume = {148 (6-7)},
	year = {2008},
	pages = {893-901},
	author = {Jones, M.R. and Raven, J.A. and Leith, I.D. and Cape, J.N and Smith, R.I. and Fowler, D.}
}
@article {1609,
	title = {The use of biomonitoring tools to detect ecosystem response following exposure to contaminants emitted from a regulated industrial source.},
	year = {2008},
	institution = {Environment Agency},
	address = {Bristol},
	issn = {SC030175/SR3},
	author = {Long, S. and Lister, L. and Hankard, P. and Rothery, P. and Ainsworth, G. and Rowland, P. and Walker, L. and Wright, J. and Turk, T. and Bealey, B. and Leith, I. and Cape, N. and Spurgeon, D.}
}
@article {1473,
	title = {Water quality limits for Atlantic salmon (Salmo salar L.) exposed to short term reductions in pH and increased aluminum simulating episodes.},
	journal = {Hydrology and Earth System Sciences},
	volume = {12},
	year = {2008},
	pages = {491-507},
	author = {Kroglund, F. and Rosseland, B.O. and Teien, H.C. and Salbu, B. and Kristensen, T. and Finstad, B.}
}
@article {1468,
	title = {Fluxes of N2O, CH4 and CO2 in a meadow ecosystem exposed to elevated ozone and carbon dioxide for three years.},
	journal = {Environmental Pollution},
	volume = {145},
	year = {2007},
	pages = {818-828},
	author = {Kanerva, T. and Regina, K. and Ramo, K. and Ojanpera, K. and Manninen, S.}
}
@article {1504,
	title = {Growth onset, senescence, and reproductive development of meadow species in mesocosms exposed to elevated O3 and CO2.},
	journal = {Environmental Pollution},
	volume = {145},
	year = {2007},
	pages = {850-860},
	author = {Ramo, K. and Kanerva, T. and Ojanpera, K. and Manninen, S.}
}
@article {1307,
	title = {Potassium and phosphorus additions modify the response of Sphagnum capillifolium growing on a Scottish ombrotrophic bog to enhanced nitrogen deposition},
	journal = {Applied Geochemistry},
	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 {1431,
	title = {Shoot growth of mature Fagus sylvatica and Picea abies in relation to ozone.},
	journal = {Environmental Pollution},
	volume = {146},
	year = {2007},
	pages = {624-628},
	author = {Braun, S. and Schindler, C. and Rihm, B. and Fl{\"u}ckiger, W.}
}
@article {1470,
	title = {Chemical composition and decomposition of silver birch leaf litter produced under elevated CO2 and O3.},
	journal = {Plant and Soil},
	volume = {282},
	year = {2006},
	pages = {261-280},
	author = {Kasurinen, A. and Riikonen, J. and Oksanen, E. and Vapaavuori, E. and Holopainen, T.}
}
@article {1489,
	title = {Biological responses to the chemical recovery of acidified fresh waters in the UK.},
	journal = {Environmental Pollution},
	volume = {137},
	year = {2005},
	pages = {83-101},
	author = {Monteith, D.T. and Hildrew, A.G. and Flower, R.J. and Raven, P.J. and Beaumont, W.R.B. and Collen, P. and Kreiser, A.M. and Shilland, E.M. and Winterbottom, J.H.}
}
@article {1481,
	title = {Decline of acid-sensitive plant species in heathland can be attributed to ammonium toxicity in combination with low pH.},
	journal = {New Phytologist},
	volume = {166},
	year = {2005},
	pages = {551-564},
	author = {Van Den Berg, L.J. and Dorland, E. and Vergeer, P. and Hart, M.A.C. and Bobbink, R. and Roelofs, J.G.}
}
@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.}
}
@article {1281,
	title = {An Automated Wet Deposition System to Compare the Effects of Reduced and Oxidised N on Ombrotrophic Bog Species: Practical Considerations},
	journal = {Water, Air and Soil Pollution: Focus},
	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 {1102,
	title = {Changes in vegetation and soil characteristics in coastal sand dunes along a gradient of atmospheric nitrogen deposition},
	journal = {Plant Biology},
	volume = {6},
	year = {2004},
	pages = {598-605},
	author = {Jones, M.L.M. and Wallace, H.L. and Norris, D. and Brittain, S.A. and Haria, S. and Jones, R.E. and Rhind, P.M. and Reynolds, B.R. and Emmett, B.A.}
}
@article {1507,
	title = {Ozone effects on the ultrastructure of peatland plants: Sphagnum mosses, Vaccinium oxycoccus, Andromeda polifolia and Eriophorum vaginatum.},
	journal = {Annals of Botany},
	volume = {94},
	year = {2004},
	pages = {623-634},
	author = {Rinnan, R. and Holopainen, T.}
}
@article {1506,
	title = {Silver birch and climate change: variable growth and carbon allocation responses to elevated concentrations of carbon dioxide and ozone.},
	journal = {Tree Physiology},
	volume = {24},
	year = {2004},
	pages = {1227-1237},
	author = {Riikonen, J. and Lindsberg, M.M. and Holopainen, T. and Oksanen, E. and Lappi, J. and Peltonen, P. and Vapaavuori, E.}
}
@article {1326,
	title = {Effects of enhanced nitrogen deposition and phosphorus limitation on nitrogen budgets of semi-natural grasslands},
	journal = {Global Change Biology},
	volume = {9},
	year = {2003},
	pages = {1309-1321},
	author = {Phoenix, G.K. and Booth, R.E. and Leake, J.R. and Read, D.J. and Grime, J.P. and Lee, J.A.}
}
@article {1305,
	title = {Stimulated growth of Betula pubescens and Molinia caerulea on ombrotrophic bogs: role of high levels of atmospheric nitrogen deposition},
	journal = {Journal of Ecology},
	volume = {91},
	year = {2003},
	pages = {357-370},
	author = {Tomassen, H.B.M. and Smolders, A.J.P. and Lamers,  L.P.M. and Roelofs, J.G.M.}
}
@article {637,
	title = {Changing nutrient budget of sand dunes: consequences for the nature conservation interest and dune management. 1 },
	number = {CCW No. FC 73-01-347},
	year = {2002},
	month = {March 2002. },
	author = {Jones, M.L.M. and Reynolds, B. and Stevens, P.A. and Norris, D.A.}
}
@article {1960,
	title = {Effects of manganese on the viability of vegetative diaspores of the epiphytic lichen Hypogymnia physodes},
	journal = {Environmental and Experimental Botany},
	year = {2002},
	pages = {127-142},
	author = {Hauck, M and Paul, A and Mulack, C and Fritz, E and Runge, M}
}
@article {1508,
	title = {Effects of nutrient addition and acidification on plant species diversity and seed germination in heathland.},
	journal = {Journal of Applied Ecology},
	volume = {39},
	year = {2002},
	pages = {937-948},
	author = {Roem, W.J. and Klees, H. and Berendse, F.}
}
@article {1874,
	title = {Plant uptake of cadmium, zinc and manganese from four contrasting soils amended with Cd-enriched sewage sludge},
	journal = {Journal of Environmental Science and Health},
	year = {2002},
	pages = {1337-1346},
	author = {Ramachandran, V and D{\textquoteright}Souza, T. J}
}
@article {1543,
	title = {Aluminium toxicity in plants: a review},
	journal = {Agronomie},
	volume = {21},
	year = {2001},
	pages = {3-21},
	author = {Rout, G.R. and Samantaray, S. and Das, P.}
}
@article {1471,
	title = {An analysis of the structure of the simple mass balance equation: implications for testing national critical loads maps.},
	journal = {Water, Air and Soil Pollution},
	volume = {1},
	year = {2001},
	pages = {281-298},
	author = {Kennedy, F. and Rowell, D. and Moffat, A.J. and Singh, B.}
}
@article {171,
	title = {Atmospheric Heavy Metals and Forest Ecosystems},
	year = {2001},
	institution = {UN/ECE},
	address = {Geneva},
	author = {Rademacher, P.}
}
@article {2006,
	title = {Beneficial effects of the growth of metal tolerant grass on biological and chemical parameters in copper and zinc contaminated sandy soils},
	journal = {Minerva Biotecnologica},
	year = {2001},
	pages = {9-26},
	author = {Bouwman, L. A and Bloem, J and Romkens, P. F. A. M and Boon, G. T and Vangronsveld, J}
}
@article {781,
	title = {Biosphere-atmosphere interactions of ammonia with grasslands: experimental strategy and results from a new European initiative},
	journal = {Plant and Soil },
	volume = {228 (1)},
	year = {2001},
	pages = {131-145},
	author = {Sutton, M.A. and Milford, C. and Nemitz, E. and Theobald, M.R. and Fowler D. and Schjoerring, J.K. and Mattsson, M.E. and Nielsen, K.H. and Husted, S. and Erisman, J.W. and Oties, R. and Hensen, A. and Mosquera, J. and Cellier, P. and Loubert, B. and David, M. and Genermont, S. and Neftel, A. and Blatter, A. and Herrmann, B. and Jones, S.K. and Horvath, L. and Flhrer, E. and Mantzanas, K. and Koukoura, Z. and Gallagher, M. and Williams, P. and Flynn, M. and Riedo, M.}
}
@article {733,
	title = {Changes in urban lichen diversity after a fall in sulphur dioxide levels in the city of Tampere, SW Finland.},
	journal = {Annales Botanici Fennici },
	volume = {38(4)},
	year = {2001},
	pages = {295-304},
	author = {Ranta, P.}
}
@article {577,
	title = {Deposition of acidifying and eutrophying air pollutants in Scotland: Mapping critical loads, critical levels and exceedances},
	year = {2001},
	institution = {Centre for Ecology and Hydrology},
	author = {Fowler, D. and Dragosits, U. and Pitcairn, C.E.R. and Sutton, M.A. and Hall, J. and Roy, D.B. and Weidemann, A.}
}
@article {510,
	title = {Raised atmospheric CO2 levels and increased N deposition cause shifts in plant species composition and production in Sphagnum bogs},
	journal = {Global Change Biology },
	volume = {7},
	year = {2001},
	pages = {591-598},
	author = {Berendse, F. and van Breeman, N. and Rydin, H. and Buttler, A. and Heijmans, M. and Hoosbeek, M.R. and Lee, J.A. and Mitchel, E. and Saarinen, T. and Vasander, H. and Wallin, B.}
}
@article {1961,
	title = {Relevance of element content of bark for the distribution of epiphytic licehns in a montane spruce forest affected by forest dieback},
	journal = {Environmental Pollution},
	year = {2001},
	pages = {221-227},
	author = {Hauck, M and Jung, R and Runge, M}
}
@article {1937,
	title = {Studies on differential manganese tolerance of mung bean and rice genotypes in hydroponic culture},
	journal = {Agronomie },
	year = {2001},
	pages = {725-733},
	author = {Rout, G. R and Samantaray, S and Das, P}
}
@inbook {620,
	title = {Terrestrial ecosystem research in Europe: successes, challenges and policy},
	year = {2001},
	note = {Final Conference of the Terrestrial Ecosystem Research Initiative - Concerted Action (TERICA) Project ENV4-CT95-0051
Egmond aan Zee, the Netherlands, 20-23 June 1999. },
	publisher = {Directorate-General for Research},
	organization = {Directorate-General for Research},
	chapter = {Preliminary results of the BERI project: Effects of elevated CO2 and N deposition on plant dynamics and CH4 emissions of five},
	address = {Brussels.},
	author = {Hoosebeak, M.R. and van Breeman, N. and Wallen, B. and Rydin, H. and Lee, J.A. and Sivola, J. and Vasander, H. and Berendse, F. and Grosvernier, P. and Sutton, M.A. (Eds) and Moreno, J.M. (Eds) and Van der Putten, W.H. (Eds) and Struwe, S. (Eds)}
}
@article {539,
	title = {Critical loads of sulphur and nitrogen for freshwaters in Great Britain and assessment of deposition reduction requirements with the First-order Acidity Balance (FAB) model},
	journal = {Hydrology And Earth System Sciences},
	volume = {4},
	year = {2000},
	pages = {125-140},
	author = {Curtis, C. and Allott, T. and Hall, J. and Harriman, R. and Helliwel, R. and Hughes, M. and Kernan, M. and Reynolds, B. and Ullyett, J.}
}
@article {737,
	title = {Healthy river habitats fit for wildlife: Deriving the physical dimension. },
	journal = {Journal of the Chartered Institution of Water and Environmental Management},
	volume = {14},
	year = {2000},
	pages = {235-239},
	author = {Raven, P.J. and Naura, M. and Holmes, N.T.H. and Dawson, F.H.}
}
@article {1430,
	title = {Impact of ozone on the reproductive development of plants. },
	journal = {New Phytologist},
	volume = {147},
	year = {2000},
	pages = {421-447},
	author = {Black, V.J. and Black, C.R. and Roberts, J.A. and Stewart, C.A.}
}
@article {596,
	title = {Nitrogen fertilization reduces Sphagnum production in bog communities},
	journal = {New Phytologist},
	volume = {147},
	year = {2000},
	pages = {527-537},
	author = {Gunnarsson, U. and Rydin, H.}
}
@article {827,
	title = {Responses of spruce seedlings (Picea abies) to exhaust gas under laboratory conditions - I - plant-insect interactions. },
	journal = {Environmental Pollution},
	volume = {107},
	year = {2000},
	pages = {89-98},
	author = {Viskari, E.L. and Surakka, J. and Pasanen, P. and Mirme, Am. and Ruuskanen, J. and Holopainen, J. K.}
}
@article {1904,
	title = {Distribution in Portugal of some pollutants in the lichen Parmelia sulcata},
	journal = {Environmental Pollution},
	year = {1999},
	pages = {229-235},
	author = {Freitas, M. C and Reis, M. A and Alves, L. C and Wolterbeek, H. T}
}
@article {732,
	title = {Do acid rain and calcium supply limit eggshell formation for blue tits (Parus caeruleus) in the UK? },
	journal = {Journal of Zoology},
	volume = {247},
	year = {1999},
	pages = {121-125},
	author = {Ramsay, S.L. and Houston, D.C.}
}
@article {531,
	title = {The effect of increased deposition of atmospheric N on Cv in upland Britain. },
	journal = {New Phytol},
	volume = {141},
	year = {1999},
	pages = {423-431},
	author = {Carroll, J.A. and Caporn, S.J.M and Cawley, L. and Read, D.J. and Lee, J.A.}
}
@book {614,
	title = {Ellenberg{\textquoteright}s indicator values for British plants: ECOFACT volume 2 technical annex.},
	year = {1999},
	publisher = {HMSO},
	organization = {HMSO},
	author = {Hill, M.O. and Mountford, J.O. and Roy, D.B. and Bunce, R.G.H.}
}
@article {1954,
	title = {Environmental effects of manganese and proposed freshwater guidelines to protect aquatic life in British Columbia},
	number = {50},
	year = {1999},
	institution = {Department of Chemical \& Bio-Resource Engineering, Bio-resource Engineering Program, University of British Columbia},
	author = {Reimer, P. S}
}
@article {480,
	title = {Global amphibian declines: A problem in applied ecology},
	volume = {30},
	year = {1999},
	pages = {133-165},
	author = {Alford, R.A. and Richards, S.J.}
}
@article {1509,
	title = {Methane release from peat soils: effects of Sphagnum and Juncus.},
	journal = {Soil Biology \& Biochemistry},
	volume = {31},
	year = {1999},
	pages = {323-325},
	author = {Roura-Carol, M. and Freeman, C.}
}
@article {714,
	title = {Ozone stimulates protonematal growth and gametophore production in Polytrichum commune},
	journal = {Bryologist},
	volume = {102},
	year = {1999},
	pages = {398-403},
	author = {Petersen, R. and Bosley, A. and Rebbeck, J.}
}
@article {514,
	title = {The resistance of the moss Polytrichum commune to acute exposure of simulated acid rain or ozone compared to two fern species: Spore germination},
	journal = {Bryologist},
	volume = {101},
	year = {1999},
	pages = {512-518},
	author = {Bosley, A. and Petersen, R. and Rebbeck, J.}
}
@article {563,
	title = {Air pollution fades the plumage of the Great Tit},
	journal = {Functional Ecology},
	volume = {12},
	year = {1998},
	pages = {607-612},
	author = {Eeva, T. and Lehikoinen E. and Rvnkd, M.}
}
@article {266,
	title = {Climate change and Scotland{\textquoteright}s Natural Heritage - An environmental audit},
	year = {1998},
	institution = {Scottish Natural Heritage},
	address = {Battleby},
	author = {Hill, M.O. and Downing, T.E. and Berry, P.M. and Coppins, B.J. and Hammond, P.S. and Marquiss, M. and Roy, D.B. and Telfer, M.G. and Welch, D.}
}
@article {742,
	title = {Consequences of high loads of nitrogen for spruce (Picea abies) and beech (Fagus sylvatica) forests. },
	journal = {New Phytologist},
	volume = {139},
	year = {1998},
	pages = {71-89},
	author = {Rennenberg, H. and Kreutzer, K. and Papen, H. and Weber, P.}
}
@article {547,
	title = {Differential effects of ammonium nitrate on three heathland species},
	journal = {Plant Ecology},
	volume = {135},
	year = {1998},
	pages = {185-196},
	author = {De Graaf, M.C.C. and Bobbink, R. and Roelofs, J.G.M. and Verbank, P.J.M.}
}
@article {22,
	title = {Dispersion, deposition and impacts of atmospheric ammonia: quantifying local budgets and spatial variability},
	journal = {Environmental Pollutution (Nitrogen Conference Special Issue)},
	volume = {102},
	year = {1998},
	pages = {349-361},
	chapter = {1},
	author = {Sutton, M.A. and Milford, C. and Dragosits, U. and Place, C.J. and Singles, R.J. and Smith, R.I. and Pitcairn, C.E.R. and Fowler, D. and Hill, J. and ApSimon, H.M. and Ross, C. and Hill, R. and Jarvis, S.C. and Pain, B.F. and Phillips, V.C. and Harrison, R. and Moss, D. and Webb, J. and Espenhahn, S.E. and Lee, D.S. and Hornung, M. and Ullyett, J. and Bull, K.R. and Emmett, B.A. and Lowe, J. and Wyers, G.P.}
}
@article {1445,
	title = {The effect of air pollution from nitrogen dioxide (NO2) on epiphytic lichens in Seville, Spain.},
	journal = {Aerobiolobia},
	volume = {14},
	year = {1998},
	pages = {241-247},
	author = {Funetes, J.M.C. and Rowe, J.G.}
}
@article {223,
	title = {The effects of air-borne nitrogen pollutants on species diversity in natural and semi-natural European vegetation},
	journal = {Journal of Ecology},
	volume = {86},
	year = {1998},
	pages = {717-738},
	author = {Bobbink, R. and Hornung, M. and Roelofs, J.G.M.}
}
@article {706,
	title = {Effects of experimental acidification and liming on terrestrial invertebrates: implications for calcium availability to vertebrates},
	journal = {Environmental Pollution},
	volume = {103},
	year = {1998},
	pages = {183-191},
	author = {Ormerod, S.J. and Rundle, S.D.}
}
@article {58,
	title = {Fluoride. In: Recognition of Air Pollutant Injury to Vegetation: A Pictorial Atlas. 2nd Edition},
	year = {1998},
	pages = {pp 4-1 to 4-27},
	institution = {Air \& Waste Management Association},
	address = {Pittsburgh, PA},
	author = {Weinstein, L.H. and Davison, A.W. and Arndt, U.}
}
@mastersthesis {1304,
	title = {Impacts of nitrogen on Sphagnum dominated bogs with emphasis on critical load assessment},
	year = {1998},
	school = {Department of Plant Ecology, Botanical Institute, University of Copenhagen},
	author = {Risager, M.}
}
@article {278,
	title = {The nitrogen content of upland rivers in Britain: the significance of organic N},
	journal = {IAHS Publ.},
	volume = {248},
	year = {1998},
	pages = {443-450},
	author = {Chapman, P.J. and Edwards, A.C. and Reynolds, C. and Cresser, M. and Neal, C.}
}
@article {57,
	title = {Peroxyacetyl nitrates (PAN) and other minor pollutants},
	journal = {Recognition of Air Pollutant Injury to Vegetation: A Pictorial Atlas. 2nd Edition. Air \& Waste Management Association, Pittsburgh, PA.},
	year = {1998},
	pages = {pp 6-1 to 6-2},
	author = {Temple, P.J. and Sun, J.E-J. and Krause, G.H.M.}
}
@article {1876,
	title = {The phytoavailability of cadmium to lettuce in long-term biosolids-amended soils},
	journal = {Journal of Environmental Quality},
	year = {1998},
	pages = {1071-1078},
	author = {Brown, S. L and Chaney, R. L and Angle, J. S and Ryan, J. A}
}
@article {748,
	title = {The quality of shallow groundwaters in Northern Ireland},
	journal = {Journal of the Chartered Institution of Water and Environmental Management },
	volume = {12},
	year = {1998},
	pages = {163-169},
	author = {Robins, N.S.}
}
@article {1115,
	title = {Acid Deposition in the United Kingdom 1992-1994},
	year = {1997},
	author = {Review Group on Acid Rain}
}
@article {154,
	title = {Acid Deposition in the United Kingdom 1992-1994},
	year = {1997},
	author = {Review Group on Acid Rain}
}
@article {1843,
	title = { Association of antimony with traffic - occurrence in airborne dust, deposition and accumulation in standardized grass cultures},
	journal = {Science of the Total Environment },
	year = {1997},
	pages = { 235-244},
	author = {Dietl, C and Reifenhauser, W and Peichl, L}
}
@article {1329,
	title = {Natural vegetation responses to atmospheric nitrogen deposition - critical levels and loads of nitrogen for vegetation growing on contrasting native soils},
	year = {1997},
	institution = {University of Sheneld},
	address = {Sheneld},
	author = {Carroll, J.A. and Caporn, S.J.M. and Morecrof, M.D. and Lee, J.A. and Johnson, D. and Taylor, A. and Leake, J.R. and Campbell, C.D. and Cawley, L. and Lei, Y. and Read, D.J.}
}
@article {207,
	title = {Adverse health effects due to soil water acidification: a Swedish research programme},
	journal = {Ambio},
	volume = {25},
	year = {1996},
	pages = {527-531},
	author = {Oskarsson, A. and Nordberg, G. and Block, M. and Rasmussen, F. and Petterson, R. and Skerfving, S. and Vahter, M. and Wicklund-Glynn, A. and Oborn, I. and Heikensten, M.L. and Thuvander, A.}
}
@article {670,
	title = {Assessing the critical load of SO2 for Scots Pine in situ. },
	journal = {Environmental Pollution},
	volume = {93},
	year = {1996},
	pages = {27-38},
	author = {Manninen, S. and Huttunen, S. and Rautio, P. and Peramaki, P.}
}
@article {660,
	title = {A critical limit for acid neutralizing capacity in Norwegian surface waters, based on new analyses of fish and invertebrate responses},
	journal = {Science of the Total Environment },
	volume = {177},
	year = {1996},
	pages = {173-193.},
	author = {Lien, L. and Raddum, G.G. and Fjellheim, A. and Henriksen, A.}
}
@article {711,
	title = {The effects of different ozone exposures on three contrasting populations of Plantago major L. },
	journal = {New Phytologist},
	volume = {132},
	year = {1996},
	pages = {493-502},
	author = {Pearson, S. and Davison, A.W. and Reiling, K. and Ashenden, T.W. and Ollerenshaw, J.H.}
}
@article {1322,
	title = { Empirical nitrogen critical loads for natural and semi-natural ecosystems},
	year = {1996},
	pages = {71-96. },
	institution = {Umweltbundesamt},
	address = {Berlin},
	author = {Bobbink, R. and Hornung, M. and Roelofs, J.G.M.}
}
@article {48,
	title = {Fluoride in Small Mammals. In: Environmental Contaminants in Wildlife: Interpreting Tissue Concentrations},
	journal = {Society of Environmental Toxicology and Chemistry Special Publication. Lewis, Boca Raton},
	volume = {22},
	year = {1996},
	pages = {473-482},
	author = {Cooke, J.A. and Boulton, I.C. and Johnson, M.S.},
	editor = {Beyer, N. and Heinz, G; and Redmon-Norwood, A.}
}
@article {169,
	title = {Growth variation of Scots Pine across a pollution gradient on the Kola peninsula, Russia},
	journal = {Environmental Pollution },
	volume = {93},
	year = {1996},
	pages = {313-325},
	author = {Nojd, P. and Reames, G.A.}
}
@article {1474,
	title = {Quantitative relationships of invertebrates to pH in Norwegian river systems.},
	journal = {Hydrobiologica},
	volume = {328},
	year = {1996},
	pages = {57-74},
	author = {Larsen, J. and Birksl, H.J.B, and Raddum, G. and Fjellheim, A.}
}
@inbook {1565,
	title = {Responses of plants to atmospheric sulphur.},
	booktitle = {Plant response to air pollution},
	year = {1996},
	pages = {285-294},
	publisher = {John Wiley \& Sons},
	organization = {John Wiley \& Sons},
	address = {Chichester},
	author = {Rennenberg, H. and Herschbach, C.}
}
@article {484,
	title = {Allocation of carbon in mycorrhizal Pinus ponderosa seedlings exposed to ozone.},
	journal = {New Phytologist },
	volume = {131},
	year = {1995},
	pages = {471-480},
	author = {Anderson, C.P. and Rygiewicz, P.T.}
}
@article {37,
	title = {Alternatives to CFCs and their behaviour in the atmosphere. In; Volatile Organic Compounds in the Atmosphere},
	journal = {Issues in Environmental Science and Technology, The Royal Society of Chemistry. Cambridge UK},
	volume = {4},
	year = {1995},
	pages = {pp 91-108},
	author = {Midgley, PA},
	editor = {Re, Hester and RM, Harrison}
}
@article {691,
	title = {Critical levels of O-3 for wood production of European beech (Fagus sylvatica L). },
	journal = {Water, Air and Soil Pollution},
	volume = {85},
	year = {1995},
	pages = {1349-1354},
	author = {Mortensen, L. and BastrubBirk, A. and RoPoulsen, H.}
}
@article {1503,
	title = {Critical limits of acidification to invertebrates in different regions of Europe.},
	journal = {Water Air and Soil Pollution},
	volume = {85},
	year = {1995},
	pages = {475-480},
	author = {Raddum, G. and Skjelkvale, B.L.}
}
@article {528,
	title = {The effect of repeated N fertlization on mye infection in heather (Calluna vulgaris (L) Hull)},
	journal = {New Phytol},
	volume = {129},
	year = {1995},
	pages = {605-609},
	author = {Caporn, S.J.M and Song, W. and Read, D.J. and Lee, J.A.}
}
@article {159,
	title = {Empirical nitrogen critical loads: update since Lokeberg (1992)},
	year = {1995},
	pages = {9-19},
	institution = {Institute of Terrestrial Ecology},
	address = {Bush},
	author = {Bobbink, R. and Roelofs, J.G.M.},
	editor = {Hornung, M. and Sutton, M.A. and Wilson, R.B.}
}
@article {907,
	title = {Mapping and modelling of critical loads for nitrogen - a workshop report},
	year = {1995},
	pages = {9-19},
	institution = {Institute of Terrestrial Ecology},
	chapter = {Empirical nitrogen critical loads: update since Lokeberg (1992).},
	address = {Bush},
	author = {Bobbink, R. and Roelofs, J.G.M. and Hornung, M. (Eds) and Sutton, M.A. (Eds) and Wilson, R.B. [Eds.]}
}
@article {170,
	title = {Mycorrhizal studies of a Scots Pine plantation affected by pollution from a phosphate fertiliser plant},
	journal = {Water, Air and Soil Pollution},
	volume = {85},
	year = {1995},
	pages = {1281-1286},
	author = {Rudawska, M. and Kieliszewska-Rocicka, B. and Leski, T. and Oleksyn, J.}
}
@article {156,
	title = {Nitrogen critical loads for natural and semi-natural ecosystems: the empirical approach},
	journal = {Water, Air and Soil Pollution},
	volume = {85},
	year = {1995},
	pages = {2413-2418},
	author = {Bobbink, R. and Roelofs, J.G.M.}
}
@article {540,
	title = {A rapid change in ozone resistance of Plantago major after summers with high ozone concentrations},
	journal = {New Phytologist },
	volume = {131},
	year = {1995},
	pages = {227-343},
	author = {Davison, A.W. and Reiling, K.}
}
@article {731,
	title = {Relation between sulphur concentrations in Scots Pine needles and the air in northernmost Europe. },
	journal = {Water, Air and Soil Pollution},
	volume = {85},
	year = {1995},
	pages = {1361-1366},
	author = {Raitio, H. and Tuovinen, J.P. and Anttila, P.}
}
@article {739,
	title = {Relationships between afforestation, water chemistry and fish stocks in an upland catchment in south west Scotland.},
	journal = {Water, Air and Soil Pollution},
	volume = {85},
	year = {1995},
	pages = {303-308},
	author = {Rees, R. and Ribbens, J.H.C.}
}
@article {604,
	title = {Response of zooplankton, benthos and fish to acidification: an overview},
	journal = {Water, Air and Soil Pollution},
	volume = {85},
	year = {1995},
	pages = {51-62},
	author = {Havas, M. and Rosseland, B.O.}
}
@inbook {622,
	title = {Acid Rain and its Impact: The Critical Loads Debate.},
	year = {1994},
	pages = {43-51},
	publisher = {Environmental Change Research Centre/ENSIS},
	organization = {Environmental Change Research Centre/ENSIS},
	chapter = {Mapping critical loads for the soils of Great Britain},
	address = {London},
	author = {Hornung, M. and Bull, K.R. and Cresser, M.S. and Loveland, P.J. and Langan, S.J. and Reynolds, B. and Robertson, W.H. and Battarbee, R.W. (Eds)}
}
@inbook {527,
	title = {Acid Rain and its Impact: The Critical Loads Debate},
	year = {1994},
	pages = {146-150},
	publisher = {Environmental Change Research Centre/ENSIS},
	organization = {Environmental Change Research Centre/ENSIS},
	chapter = {Critical loads of nitrogen for upland heather (Calluna vulgaris). },
	address = {London},
	author = {Caporn, S.J.M and Carroll, J. and Lei, Y. and Song, W. and Read, D.J. and Lee, J.A. and Battarbee, R.W. (Eds)}
}
@article {730,
	title = {Acidification of freshwater ecosystems: implications for the future. Environmental Sciences Research Report},
	volume = {ES14},
	year = {1994},
	pages = {345-354},
	institution = {John Wiley and Sons},
	chapter = {Invertebrate community changes caused by reduced acidification},
	address = {Chitchester},
	author = {Raddum, G.G. and Fjeilheim, A. and Steinberg, C.E.W. (Eds) and Wright, R.F. (Eds)}
}
@inbook {753,
	title = {Acidification of freshwater ecosystems: implications for the future},
	volume = {ES14},
	year = {1994},
	pages = {227-246},
	publisher = {John Wiley and Sons},
	organization = {John Wiley and Sons},
	chapter = {Physiological mechanisms for toxic effects and resistance to acidic water: an ecophysiological and ecotoxicological approach},
	address = {Chitchester},
	author = {Rosseland, B.O. and Staurnes, M. and Steinberg, C.E.W. (Eds) and Wright, R.F. (Eds)}
}
@article {1897,
	title = {Chromium in swiss chard grown on soil amended with tannery meal fertilizer},
	journal = {Chemosphere},
	year = {1994},
	pages = {717-720},
	author = {Grubinger, V. P and Gutenmann, W. H and Doss, G. J and Rutzke, M and Lisk, D. J}
}
@article {738,
	title = {The Demographic Consequences of Nitrogen-Fertilization of a Population of Sundew, Drosera-Rotundifolia},
	journal = {Acta Botanica Neerlandica},
	volume = {43(2)},
	year = {1994},
	pages = {175-188},
	author = {Redbotorstensson, P.}
}
@article {191,
	title = {Group report: are chemical and biological changes reversible?},
	number = {Environmental Sciences Report ES14},
	year = {1994},
	pages = {375-391},
	institution = {John Wiley and Sons},
	address = {Chichester},
	author = {Dise, N.B. and Ahlf, W. and Brahmer, G. and Cosby, B.J. and Fott, J. and Hauhs, M. and Juttner, I. and Kreutzer, K. and Raddum, G.G. and Wright, R.F.},
	editor = {Steinberg, C.E.W. and Wright, R.F.}
}
@article {734,
	title = {Interactions between exposure to O3 and nutrient uptake, growth, mycorrhizal and needle ultra-structure.},
	journal = {New Phytologist},
	volume = {128},
	year = {1994},
	pages = {679-687},
	author = {Rantanen, L. and Palomaki, V and Holopainen, T.}
}
@article {745,
	title = {): A survey of the threat of surface water acidification to the nature conservation interest of fresh-waters on Sites of Special Scientific Interest in Britain},
	journal = {Aquatic Conservation - Marine and Freshwater Ecosystems },
	volume = {4},
	year = {1994},
	pages = {31-44},
	author = {Rimes, C.A. and Farmer, A.M. and Howell, D.l.}
}
@article {295,
	title = {Dissolved inorganic nitrogen budget for a forested catchment at Beddgelert, North Wales},
	journal = {Environmental Pollution},
	volume = {80},
	year = {1993},
	pages = {1-8},
	author = {Stevens, P.A. and Williams, T.G. and Norris, D.A. and Rowland, A.P.}
}
@article {1463,
	title = { Distribution and decline of endangered herbaceous heathland species in relation to the chemical composition of the soil},
	journal = {Plant and Soil},
	volume = {148},
	year = {1993},
	pages = {137-143},
	author = {Houdijk, A.L.F.M. and Verbank, P.J.M. and van Dijk, H.F.G. and Roelofs, J.G.M.}
}
@proceedings {222,
	title = {Nitrogen eutrophication and critical load for nitrogen based upon changes in flora and fauna in (semi)-natural terrestrial ecosystems},
	year = {1993},
	pages = {pp. 111-159},
	publisher = {Nordic Council of Ministers, Copenhagen, Denmark},
	address = {L{\"o}keberg, Sweden},
	author = {Bobbink, R. and Boxman, D. and Fremstad, E. and Heil, G. and Houdijk, A. and Roelofs, J.}
}
@article {743,
	title = {Review of the impact of current and future acid deposition in Wales},
	year = {1993},
	publisher = {Institute of Terrestrial Ecology},
	address = {Bangor},
	author = {Reynolds, B. and Ormerod, S.J.}
}
@article {211,
	title = {Terrestrial SSSIs at risk from acidification in Scotland},
	year = {1993},
	institution = {Scottish Natural Heritage},
	address = {Perth},
	author = {Ross, A.}
}
@article {1505,
	title = {Effects of a short ozone exposure given at different stages in the development of Plantago major L.},
	journal = {New Phytologist},
	volume = {121},
	year = {1992},
	pages = {643-647},
	author = {Reiling, K. and Davison, A.W.}
}
@article {749,
	title = {Effects of acid precipitation, fertilisation and liming on the ground vegetation in coniferous forests of southern Germany},
	journal = {Water, Air and Soil Pollution},
	volume = {61},
	year = {1992},
	pages = {279-294},
	author = {Rodenkirchen, H.}
}
@article {741,
	title = {Spatial variation in ozone resistance of British populations of Plantago major L. },
	journal = {New Phytologist},
	volume = {122},
	year = {1992},
	pages = {699-708},
	author = {Reiling, K. and Davison, A.W.}
}
@article {1649,
	title = {The yield of winter cereals exposed to sulphur dioxide under field conditions.},
	journal = {Agriculture, Ecosystems and Environment},
	volume = {33},
	year = {1991},
	pages = {193-213},
	author = {McLeod, A.R. and Roberts, T.M. and Alexander, K. and Cribb, D.M.}
}
@article {1530,
	title = {Afforestation and Lake Acidification: A Comparison of Four Sites in Scotland.},
	journal = {Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences},
	volume = {327},
	year = {1990},
	pages = {337-383},
	author = {Kreiser, A.M. and Appleby, P.G. and Natkanski, J. and Rippey, B. and Battarbee, R.W.}
}
@article {507,
	title = {Decline of the natterjack toad Bufo clamita in Britain: Paleoecological, documentary and experimental evidence for breeding site acidification},
	journal = {Biological Conservation},
	volume = {53},
	year = {1990},
	pages = {1-20},
	author = {Beebee, T.J.C. and Flower, R.J. and Stevenson, A.C. and Patrick, S.T. and Appleby, P.G. and Fletcher, C. and Marsh, C. and Natkanski, J. and Rippey, B. and Batterby, R.}
}
@article {1287,
	title = {Effects of ammonia, ammonium sulphate and sulphur dioxide on the frost sensitivity of Scots pine (Pinus sylvestris L.)},
	journal = {Water Air Soil Pollution},
	volume = {54 },
	year = {1990},
	pages = {35-49},
	author = {Dueck, T.A. and Dor{\`e}l, F.G. and Horst R.T. and Van der Eerden, L.J.M.}
}
@article {489,
	title = {Effects of nitrogen dioxide pollution on the growth of 3 fern species.},
	journal = {Environmental Pollution },
	volume = {66},
	year = {1990},
	pages = {301-308},
	author = {Ashenden, T.W. and Bell, S.A. and Rafarel, C.R.}
}
@article {683,
	title = {Growth, ectomycorrhizae and nonstructural carbohydrates of loblolly pine seedlings exposed to ozone and soil water defect},
	journal = {Environment Pollution },
	volume = {64},
	year = {1990},
	pages = {11-27},
	author = {Meier, S. and Grand, L.F. and Schoeneberger, M.M. and Reinart, R.A.}
}
@article {118,
	title = {Sediment chemistry and atmospheric contamination},
	journal = {Philosophical Transactions of the Royal Society London B},
	volume = {327},
	year = {1990},
	pages = {311-317},
	author = {Rippey, B.}
}
@article {276,
	title = {Successional changes in the soft-water macrophyte vegetation of (sub)atlantic, sandy, lowland regions during this century},
	journal = {Freshwater Biology},
	volume = {24},
	year = {1990},
	pages = {287-294},
	author = {Arts, G.H.P. and Van der Velde, G. and Roelofs, J.G.M. and Van Swaay, C.A.M.}
}
@article {248,
	title = {On the use of mosses (Hylocomium splendens and Pleurozium schreberi) for estimating atmospheric trace metal deposition},
	journal = {Water, Air and Soil Pollution},
	volume = {50},
	year = {1990},
	pages = {63-76},
	author = {Ross, H.B.}
}
@article {615,
	title = {Wildlife toxicology},
	journal = {Environmental Science and Technology},
	volume = {24},
	year = {1990},
	pages = {276-283},
	author = {Hoffman, D.J. and Rattner, B.A. and Hall, R.J.}
}
@article {1947,
	title = {Acute toxicity of six metals to the rotifer Brachionus calyciflorus, with comparisons to other freshwater organisms},
	journal = {Toxicity Assessment},
	year = {1989},
	pages = {451-462},
	author = {Couillard, Y and Ross, P and Pinel-Alloul, B}
}
@article {313,
	title = {Air pollution - Historical trends},
	journal = {Durability of Building Materials},
	volume = {5},
	year = {1988},
	pages = {291-308},
	author = {Brimblecombe, P. and Rodhe, H.}
}
@book {1964,
	title = {Determination of plant-available soil manganese},
	series = {Manganese in soils and plants},
	year = {1988},
	pages = {87-98},
	publisher = {Kluwer Publishers},
	organization = {Kluwer Publishers},
	address = {Dordrecht},
	author = {Reisenauer, H. M}
}
@inbook {736,
	title = {Ecological Change in the Uplands},
	year = {1988},
	pages = {9-36},
	publisher = {Blackwell Scientific Publications},
	organization = {Blackwell Scientific Publications},
	chapter = {The British Uplands: their ecological character and international significance. },
	address = {Oxford},
	author = {Ratcliffe, D.A. and Thompson, D.B.A. and Usher, M.B. (Eds) and Thompson, D.B.A. (Eds)}
}
@article {256,
	title = {Effects of excessive ammonium deposition on the nutritional status and condition of pine needles},
	journal = {Physiologia Plantarum},
	volume = {73},
	year = {1988},
	pages = {494-501},
	author = {van Dijk, H.F.G. and Roelofs, J.G.M.}
}
@book {60,
	title = {Lake Acidification in the United Kingdom 1800-1986},
	year = {1988},
	publisher = {ENSIS Publishing},
	organization = {ENSIS Publishing},
	address = {London},
	author = {Battarbee, R.W. and Anderson, N.J. and Appleby, P.G. and Flower, R.J. and Fritz, S.C. and Haworth, E.Y. and Higgitt, S. and Jones, V.J. and Kreiser, A. and Munro, M.A.R. and Natkanski, J. and Oldfield, F. and Patrick, S.T. and Richardson, N.G. and Rippey, B. and Stevenson, A.C.}
}
@article {744,
	title = {Understanding the Pollution Sensitivity of Lichens},
	journal = {Botanical Journal of the Linnean Society},
	volume = {96},
	year = {1988},
	pages = {31-43},
	author = {Richardson, D.H.S.}
}
@article {1915,
	title = {Daphnia magna as a model to assess heavy metal toxicity: comparative assessment with the mouse system},
	journal = {Acta Hydrochim Hydrobiol},
	year = {1987},
	pages = {427-432},
	author = {Khangarot, B. S and Ray, P. K}
}
@article {53,
	title = {Effects of airborne fluoride emissions in Wales, Part 1},
	journal = {Environmental Pollution},
	volume = {47},
	year = {1987},
	pages = {63-78},
	author = {Perkins, D.F. and Millar R.O.}
}
@article {1981,
	title = {Sensitivity of toad tadpoles, Bufo melanostictus (Schneider), to heavy metals},
	journal = {Bulletin of Environmental Contamination and Toxicology},
	year = {1987},
	pages = {523-527},
	author = {Khangarot, B. S and Ray, P. K}
}
@article {752,
	title = {Biological effects of acidification on tertiary consumers: fish population responses},
	journal = {Water, Air and Soil Pollution},
	volume = {30},
	year = {1986},
	pages = {451-460},
	author = {Rosseland, B.O.}
}
@article {729,
	title = {The history of the countryside},
	year = {1986},
	address = {Dent},
	author = {Rackham, O.}
}
@article {1316,
	title = {Effect of soil processes on the acidification of water by acid deposition},
	journal = {Journal of Environmental Quality},
	volume = {14},
	year = {1985},
	pages = {26-31},
	author = {Reuss, J.P. and Johnson, D.W.}
}
@article {1339,
	title = {The effects of air-borne ammonium sulphate on Pinus nigra in the Netherlands},
	journal = {Plant Soil},
	volume = {42},
	year = {1985},
	pages = {372{\textendash}377},
	author = {Roelofs, J.G.M. and Kempers, A.J. and Houdijk, A.L.F.M. and Jansen, J.}
}
@article {740,
	title = {Effects of O3, SO2, and acidic rain on mycorrhizal infection in northern red oak seedlings},
	journal = {Canadian Journal of Botany },
	volume = {63},
	year = {1985},
	pages = {2049-2055},
	author = {Reich, P.B. and Schoettle, A.W. and Stroo, H.F. and Trojano, J. and Amundsen, R.G.}
}
@article {764,
	title = {The effects of ozone and acid mist on Scots pine seedlings. },
	journal = {Oecologia},
	volume = {65},
	year = {1985},
	pages = {201},
	author = {Skeffington, R.A. and Roberts, T.M.}
}
@article {1634,
	title = {Effects of sulphur dioxide fumigation on soil system and growth behaviour of Vicia faba plants.},
	journal = {Plant and Soil},
	volume = {86},
	year = {1985},
	pages = {69-78},
	author = {Agrawal, M. and Nandi, P.K. and Rao, D.N.}
}
@article {747,
	title = {Key to the Common Plant Communities of Scotland},
	journal = {Soil Survey of Scotland Monograph. },
	year = {1984},
	publisher = {The Macaulay Institute for Soil Research},
	address = {Aberdeen},
	author = {Robertson, J.S.}
}
@article {746,
	title = {The variation of calcium, magnesium, sodium and potassium concentration, pH and conductivity in lakes in Northern Ireland. },
	journal = {Archiv fur Hydrobiologie },
	volume = {101},
	year = {1984},
	pages = {345-360},
	author = {Rippey, B. and Gibson, C.E.}
}
@article {751,
	title = {Effect of ozone on gross photosynthesis of lichens},
	journal = {Environmental and Experimental Botany },
	volume = {23},
	year = {1983},
	pages = {71-77},
	author = {Ross, L.J. and Nash, T.H.}
}
@article {293,
	title = {Impact of acidification and eutrophication on macrophyte communities in soft waters in the Netherlands},
	journal = {Aquatic Botany},
	volume = {17},
	year = {1983},
	pages = {139-155},
	author = {Roelofs, J.G.M.}
}
@article {1882,
	title = {Cadmium toxicity and accumulation in eggs and alevins of Atlantic salmon Salmo salar},
	journal = {Canadian Journal of Zoology},
	year = {1982},
	pages = {2006-2014},
	author = {Rombough, P. J and Garside, E. T}
}
@article {1641,
	title = {Relative performance of conifer populations in various tests for sensitivity to SO2 and the implications for selecting trees for planting in polluted areas.},
	journal = {New Phytologist},
	volume = {92},
	year = {1982},
	pages = {349-367},
	author = {Garsed, S.G. and Rutter, A.J.}
}
@article {1607,
	title = {Lichen recolonization in London{\textquoteright}s cleaner air.},
	journal = {Nature},
	volume = {289},
	year = {1981},
	pages = {289-292},
	author = {Rose, C.I. and Hawksworth, D.L.}
}
@article {576,
	title = {Eutrophication parameters and trophic state indices in 30 Swedish lakes. },
	journal = {Archiv fur Hydrobiologie },
	volume = {89},
	year = {1980},
	pages = {189-207},
	author = {Forsberg, C. and Ryding, S.-E.}
}
@article {117,
	title = {Shell thinning and residues of organochlorine and mercury in seabird eggs, Eastern Canada 1970-1976},
	journal = {Pesticide Monitoring Journal },
	volume = {13},
	year = {1979},
	pages = {61-68},
	author = {Pearse, P.A. and Peakall, D.B. and Reynolds, L.M.}
}
@article {1645,
	title = {Studies on the effects of low levels of sulphur dioxide on the growth of Lolium Perenne L.},
	journal = {New Phytologist},
	volume = {83},
	year = {1979},
	pages = {627-643},
	author = {Bell, J.N.B. and Rutter, A.J. and Relton, J.}
}
@article {2016,
	title = {Toxicity of soluble copper and other metal ions to Elodea canadensis},
	journal = {Environmental Pollution},
	year = {1979},
	pages = {303-314},
	author = {Brown, B. T and Rattigan, B. M}
}
@article {1978,
	title = {Toxicity of soluble copper and other metal ions to Elodea canadensis.},
	journal = {Environmental Pollution},
	year = {1979},
	pages = {303-314},
	author = {Brown, B. T and Rattigan, B. M}
}
@article {219,
	title = {Survey of ozone levels in British Isles using indicator plants},
	journal = {Nature},
	volume = {276(5690)},
	year = {1978},
	pages = {813-815},
	author = {Ashmore, M.R. and Bell, J.N.B. and Reily, C.L.}
}
@article {208,
	title = {A Nature Conservation Review},
	journal = {Cambridge University Press},
	volume = {Volume I},
	year = {1977},
	address = {Cambridge},
	author = {Ratcliffe, D.A.}
}
@article {570,
	title = {Sulphur dioxide and growth of Pinus sylvestris},
	journal = {Journal of Applied Ecology },
	volume = {14},
	year = {1977},
	pages = {861-875},
	author = {Farrar, J.F. and Relton, J. and Rutter, A.J.}
}
@article {2014,
	title = {The effect of copper, zinc, cobalt and manganese on the growth of the marine diatom Nitzschia closterium},
	journal = {Bulletin of the Torrey Botanical Club},
	year = {1975},
	pages = {100-106},
	author = {Rosko, J. J and Rachlin, J. W}
}
@inbook {750,
	title = {The British Oak},
	year = {1974},
	pages = {250-273},
	publisher = {Botanical Society of the British Isles.},
	organization = {Botanical Society of the British Isles.},
	chapter = {The Epiphytes of Oak},
	author = {Rose, F. and Morris, M.G. (Eds) and Perring, F.H. (Eds)}
}
@article {1984,
	title = {Toxicity of methylmercury and copper, apllied singly and jointly, to the blue gourami Trichogaster trichopterus},
	journal = {Bull Environ Contam Toxicol},
	year = {1974},
	author = {Roales, R. R and Perlmutter, A}
}
@article {1973,
	title = {The effect of increased temperature upon the acute toxicity of some heavy metal ions},
	journal = {Bulletin of Environmental Contamination and Toxicology},
	year = {1972},
	pages = {91-96},
	author = {Rehwoldt, R and Menapace, L. W and Nerrie, B and Alessandrello, D}
}
@article {233,
	title = {Plants and soils as indicators of metals in the air},
	journal = {Nature},
	volume = {231},
	year = {1971},
	pages = {287-292},
	author = {Goodman, G.T. and Roberts, T.M.R.}
}
@article {235,
	title = {Lichens as Pollution Monitors},
	year = {1970},
	institution = {Edward Arnold},
	address = {London},
	author = {Hawksworth, D.L. and Rose, F.}
}
@article {607,
	title = {Qualitave scale for estimating sulphur dioxoide in air pollution in England and Wales using epiphytic lichens},
	journal = {Nature},
	volume = {227},
	year = {1970},
	pages = {145-148},
	author = {Hawksworth, D.L. and Rose, F.}
}
@article {735,
	title = {The dune system and dune slack habitat},
	journal = {Journal of Ecology },
	volume = {447},
	year = {1959},
	pages = {571-600},
	address = {Newborough Warren, Anglesey},
	author = {Ranwell, D.}
}
