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  • Aber, J.D., Goodale, C.L., Ollinger, S.V., Smith, M., Magill, A.H., Martin, M.E., Hallett, R.A. & Stoddard, J.L. (2003) Is nitrogen deposition altering the nitrogen status of northeastern forests? Bioscience, 53, 375389.
  • Aber, J.D., Nadelhoffer, K.J., Steudler, P. & Melillo, J.M. (1989) Nitrogen saturation in northern forest ecosystems. Bioscience, 39, 378386.
  • Aerts, R. (1999) Interspecific competition in natural plant communities: mechanisms, trade-offs and plant–soil feedbacks. Journal of Experimental Botany, 50, 2937.
  • Ågren, G.I. & Bosatta, E. (1988) Nitrogen saturation of terrestrial ecosystems. Environmental Pollution, 54, 185197.
  • Anderson, W.B. (2003) Interactions of nutrient effects with other biotic factors in the herbaceous layer. The Herbaceous Layer in Forests of Eastern North America (eds F.S.Gilliam & M.R.Roberts), pp. 91101. Oxford University Press, New York.
  • Asman, W.A.H., Sutton, M.A. & Schrjørring, J.K. (1998) Ammonia: emission, atmospheric transport and deposition. New Phytologist, 139, 2748.
  • Aubert, M., Bureau, F. & Vinceslas-Akpa, M. (2005) Sources of spatial and temporal variability of inorganic nitrogen in pure and mixed deciduous temperate forests. Soil Biology and Biochemistry, 37, 6779.
  • Barber, S.A. (1995) Soil Nutrient Bioavailability: a Mechanistic Approach, 2nd edn. John Wiley & Sons, New York.
  • Beatty, S.W. (2003) Habitat heterogeneity and maintenance of species in understory communities. The Herbaceous Layer in Forests of Eastern North America (eds F.S.Gilliam & M.R.Roberts), pp. 177197. Oxford University Press, New York.
  • Bobbink, R., Hornung, M. & Roelofs, J.G.M. (1998) The effects of air-borne nitrogen pollutants on species diversity in natural and semi-natural European vegetation. Journal of Ecology, 86, 717738.
  • Bohlen, P.J., Scheu, S., Hale, C.M., McLean, M.A., Migge, S., Groffman, P.M. & Parkinson, D. (2004) Non-native invasive earthworms as agents of change in northern temperate forests. Frontiers in Ecology and the Environment, 2, 427435.
  • Boxman, A.W., Blanck, K., Brandrud, T.-K., Emmett, B.A., Gundersen, P., Hogervorst, R.F., Kjønaas, O.J., Persson, H. & Timmermann, V. (1998) Vegetation and soil biota response to experimentally-changed nitrogen inputs in coniferous forest ecosystems of the NITREX project. Forest Ecology and Management, 101, 6579.
  • Brandrud, T.K. & Timmermann, V. (1998) Ectomycorrhizal fungi in the NITREX site at Grdsjn, Sweden; below and above-ground responses to experimentally-changed nitrogen inputs 1990–1995. Forest Ecology and Management, 101, 207214.
  • Brooks, M.L. (2003) Effects of increased soil nitrogen on the dominance of alien annual plants in the Mojave Desert. Journal of Applied Ecology, 40, 344353.
  • Brown, M.J. & Parker, G.G. (1994) Canopy light transmittance in a chronosequence of mixed-species deciduous forests. Canadian Journal of Forest Research, 24, 16941703.
  • Brunet, J., Diekmann, M. & Falkengren-Grerup, U. (1998) Effects of nitrogen deposition on field layer vegetation in south Swedish forests. Environmental Pollution, 102, 3540.
  • Cassidy, T.M., Fownes, J.H. & Harrington, R.A. (2004) Nitrogen limits an invasive perennial shrub in forest understory. Biological Invasions, 6, 113121.
  • Coomes, D.A. & Grubb, P.J. (2000) Impacts of root competition in forests and woodlands: a theoretical framework and review of experiments. Ecological Monographs, 70, 171207.
  • Denno, R.F. & Fagan, W.F. (2003) Might nitrogen limitation promote omnivory among carnivorous arthropods? Ecology, 84, 25222531.
  • Dighton, J., Tuininga, A.R., Gray, D.M., Huskins, R.E. & Belton, T. (2004) Impacts of atmospheric deposition on New Jersey pine barrens forest soils and communities of ectomycorrhizae. Forest Ecology and Management, 201, 131144.
  • Eaton, G.K. & Ayres, M.P. (2002) Plasticity and constraint in growth and protein mineralization of ectomycorrhizal fungi under simulated nitrogen deposition. Mycologia, 94, 921932.
  • Ehrenfeld, J.G. (2003) Effects of exotic plant invasions on soil nutrient cycling processes. Ecosystems, 6, 503523.
  • Ehrenfeld, J.G., Kourtev, P. & Huang, W. (2001) Changes in soil functions following invasions of exotic understory plants in deciduous forests. Ecological Applications, 11, 12871300.
  • Erisman, J.W. & De Vries, W. (2000) Nitrogen deposition and effects on European forests. Environmental Review, 8, 6593.
  • Falkengren-Grerup, U. (1986) Soil acidification and vegetation changes in deciduous forest in southern Sweden. Oecologia, 70, 339347.
  • Falkengren-Grerup, U. (1989) Soil acidification and its impact on ground vegetation. Ambio, 18, 339347.
  • Fargione, J.E. & Tilman, D. (2005) Diversity decreases invasion via both sampling and complementarity effects. Ecology Letters, 8, 604611.
  • Fenn, M.E., Baron, J.S., Allen, E.B., Rueth, H.M., Nydick, K.R., Geiser, L., Bowman, W.D., Sickman, J.O., Meixner, T.S., Johnson, D.W. & Neitlich, P. (2003) Ecological effects of nitrogen deposition in the western United States. Bioscience, 53, 404420.
  • Fenn, M.E., Poth, M.A., Aber, J.D., Baron, J.S., Bormann, B.T., Johnson, D.W., Lemly, A.D., McNulty, S.G., Ryan, D.F. & Stottlemeyer, R. (1998) Nitrogen excess in North American ecosystems: predisposing factors, ecosystem responses, and management strategies. Ecological Applications, 8, 706733.
  • Galloway, J.N., Dentener, F.J., Capone, D.G., Boyer, E.W., Howarth, R.W., Seitzinger, S.P., Asner, G.P., Cleveland, C.C., Green, P.A., Holland, E.A., Karl, D.M., Michaels, A.F., Porter, J.H., Townsend, A.R. & Vörösmarty, C.J. (2004) Nitrogen cycles: past, present, and future. Biogeochemistry, 70, 153226.
  • George, L.O. & Bazzaz, F.A. (2003) The herbaceous layer as a filter determining spatial pattern in forest tree regeneration. The Herbaceous Layer in Forests of Eastern North America (eds F. S.Gilliam & M. R.Roberts), pp. 265282. Oxford University Press, New York.
  • Gilliam, F.S. & Adams, M.B. (1996) Wetfall deposition and precipitation chemistry for central Appalachian forest. Journal of the Air and Waste Management Association, 46, 978984.
  • Gilliam, F.S., Adams, M.B. & Yurish, B.M. (1996) Ecosystem nutrient responses to chronic nitrogen inputs at Fernow Experimental Forest, West Virginia. Canadian Journal of Forest Research, 26, 196205.
  • Gilliam, F.S., Hockenberry, A.W. & Adams, M.B. (2006) Effects of atmospheric nitrogen deposition on the herbaceous layer of a central Appalachian hardwood forest. Journal of the Torrey Botanical Society, 133, in press.
  • Gilliam, F.S., Lyttle, N.L., Thomas, A. & Adams, M.B. (2005) Soil variability along a nitrogen mineralization/nitrification gradient in a nitrogen-saturated hardwood forest. Soil Science Society of America Journal, 69, 247256.
  • Gilliam, F.S. & Roberts, M.R. (2003a) The Herbaceous Layer in Forests of Eastern North America. Oxford University Press, New York.
  • Gilliam, F.S. & Roberts, M.R. (2003b) Introduction: conceptual framework for studies of the herbaceous layer. The Herbaceous Layer in Forests of Eastern North America (eds F. S.Gilliam & M. R.Roberts), pp. 311. Oxford University Press, New York.
  • Gilliam, F.S. & Roberts, M.R. (2003c) The dynamic nature of the herbaceous layer: synthesis and future directions for research. The Herbaceous Layer in Forests of Eastern North America (eds F.S.Gilliam & M.R.Roberts), pp. 323337. Oxford University Press, New York.
  • Gilliam, F.S., Turrill, N.L., Aulick, S.D., Evans, D.K. & Adams, M.B. (1994) Herbaceous layer and soil response to experimental acidification in a central Appalachian hardwood forest. Journal of Environmental Quality, 23, 835844.
  • Gilliam, F.S., Yurish, B.M. & Adams, M.B. (2001) Temporal and spatial variation of nitrogen transformations in nitrogen-saturated soils of a Central Appalachian hardwood forest. Canadian Journal of Forest Research, 31, 17681785.
  • Grelet, G.-A., Meharg, A.A. & Alexander, I.J. (2005) Carbon availability affects nitrogen source utilisation by Hymenoscyphus ericae. Mycological Research, 109, 469477.
  • Gundale, M.J. (2002) Influence of exotic earthworms on the soil organic matter horizon and the rare fern Botrychium mormo. Conservation Biology, 16, 15551561.
  • Gundale, M.J., Jolly, W.M. & Deluca, T.H. (2005) Susceptibility of a northern hardwood forest to exotic earthworm invasion. Conservation Biology, 19, 10751083.
  • Hale, C.M., Frelich, L.E., Reich, P.B. & Pastor, J. (2005) Effects of European earthworm invasion on soil characteristics in northern hardwood forests of Minnesota, USA. Ecosystems, 8, 911927.
  • Hartley, S.E. & Mitchell, R.J. (2005) Manipulation of nutrients and grazing levels on heather moorland: changes in Calluna dominance and consequences for community composition. Journal of Ecology, 93, 9901004.
  • Hodge, A., Stewart, J., Robinson, D., Griffiths, B.S. & Fitter, A.H. (2000) Competition between roots and soil micro-organisms for nutrients from nitrogen-rich patches of varying complexity. Journal of Ecology, 88, 150164.
  • Holland, E.A. & Lamarque, J.-F. (1997) Modeling bio-atmospheric coupling of the nitrogen cycle through NOx emissions and NOy deposition. Nutrient Cycling in Agroecosystems, 48, 724.
  • Hurd, T.M., Brach, A.R. & Raynal, D.J. (1998) Response of understory vegetation of Adirondack forests to nitrogen additions. Canadian Journal of Forest Research, 28, 799807.
  • Hutchings, M.J., John, E.A. & Wijesinghe, D.K. (2003) Toward understanding the consequences of soil heterogeneity for plant populations and communities. Ecology, 84, 23222334.
  • James, S.W. & Cunningham, M.R. (1989) Feeding ecology of some earthworms in Kansas tallgrass prairie. American Midland Naturalist, 121, 7883.
  • John, E. & Turkington, R. (1995) Herbaceous vegetation in the understorey of the boreal forest: does nutrient supply or snowshoe hare herbivory regulate species composition and abundance? Journal of Ecology, 83, 581590.
  • Knapp, A.K., Blair, J.M., Briggs, J.M., Collins, S.L., Hartnett, D.C., Johnson, L.C. & Towne, E.G. (1999) The keystone role of bison in North American tallgrass prairie. Bioscience, 49, 3950.
  • Knorr, M., Frey, S.D. & Curtis, P.S. (2005) Nitrogen additions and litter decomposition: a meta-analysis. Ecology, 86, 32523257.
  • Kobe, R.K., Pacala, S.W., Silander, J.A. Jr & Canham, C.D. (1995) Juvenile tree survivorship as a component of shade tolerance. Ecological Applications, 5, 517532.
  • Kourtev, P.S., Huang, W.Z. & Ehrenfeld, J.G. (1999) Differences in earthworm densities and nitrogen dynamics in soils under exotic and native plant species. Biological Invasions, 1, 237245.
  • Krupa, S.V. (2003) Effects of atmospheric ammonia (NH3) on terrestrial vegetation: a review. Environmental Pollution, 124, 179221.
  • Langner, J., Persson, C. & Robertson, L. (1995) Concentration and deposition of acidifying air pollutants over Sweden: estimates for 1991 based on the MATCH model and observations. Water, Air, and Soil Pollution, 85, 20212026.
  • Laverman, A.M., Borgers, P. & Verhoef, H.A. (2002) Spatial variation in net nitrate production in a N-saturated coniferous forest soil. Forest Ecology and Management, 161, 123132.
  • Lawrence, B., Fisk, M.C., Fahey, T.J. & Suárez, E.R. (2003) Influence of non-native earthworms on mycorrhizal colonization of sugar maple (Acer saccharum). New Phytologist, 157, 145153.
  • Lilleskov, E.A. & Bruns, T.D. (2001) Nitrogen and ectomycorrhizal fungal communities: what we know, what we need to know. New Phytologist, 149, 154158.
  • Lilleskov, E.A., Fahey, T.J., Horton, T.R. & Lovett, G.M. (2002) Belowground ectomycorrhizal fungal community change over a nitrogen deposition gradient in Alaska. Ecology, 83, 104115.
  • Luken, J.O. (2003) Invasions of forests in the eastern United States. The Herbaceous Layer in Forests of Eastern North America (eds F.S.Gilliam & M.R.Roberts), pp. 283301. Oxford University Press, New York.
  • Marschner, H. (1995) Mineral Nutrition of Higher Plants, 2nd edn. Academic Press, London.
  • May, J.D. & Killingbeck, K.T. (1992) Effects of preventing nutrient resorption on plant fitness and foliar nutrient dynamics. Ecology, 73, 18681878.
  • McCarthy, B.C. (2003) The herbaceous layer of eastern old-growth deciduous forests. The Herbaceous Layer in Forests of Eastern North America (eds F.S.Gilliam & M.R.Roberts), pp. 163176. Oxford University Press, New York.
  • Mitchell, C.E., Reich, P.B., Tilman, D. & Groth, J.V. (2003) Effects of elevated CO2, nitrogen deposition, and decreased species diversity on foliar fungal plant disease. Global Change Biology, 9, 438451.
  • Muller, R.N. (2003) Nutrient relations of the herbaceous layer in deciduous forest ecosystems. The Herbaceous Layer in Forests of Eastern North America (eds F.S.Gilliam & M.R.Roberts), pp. 1537. Oxford University Press, New York.
  • Muller, E.K.H. & Janiesch, P. (1993) In vivo nitrate reductase activity in Carex pseudocyperus L. the influence of nitrite-ammonium concentration ratios and correlation with growth. Journal of Plant Nutrition, 16, 13571372.
  • Nadelhoffer, K.J., Downs, M.R. & Fry, B. (1999) Sinks for 15N-enriched additions to an oak forest and a red pine plantation. Ecological Applications, 9, 7286.
  • Neufeld, H.S. & Young, D.R. (2003) Ecophysiology of the herbaceous layer in temperate deciduous forests. The Herbaceous Layer in Forests of Eastern North America (eds F. S.Gilliam & M. R.Roberts), pp. 3890. Oxford University Press, New York.
  • Niemelä, P., Tahvanainen, J., Sorjonen, J., Hokkanen, T. & Neuvonen, S. (1982) The influence of host plant growth form and phenology on the life strategies of Finnish macrolepidopterous larvae. Oikos, 39, 164170.
  • Nordin, A., Näsholm, T. & Ericson, L. (1998) Effects of simulated N deposition on understory vegetation of a boreal coniferous forest. Functional Ecology, 12, 691699.
  • Nordin, A., Strengbom, J. & Ericson, L. (2006) Responses to ammonium and nitrate additions by boreal plants and their natural enemies. Environmental Pollution, 141, 167174.
  • Nordin, A., Strengbom, J., Witzell, J., Näsholm, T. & Ericson, L. (2005) Nitrogen deposition and the biodiversity of boreal forests: implications for the nitrogen critical load. Ambio, 34, 2024.
  • Økland, T., Bakkestuen, V., Økland, R.H. & Eilersten, O. (2004) Changes in forest understorey vegetation in Norway related to long-term soil acidification and climatic change. Journal of Vegetation Science, 15, 437448.
  • Ollinger, S.V., Aber, J.D., Lovett, G.M., Millham, S.E., Lathrop, R.G. & Ellis, J.M. (1993) A spatial model of atmospheric deposition for the northeastern U.S. Ecological Applications, 7, 459472.
  • Padgett, P.E. & Allen, E.B. (1999) Differential responses to nitrogen fertilization in native shrubs and exotic annuals common to Mediterranean coastal sage scrub of California. Plant Ecology, 144, 93101.
  • Parton, W.J., Stewart, J.W.B. & Cole, C.V. (1988) Dynamics of C, N, P and S in grassland soils: a model. Biogeochemistry, 5, 109131.
  • Pennings, S.C., Clark, C.M., Cleland, E.E., Collins, S.L., Gough, L., Gross, K.L., Milchunas, D.G. & Suding, K.N. (2005) Do individual plant species show predictable responses to nitrogen addition across multiple experiments? Oikos, 110, 547555.
  • Perotto, S., Girlanda, M. & Martino, E. (2002) Ericoid mycorrhizal fungi: some new perspectives on old acquaintances. Plant and Soil, 244, 4153.
  • Peterjohn, W.T., Adams, M.B. & Gilliam, F.S. (1996) Symptoms of nitrogen saturation in two central Appalachian hardwood forests. Biogeochemistry, 35, 507522.
  • Postgate, J.R. (1982) The Fundamentals of Nitrogen Fixation. Cambridge University Press, Cambridge.
  • Price, J.N. & Morgan, J.W. (2006) Vegetation dynamics following resource manipulations in herb-rich woodland. Plant Ecology, in press.
  • Rainey, S.M., Nadelhoffer, K.J., Silver, W.L. & Downs, M.R. (1999) Effects of chronic nitrogen additions on understory species in a red pine plantation. Ecological Applications, 9, 949957.
  • Read, D.J. (1996) The structure and function of the ericoid mycorrhizal root. Annals of Botany, 77, 365374.
  • Read, D.J. & Perez-Moreno, J. (2003) Mycorrhizas and nutrient cycling in ecosystems – a journey towards relevance? New Phytologist, 157, 475492.
  • Richardson, H.L. (1938) The nitrogen cycle in grassland soils: with especial reference to the Rothamsted Park Grass Experiment. Journal of Agricultural Science, 28, 73121.
  • Roberts, M.R. (2004) Response of the herbaceous layer to natural disturbance in North American forests. Canadian Journal of Botany, 82, 12731283.
  • Roberts, M.R. & Gilliam, F.S. (1995) Patterns and mechanisms of diversity in forested ecosystems: implications for forest management. Ecological Applications, 5, 969977.
  • Roberts, M.R. & Gilliam, F.S. (2003) Response of the herbaceous layer to disturbance in eastern forests. The Herbaceous Layer in Forests of Eastern North America (eds F.S.Gilliam & M.R.Roberts), pp. 302320. Oxford University Press, New York.
  • Schleppi, P., Muller, N., Edwards, P.J. & Bucher, J.B. (1999) Three years of increased nitrogen deposition do not affect the vegetation of a montane forest ecosystem. Phyton, 39, 197204.
  • Small, C.J. & McCarthy, B.C. (2003) Spatial and temporal variability of herbaceous vegetation in an eastern deciduous forest. Plant Ecology, 164, 3748.
  • Smith, S.E. & Read, D.J. (1997) Mycorrhizal Symbiosis, 2nd edn. Academic Press, San Diego.
  • Stevens, M.H.H. & Carson, W.P. (2002) Resource quantity, not resource heterogeneity, maintains plant diversity. Ecology Letters, 5, 420426.
  • Stevens, G.N. & Jones, R.H. (2006) Patterns in soil fertility and root herbivory interact to influence fine-root dynamics. Ecology, 87, 616624.
  • Stoddard, J.L. (1994) Long-term changes in watershed retention of nitrogen: its causes and aquatic consequences. Environmental Chemistry of Lakes and Reservoirs (ed. L.A.Baker), pp. 223282. ACS Advances in Chemistry Series no. 237, American Chemical Society, Washington, DC.
  • Strengbom, J., Englund, G. & Ericson, L. (2006) Experimental scale and precipitation modify effects of nitrogen addition on a plant pathogen. Journal of Ecology, 94, 227233.
  • Strengbom, J., Nordin, A., Näsholm, T. & Ericson, L. (2001) Slow recovery of boreal forest ecosystem following decreased nitrogen input. Functional Ecology, 15, 451457.
  • Strengbom, J., Nordin, A., Näsholm, T. & Ericson, L. (2002) Parasitic fungus mediates change in nitrogen-exposed boreal forest vegetation. Journal of Ecology, 90, 6167.
  • Strengbom, J., Walheim, M., Näsholm, T. & Ericson, L. (2003) Regional differences in occurrences of understorey forest species reflect differences in N deposition. Ambio, 32, 9197.
  • Suding, K.N., Collins, S.L., Gough, L., Clark, C., Cleland, E.E., Gross, K.L., Milchunas, D.G. & Pennings, S. (2005) Functional- and abundance-based mechanisms explain diversity loss due to N fertilization. Proceedings of the National Academy of Sciences USA, 102, 43874392.
  • Taylor, G.E. Jr, Johnson, D.W. & Andersen, C.P. (1994) Air pollution and forest ecosystems: a regional to global perspective. Ecological Applications, 4, 662689.
  • Throop, H.L., Holland, E.A., Parton, W.J., Ojima, D.S. & Keough, C.A. (2004) Effects of nitrogen deposition and insect herbivory on patterns of ecosystem-level carbon and nitrogen dynamics: results from the CENTURY model. Global Change Biology, 10, 10921105.
  • Throop, H.L. & Lerdau, M.T. (2004) Effects of nitrogen deposition on insect herbivory: implications for community and ecosystem processes. Ecosystems, 7, 109133.
  • Tilman, D. (1987) Secondary succession and the patterns of plant dominance along experimental nitrogen gradients. Ecological Monographs, 57, 189214.
  • Van Tol, G., Van Dobben, H.F., Schmidt, P. & Klap, J.M. (1998) Biodiversity of Dutch forest ecosystems as affected by receding groundwater levels and atmospheric deposition. Biodiversity and Conservation, 7, 221228.
  • Turkington, R., John, E., Watson, S. & Seccombe-Hett, P. (2002) The effects of fertilization and herbivory on the herbaceous vegetation of the boreal forest in north-western Canada: a 10-year study. Journal of Ecology, 90, 325337.
  • United States Environmental Protection Agency (2002) Nitrogen: multiple and regional impacts. Clean Air Markets Programs, EPA-430-R-01-006. USEPA Clean Air Markets Division, Washington, DC.
  • Vitousek, P.M. & Howarth, R.W. (1991) Nitrogen limitation on land and in the sea: how can it occur? Biogeochemistry, 13, 87115.
  • Wallenda, T. & Kottke, I. (1998) Nitrogen deposition and ectomycorrhizas. New Phytologist, 149, 154158.
  • Wedin, D. & Tilman, D. (1993) Competition among grasses along a nitrogen gradient: initial conditions and mechanisms of competition. Ecological Monographs, 63, 199229.
  • Whigham, D.F. (2004) Ecology of woodland herbs in temperate deciduous forests. Annual Review of Ecology and Systematics, 35, 583621.
  • Williard, K.W.J., DeWalle, D.R. & Edwards, P.J. (2005) Influence of bedrock geology and tree species composition on stream nitrate concentrations in mid-Appalachian forested watersheds. Water, Air, and Soil Pollution, 160, 5576.
  • Windham, L. (2002) Does atmospheric nitrate deposition promote understory plant invasions? Nitrate reductase assays say yes. Bulletin of the Ecological Society of America.
  • Wise, M.J. & Abrahamson, W.G. (2005) Beyond the compensatory continuum: environmental resource levels and plant tolerance of herbivory. Oikos, 109, 417428.
  • Wright, R.F. & VanBreemen, N. (1995) The NITREX project – an introduction. Forest Ecology and Management, 71, 15.
  • Yesmin, L., Gammack, S.M. & Cresser, M.S. (1996) Effects of atmospheric nitrogen deposition on ericoid mycorrhizal infection of Calluna vulgaris growing in peat soils. Applied Soil Ecology, 4, 4960.