Abstract
Providing an accurate estimate of the dry component of N deposition to low N background, semi-natural habitats, such as bogs and upland moors dominated by Calluna vulgaris is difficult, but essential to relate nitrogen deposition to effects in these communities. To quantify the effects of NH3 inputs to moorland vegetation growing on a bog at a field scale, a field release NH3 fumigation system was established at Whim Moss (Scottish Borders) in 2002. Gaseous NH3 from a line source was released along of a 60 m transect, when meteorological conditions (wind speed >2.5 m s−1 and wind direction in the sector 180–215°) were met, thereby providing a profile of decreasing NH3 concentration with distance from the source. In a complementary study, using a NH3 flux chamber system, the relationships between NH3 concentrations and cuticular resistances were quantified for a range of NH3 concentrations and micrometeorological conditions for moorland vegetation. Cuticular resistances increased with NH3 concentration from 11 s m−1 at 3.0 μg m−3 to 30 s m−1 at 30 μg m−3. The NH3 concentration data and the concentration-dependent canopy resistance are used to calculate NH3 deposition taking into account leaf surface wetness. The implications of using an NH3 concentration-dependent cuticular resistance and the importance for refining critical loads are discussed.
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Achermann, B. and Bobbink, R. (eds): 2003, Empirical Critical Loads for Nitrogen, Expert Workshop Berne, 11–13 November 2002. Environ. Doc. No. 164, Swiss Agency for the Environment, Forests and Landscape SAEFL, Berne, pp. 231–257.
Carfrae, J. A., Sheppard, L. J., Raven, J. A., Leith, I. D., Stein, W., Crossley, A. and Theobald, M.: 2004, ‘Early effects of atmospheric ammonia deposition on Calluna vulgaris (L.) Hull growing on an ombrotrophic peat bog’, Water, Air Soil Pollut: Focus 4, 229–239.
Dueck, T. A., Van der Eerden, L. J., Beemsterboer, B. and Elderson, J.: 1991, ‘Nitrogen uptake and allocation by Calluna vulgaris (L.) Hull and Deschampsia flexuosa (L.) Trin. exposed to 15NH3, Acta Bot. Neerl’, 40(4), 257–267.
Flechard, C. R. and Fowler, D.: 1998, ‘Atmospheric ammonia at a moorland site. I: The meteorological control of ambient ammonia concentrations and the influence of local sources’, Quart. J. Royal Meteorol. Soc., 124, 733–757.
Flechard, C. R., Fowler, D., Sutton, M. A. and Cape, J.N.: 1999, ‘A dynamic chemical model of bi-directional ammonia exchange between semi-natural vegetation and the atmosphere’, Quart. J. Royal Meteorol. Soc., 125, 2611–2641.
Fowler, D., Pitcairn, C. E. R., Sutton, M. A., Flechard, C., Loubert, B., Coyle, M. and Munro, R. C.: 1998, ‘The mass budget of atmospheric ammonia in woodland within 1 km of livestock buildings’, Environ. Pollut. 102, S1, 343–348.
Fangmeier, A., Hadwiger-Fangmeier, A., Van der Eerden, L. and Jäger, H.-J.: 1994, ‘Effects of atmospheric ammonia on vegetation-a review’, Environ. Pollut. 86, 43–82.
Loubet, B.: 2000, ‘Modélisation du dépt sec d’ammoniac atmosphérique proximité des sources’, PhD thesis, Université Paul Sabatier, Toulouse, France.
NEGTAP: 2001, Transboundary Air Pollution: Acidification, Eutrophication and Ground-level Ozone in the UK, Prepared on behalf of the UK Department of Environment, Food and Rural Affairs by the National Expert Group on Transboundary Air Pollution, DEFRA, London.
Pitcairn, C. E. R., Leith, I. D., Sheppard, L. J., Sutton, M. A., Fowler, D., Munro, R. C., Tang, S. and Wilson, D.: 1998, ‘The relationship between nitrogen deposition, species composition and foliar nitrogen concentrations in woodland flora in the vicinity of livestock farms’, Environ. Pollut. 102, 41–48.
Sheppard, L. J., Crossley, A., Leith, I. D., Hargreaves, K. J., Carfrae, J. A., van Dijk, N., Cape, J. N., Sleep, D., Fowler, D. and Raven, J. A.: 2004, ‘An automated wet deposition system to compare the effects of reduced and oxidised N on ombrotrophic bog species: Practical considerations’, Water Air Soil Pollut: Focus, 4, 197–205.
Sutton, M. A.: 1990, ‘The surface/atmosphere exchange of ammonia’, PhD Thesis, Edinburgh.
Sutton M. A., Pitcairn, C. E. R. and Fowler, D.: 1993, ‘The exchange of ammonia between the atmosphere and plant communities’, Adv. Ecol. Res. 24, 301–393.
Sutton, M. A., Tang, Y. S., Dragosits, U., Fournier, N., Dore, A. J., Smith, R. I., Weston, K. J. and Fowler, D.: 2001, ‘A spatial analysis of atmospheric ammonia and ammonium in the UK’, TheScientificWorld. 1(S2), 275–286.
Sutton, M. A., Cape, J. N., Rihm, B., Sheppard, L. J., Smith, R. I., Spranger, T.: 2003, ‘The importance of Accurate Background Atmospheric Deposition Estimates in Setting Critical Loads for Nitrogen’. In B. Achermann and R. Bobbink (eds.). Empirical Critical Loads for Nitrogen, Expert Workshop, Berne, 11–13 November 2002, Environ. Doc. No. 164, Swiss Agency for the Environment, Forests and Landscape SAEFL, Berne, pp. 231–257.
Tang, Y. S., Cape, J. N. and Sutton, M. A.: 2001, ‘Development and types of passive samplers for monitoring atmospheric NO2 and NH3 concentrations’, TheScientificWorld 1, 513–529.
Theobald, M. R., Milford, C., Hargreaves, K. J., Sheppard, L. J., Nemitz, E., Tang, Y. S., Phillips, V. R., Sneath, R., McCartney, L., Harvey, F. J., Leith, I. D., Cape, J. N., Fowler, D. and Sutton, M. A: 2001, ‘Potential for ammonia recapture by farm woodlands: Design and application of a new experimental facility’, TheScientificWorld. 1(S2): 791–801.
Van der Eerden, L. J., Dueck, T. A., Berdowski, H., Greven, H. and van Dobben, H. F.: 1991. ‘Influence of NH3 and (NH4)2SO4 on heathland vegetation’, Acta Bot. Neerl. 40(4), 281–296.
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Leith, I.D., Sheppard, L.J., Fowler, D. et al. Quantifying Dry NH3 Deposition to an Ombrotrophic Bog from an Automated NH3 Field Release System. Water Air Soil Pollut: Focus 4, 207–218 (2004). https://doi.org/10.1007/s11267-004-3031-3
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DOI: https://doi.org/10.1007/s11267-004-3031-3