caa a22 4500 467885524 CHVBK 20180406152733.0 cr unu---uuuuu 170328e20060401xx s 000 0 eng 10.1007/s10021-006-0051-z doi (NATIONALLICENCE)springer-10.1007/s10021-006-0051-z Evidence that Soil Carbon Pool Determines Susceptibility of Semi-Natural Ecosystems to Elevated Nitrogen Leaching [Elektronische Daten] [Christopher Evans, Brian Reynolds, Alan Jenkins, Rachel Helliwell, Christopher Curtis, Christine Goodale, Robert Ferrier, Bridget Emmett, Michael Pilkington, Simon Caporn, Jacky Carroll, David Norris, Jennifer Davies, Malcolm Coull] Deposition of reactive nitrogen (N) compounds has the potential to cause severe damage to sensitive soils and waters, but the process of ‘nitrogen saturation' is difficult to demonstrate or predict. This study compares outputs from a simple carbon-nitrogen model with observations of (1) regional- and catchment-scale relationships between surface water nitrate and dissolved organic carbon (DOC), as an indicator of catchment carbon (C) pool; (2) inter-regional variations in soil C/N ratios; and (3) plot scale soil and leachate response to long-term N additions, for a range of UK moorlands. Results suggest that the simple model applied can effectively reproduce observed patterns, and that organic soil C stores provide a critical control on catchment susceptibility to enhanced N leaching, leading to high spatial variability in the extent and severity of current damage within regions of relatively uniform deposition. Results also support the hypothesis that the N richness of organic soils, expressed as C/N ratio, provides an effective indicator of soil susceptibility to enhanced N leaching. The extent to which current C/N is influenced by N deposition, as opposed to factors such as climate and vegetation type, cannot be unequivocally determined on the basis of spatial data. However, N addition experiments at moorland sites have shown a reduction in organic soil C/N. A full understanding of the mechanisms of N-enrichment of soils and waters is essential to the assessment of current sensitivity to, and prediction of future damage from, globally increasing reactive nitrogen deposition. Springer Science+Business Media, Inc., 2006 carbon nationallicence nitrogen nationallicence nitrate leaching nationallicence soil organic matter nationallicence moorland catchments nationallicence MAGIC model nationallicence Evans Christopher Centre for Ecology and Hydrology, Deiniol Road, LL57 2UP, Bangor, UK aut Reynolds Brian Centre for Ecology and Hydrology, Deiniol Road, LL57 2UP, Bangor, UK aut Jenkins Alan Centre for Ecology and Hydrology, Crowmarsh Gifford, OX10 8BB, Wallingford, UK aut Helliwell Rachel Macaulay Institute, Craigiebuckler, AB15 8QH, Aberdeen, UK aut Curtis Christopher Environmental Change Research Centre, University College London, 26 Bedford Way, WC1H 0AP, London, UK aut Goodale Christine Department of Ecology and Evolutionary Biology, Cornell University, E215 Corson Hall, 14853, Ithaca, New York, USA aut Ferrier Robert Macaulay Institute, Craigiebuckler, AB15 8QH, Aberdeen, UK aut Emmett Bridget Centre for Ecology and Hydrology, Deiniol Road, LL57 2UP, Bangor, UK aut Pilkington Michael Department of Environmental and Leisure Studies, Manchester Metropolitan University, CW1 5DU, Crewe, UK aut Caporn Simon Department of Environmental and Leisure Studies, Manchester Metropolitan University, CW1 5DU, Crewe, UK aut Carroll Jacky Department of Environmental and Leisure Studies, Manchester Metropolitan University, CW1 5DU, Crewe, UK aut Norris David Centre for Ecology and Hydrology, Deiniol Road, LL57 2UP, Bangor, UK aut Davies Jennifer Centre for Ecology and Hydrology, Crowmarsh Gifford, OX10 8BB, Wallingford, UK aut Coull Malcolm Macaulay Institute, Craigiebuckler, AB15 8QH, Aberdeen, UK aut Ecosystems Springer-Verlag; www.springer-ny.com 9/3(2006-04-01), 453-462 1432-9840 9:3<453 2006 9 10021 https://doi.org/10.1007/s10021-006-0051-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10021-006-0051-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Evans Christopher Centre for Ecology and Hydrology, Deiniol Road, LL57 2UP, Bangor, UK aut NATIONALLICENCE 700 1- Reynolds Brian Centre for Ecology and Hydrology, Deiniol Road, LL57 2UP, Bangor, UK aut NATIONALLICENCE 700 1- Jenkins Alan Centre for Ecology and Hydrology, Crowmarsh Gifford, OX10 8BB, Wallingford, UK aut NATIONALLICENCE 700 1- Helliwell Rachel Macaulay Institute, Craigiebuckler, AB15 8QH, Aberdeen, UK aut NATIONALLICENCE 700 1- Curtis Christopher Environmental Change Research Centre, University College London, 26 Bedford Way, WC1H 0AP, London, UK aut NATIONALLICENCE 700 1- Goodale Christine Department of Ecology and Evolutionary Biology, Cornell University, E215 Corson Hall, 14853, Ithaca, New York, USA aut NATIONALLICENCE 700 1- Ferrier Robert Macaulay Institute, Craigiebuckler, AB15 8QH, Aberdeen, UK aut NATIONALLICENCE 700 1- Emmett Bridget Centre for Ecology and Hydrology, Deiniol Road, LL57 2UP, Bangor, UK aut NATIONALLICENCE 700 1- Pilkington Michael Department of Environmental and Leisure Studies, Manchester Metropolitan University, CW1 5DU, Crewe, UK aut NATIONALLICENCE 700 1- Caporn Simon Department of Environmental and Leisure Studies, Manchester Metropolitan University, CW1 5DU, Crewe, UK aut NATIONALLICENCE 700 1- Carroll Jacky Department of Environmental and Leisure Studies, Manchester Metropolitan University, CW1 5DU, Crewe, UK aut NATIONALLICENCE 700 1- Norris David Centre for Ecology and Hydrology, Deiniol Road, LL57 2UP, Bangor, UK aut NATIONALLICENCE 700 1- Davies Jennifer Centre for Ecology and Hydrology, Crowmarsh Gifford, OX10 8BB, Wallingford, UK aut NATIONALLICENCE 700 1- Coull Malcolm Macaulay Institute, Craigiebuckler, AB15 8QH, Aberdeen, UK aut NATIONALLICENCE 773 0- Ecosystems Springer-Verlag; www.springer-ny.com 9/3(2006-04-01), 453-462 1432-9840 9:3<453 2006 9 10021 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer