HR: 1340h
AN: H23D-1447    [Abstracts]
TI: Spatial variations in the concentration and speciation of nitrogen in an upland blanket peat catchment
AU: * Chapman, P
EM: p.j.chapman@leeds.ac.uk
AF: University of Leeds, School of Geography, University of Leeds, Leeds, LS2 9JT United Kingdom
AU: Cundill, A
EM: geoapc@yahoo.co.uk
AF: University of Leeds, School of Geography, University of Leeds, Leeds, LS2 9JT United Kingdom
AU: Kirkby, M
EM: m.j.kirkby@leeds.ac.uk
AF: University of Leeds, School of Geography, University of Leeds, Leeds, LS2 9JT United Kingdom
AU: Adamson, J
EM: jka@ceh.ac.uk
AF: Centre for Ecology and Hydrology, Environmental Change Network, Centre for Ecology and Hydrology, Lancaster Environment Centre, Bailrigg, Lancaster, LA1 4YQ United Kingdom
AB: Nitrogen-saturation and river water N-chemistry is usually evaluated on the basis of sampling at the catchment outlet. However, recent studies have shown that river water NO3-N concentration can show substantial variation along the length of its channel, even over short distances, and is highly scale-dependent. Therefore in order to successfully determine the N saturation of semi-natural temperate ecosystems there is a need for knowledge of small-scale variability in stream water N chemistry and an understanding of the factors that control it. In this study, a survey of 33 tributaries of a peatland catchment in the upland North Pennines of the UK, was undertaken to investigate the variation in the concentration of different dissolved form of nitrogen (nitrate (NO3-N), ammonium (NH4-N) and dissolved organic nitrogen (DON)) in relation to catchment attributes. For each catchment, data on soil type, vegetation cover and geology were compiled. The data are presented and discussed with respect to the spatial distribution of soluble nitrogen forms and concentrations in relation to catchment attributes.
DE: 0414 Biogeochemical cycles, processes, and modeling (0412, 0793, 1615, 4805, 4912)
DE: 0469 Nitrogen cycling
DE: 0496 Water quality
SC: Hydrology [H]
MN: Fall Meeting 2005