Search Results - "Leith, I. D"

Can ammonia tolerance amongst lichen functional groups be explained by physiological responses? by Munzi, S., Cruz, C., Branquinho, C., Pinho, P., Leith, I.D., Sheppard, L.J.

“…Ammonia (NH3) empirical critical levels for Europe were re-evaluated in 2009, based mainly on the ecological responses of lichen communities without…”
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Evidence for changing the critical level for ammonia by Cape, J.N., van der Eerden, L.J., Sheppard, L.J., Leith, I.D., Sutton, M.A.

“…The current critical level for ammonia (CLE NH3) in Europe is set at 8 μg NH 3 m −3 as an annual average concentration. Recent evidence has shown specific…”
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Water soluble aerosols and gases at a UK background site - Part 1: Controls of PM2.5 and PM10 aerosol composition by Twigg, M M, Di Marco, C F, Leeson, S, van Dijk, N, Jones, M R, Leith, I D, Morrison, E, Coyle, M, Proost, R, Peeters, A N M

“…There is limited availability of long-term, high temporal resolution, chemically speciated aerosol measurements which can provide further insight into the…”
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Synthesizing greenhouse gas fluxes across nine European peatlands and shrublands – responses to climatic and environmental changes by Carter, M. S, Larsen, K. S, Emmett, B, Estiarte, M, Field, C, Leith, I. D, Lund, M, Meijide, A, Mills, R. T. E, Niinemets, Ã, Peñuelas, J, Portillo-Estrada, M, Schmidt, I. K, Selsted, M. B, Sheppard, L. J, Sowerby, A, Tietema, A, Beier, C

“…In this study, we compare annual fluxes of methane (CH4), nitrous oxide (N2O) and soil respiratory carbon dioxide (CO2) measured at nine European peatlands (n…”
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Fate of N in a peatland, Whim bog: immobilisation in the vegetation and peat, leakage into pore water and losses as N2O depend on the form of N by Sheppard, L J, Leith, I D, Leeson, S R, van Dijk, N, Field, C, Levy, P

“…Peatlands represent a vast carbon reserve that has accumulated under conditions of low nitrogen availability. Given the strong coupling between the carbon and…”
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Physiological and morphological effects of long-term ammonium or nitrate deposition on the green and red (shade and open grown) Sphagnum capillifolium by Manninen, S., Woods, C., Leith, I.D., Sheppard, L.J.

“…► N enhancement affects leaf morphology, especially size of hyaline cells. ► The effects on leaf morphology differ between wet-deposited ammonium and nitrate…”
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Bioindicators of enhanced nitrogen deposition by Pitcairn, C.E.R, Fowler, D, Leith, I.D, Sheppard, L.J, Sutton, M.A, Kennedy, V, Okello, E

“…Increased deposition of atmospheric N largely from intensive agriculture is affecting biodiversity and the composition of natural and semi-natural vegetation…”
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Patterns and source analysis for atmospheric mercury at Auchencorth Moss, Scotland by Kentisbeer, J, Leeson, S R, Malcolm, H M, Leith, I D, Braban, C F, Cape, J N

“…Gaseous elemental (GEM), particulate bound (PBM) and gaseous oxidised (GOM) mercury species were monitored between 2009 and 2011 at the rural monitoring site,…”
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A Study of the Epiphytic Communities of Atlantic Oak Woods along an Atmospheric Nitrogen Deposition Gradient by Mitchell, R. J., Truscot, A. M., Leith, I. D., Cape, J. N., van Dijk, N., Tang, Y. S., Fowler, D., Sutton, M. A.

“…1 Atlantic oak woods are of high conservation value and contain many rare lichens and bryophytes. The effects of nitrogen pollution on these epiphytic…”
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The relationship between nitrogen deposition, species composition and foliar nitrogen concentrations in woodland flora in the vicinity of livestock farms by Pitcairn, C.E.R., Leith, I.D., Sheppard, L.J., Sutton, M.A., Fowler, D., Munro, R.C., Tang, S., Wilson, D.

“…Measurements of atmospheric ammonia concentration along a gradient of decreasing concentration, species composition and tissue nitrogen content of a range of…”
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Potassium and phosphorus additions modify the response of Sphagnum capillifolium growing on a Scottish ombrotrophic bog to enhanced nitrogen deposition by Carfrae, J.A., Sheppard, L.J., Raven, J.A., Leith, I.D., Crossley, A.

“…This study reports the impacts of wet reduced versus oxidised N on in situ responses of Sphagnum capillifolium: architecture, chemistry and F v/ F m. Nitrogen…”
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Growth and Tissue Nitrogen of Epiphytic Atlantic Bryophytes: Effects of Increased and Decreased Atmospheric N Deposition by Mitchell, R. J., Sutton, M. A., A.-M. Truscott, Leith, I. D., Cape, J. N., Pitcairn, C. E. R., Van Dijk, N.

“…1. Atlantic bryophytes are of European conservation importance, yet the effect on them of excess atmospheric nitrogen is relatively unknown. This study…”
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Can the foliar nitrogen concentration of upland vegetation be used for predicting atmospheric nitrogen deposition? Evidence from field surveys by Hicks, W.K., Leith, I.D., Woodin, S.J., Fowler, D.

“…“Capsule”: Upland plant species may be used as biomonitors of nitrogen deposition. The deposition of atmospheric nitrogen can be enhanced at high altitude…”
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The influence of nitrogen in stemflow and precipitation on epiphytic bryophytes, Isothecium myosuroides Brid., Dicranum scoparium Hewd. and Thuidium tamariscinum (Hewd.) Schimp of Atlantic oakwoods by Leith, I.D., Mitchell, R.J., Truscott, A.-M., Cape, J.N., van Dijk, N., Smith, R.I., Fowler, D., Sutton, M.A.

“…The spatial relationship between the concentration and deposition of the major ions in precipitation and stemflow and their influence on the tissue nitrogen…”
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Nitrogen deposition does not enhance Sphagnum decomposition by Manninen, S., Kivimäki, S., Leith, I.D., Leeson, S.R., Sheppard, L.J.

“…Long-term additions of nitrogen (N) to peatlands have altered bryophyte growth, species dominance, N content in peat and peat water, and often resulted in…”
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Methane emission rates from a northern wetland; response to temperature, water table and transport by Macdonald, J.A, Fowler, D, Hargreaves, K.J, Skiba, U, Leith, I.D, Murray, M.B

“…Static chamber measurements of CH 4 flux were made from a range of micro-environments in an area of blanket bog in Northern Scotland. CH 4 flux covered a wide…”
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Exchange of organic solvents between the atmosphere and grass — the use of open top chambers by Binnie, J., Cape, J.N., Mackie, N., Leith, I.D.

“…Volatile organic compounds (VOC) are of increasing environmental significance as a result of continually increasing volumes of traffic on European roads. An…”
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Response of phosphomonoesterase activity in the lichen Cladonia portentosa to nitrogen and phosphorus enrichment in a field manipulation experiment by Hogan, E.J, Minnullina, G, Sheppard, L.J, Leith, I.D, Crittenden, P.D

“…Effects of nitrogen (N) enrichment on the heathland lichen Cladonia portentosa were quantified to test the hypothesis that modified N : phosphorus (P)…”
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Effects of VOCs on herbaceous plants in an open-top chamber experiment by Cape, J.N., Leith, I.D., Binnie, J., Content, J., Donkin, M., Skewes, M., Price, D.N., Brown, A.R., Sharpe, A.D.

“…Birdsfoot trefoil and broad-leaved dock were affected by VOCs. A selection of herbaceous plants representing the ground flora around a typical chemical…”
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Foliar Nitrogen as an Indicator of Nitrogen Deposition and Critical Loads Exceedance on a European Scale by Pitcairn, Carole Er, Leith, Ian D, Fowler, David, Hargreaves, Ken J, Moghaddam, Masoud, Kennedy, Valerie H, Granat, Lennart

“…The foliar N content of bryophytes and Calluna vulgaris (L.) has been shown to be an indicator of atmospheric N deposition in the UK at a regional scale…”
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