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Discussion of the effects of N with and without acidified S on a sitka spruce ecosystem after 5 years treatment
2002
Sheppard, L.J. | (CEH Edinburgh Bush Estate, Edinburgh (United Kingdom)) | Crossley, A. | Ingleby, K. | Carfrae, J. | Harvey, F. | Kennedy, V.
Significant differences in the effects of N alone compared with NS Acid have been found with respect to eutrophication and acidification. N alone had no effect on the pleurocarpous mosses, whereas NS Acid caused their death within 2 years. Both treatments enhanced stem area increment and N alone also doubled fine root growth. By contrast NS Acid treatments increased litterfall in a a dose response fashion
Показать больше [+] Меньше [-]Root and shoot growth, assimilate partitioning and cell proliferation in roots of Sitka spruce (Picea sitchensis) grown in filtered and unfiltered chambers
1996
Bambridge, L. | Harmer, R. | Macleod, R. (AES Department, Ridley Building, Newcastle University, Newcastle upon Tyne, Tyne and Wear NE2 7RU (United Kingdom))
An investigation of the impact of afforestation on stream-water chemistry in the Loch Dee catchment, SW Scotland
1995
Nisbet, T.R. | Fowler, D. | Smith, R.I. (Forestry Authority Division Research, Alice Holt Lodge, Farnham, Surrey, GU10 4LH (United Kingdom))
The relationship between nitrogen deposition, species composition and foliar nitrogen concentrations in woodland flora in the vicinity of livestock farms
1998
Pitcairn, C.E.R. | Leith, I.D. | Sheppard, L.J. | Sutton, M.A. | Fowler, D. | Munro, R.C. | Tang, S. | Wilson, D. (Institute of Terrestrial Ecology, Bush Estate, Penicuik, Midlothian, EH26 0QB (United Kingdom))
Field application of acid mist to a single clone of Sitka spruce: effects on foliar nutrition and frost hardiness
1997
Sheppard, L.J. | Crossley, A. | Harvey, F.J. | Wilson, D. | Cape, J.N. (Institute of Terrestrial Ecology, Bush Estate, Penicuik, Midlothian, EH26 0QB (United Kingdom))
Spatial patterns in stream nitrate concentrations in upland Wales in relation to catchment forest cover and forest age
1994
Reynolds, B. | Ormerod, S.J. | Gee, A.S. (Institute of Terrestrial Ecology, Bangor Research Station, c/o University College North Wales, Bangor, Gwynedd (United Kingdom))
Open-top chamber and field exposure of Sitka spruce to simulated acid mist: a comparison of results
1997
Sheppard, L.J. | Leith, I.D. | Morris, E. | Cape, J.N. | Roberts, D. (Institute of Terrestrial Ecology, Bush Estate, Penicuik, Midlothian, EH26 0QB (United Kingdom))
Stem growth reduction in mature Sitka spruce trees exposed to acid mist
1997
Crossley, A. | Sheppard, L.J. | Cape, J.N. | Smith, R.I. | Harvey, F.J. (Institute of Terrestial Ecology, Bush Estate, Penicuik, Midlothian, EH26 0QB (United Kingdom))
Interactions between Sitka spruce, the green spruce aphid, sulphur dioxide pollution and drought
1990
Warrington, S. | Whittaker, J.B. (Bath College of Higher Education, Newton Park, Bath BA2 9BN (United Kingdom))
Atmospheric Transfer and Deposition Mechanisms of ²¹⁰Pb Aerosols onto Forest Soils
2009
Likuku, Alfred S
Activities of ²¹⁰Pb carrier aerosols in an age-graded Sitka spruce conifer, three deciduous (oak, lime and sycamore) foliage and in rain and throughfall samples have been measured during the period of 2001-2002. The ²¹⁰Pb concentrations in the age-graded Sitka leaf needles have shown to accumulate until a steady state between accretion and loss of particulate matter is maintained with time. Similarly, the concentrations of ²¹⁰Pb on deciduous tree leaves increased with time until the leaves began to senesce. The ²¹⁰Pb inventory in bulk precipitation was significantly (r ² = 0.99; P < 0.001) large compared with that in throughfall samples, as indicated by a ratio of 1 to 0.1 of ²¹⁰Pb deposition in bulk precipitation to throughfall. This suggests that ²¹⁰Pb is retained in the Sitka spruce foliage during deposition until transfer to the ground mainly through litterfall. These findings suggest that the presence of woodland is responsible for enhanced ²¹⁰Pb deposition fluxes beneath wooded areas relative to open grassland soils.
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