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Identification of coniferous forests with incipient nitrogen saturation through analysis of arginine and nitrogen-15 abundance of trees


, : Identification of coniferous forests with incipient nitrogen saturation through analysis of arginine and nitrogen-15 abundance of trees. Journal of Environmental Quality 26(1): 302-309

Stands of Norway spruce (Picea abies (L.) Karst.) differing in throughfall N deposition and NO-3- leaching were investigated to determine if arginine concentrations and delta-15N abundances of needles could be used to predict NO-3- leaching from stands. Twenty-three stands, all located in southern Sweden, were sampled and five of these had average NO-3- concentrations gt 0.1 mg NO-3-N L-1 in soil water at a 50-cm depth. Arginine concentrations and delta-15N abundances of needles were significantly higher for sites that exhibited NO-3- leaching. The delta-15N enrichment (epsilon), i.e., difference between foliage and soil organic matter in delta-15N, showed less variation than SIN of needles alone in regressions against NO-3- leaching and was, thus, a better predictor of leaching. All sites that exhibited N leaching had arginine concentrations gt 5 mu-mol g dw-1 and epsilon gt -0.5 (%) and thus, there was a strong correlation between arginine and epsilon values. To test if arginine accumulation, as such, can affect the delta-15N of needles, arginine and delta-15N were determined for Scots pine (Pinus sylvestris L.) trees given different amounts of N fertilizer. Although fertilization caused a dramatic increase in arginine concentrations of needles, no immediate change in delta-15N was observed. A hypothesis is proposed to explain the causal linkage between elevated arginine and delta-15N of needles and leaching of N. Thus, arginine accumulation in trees corresponds to decreased uptake rates of NH-4+ leaving NH-4+ ions available for nitrification. During nitrification, discrimination against the heavier 15N takes place resulting in a depleted NO-3- pool and enriched NH-4+ pool. Preferential uptake of NH-4+ by conifer trees will then lead to elevated 15N abundance of needles. It is concluded that N leaching coniferous forests can be identified through analysis of arginine and delta-15N of needles.

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Cruz Sampaio Antonio Fernando; Pivetti Joao Luciano; Botter Marco Antonio, 1992: Geotechnical problems at urban corridors works; reconstruction of a gallery at the Nove de Julho Avenue. Pages 115-132 1992

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Zimmermann, M., 2002: Management of patients with chronic pain syndromes--deficits and perspectives. Just little more than 10 years ago, pain was still considered a neglected aspect of medicine. Since that time, however, significant progress has been made in this field. The magnitude of the problem is evident from the fact that some 5 million Ger...

Clark, Jp, 1994: Acrolein as a ground squirrel burrow fumigant. Proceedings Vertebrate Pest Conference: (16th) 78-79

Hagiwara, K.; McMenamin, M.G., 2000: Wrapper arms strategy to construct multicomponent plasmids using three-piece ligation. Biotechniques 29(1): 34-36

Shiomi, T.; Maekawa, M.; Watanabe, T., 1990: Cardiocirculatory changes during sleep. Kokyu to Junkan. Respiration & Circulation 38(7): 641-647

Zygierewicz, J.; Sieluzycki, C.; König, R.; Durka, P.J., 2007: Event-related desynchronization and synchronization in MEG: Framework for analysis and illustrative datasets related to discrimination of frequency-modulated tones. We introduce a complete framework for the calculation of statistically significant event-related desynchronization and synchronization (ERD/ERS) in the time-frequency plane for magnetoencephalographic (MEG) data, and provide free Internet access t...

Sadat HashemiKamangar, S.; Ghavam, M.; Mirkhezri, Z.; Karazifard, M.Javad., 2015: Comparison of the Effects of Two Different Drinks on Microhardness of a Silorane-based Composite Resin. Acidic foods and drinks can erode composite resins. Silorane-based composite is a new low shrinkage composite with higher hydrophobicity which might resist the erosive effect of beverages. The aim of this study was to determine the effects of 100%...

Lauterstein A.M.; Ruzansky S., 1969: Tooth anomalies in the anom oral facial digital syndrome child. Teratology 2(2): 137-145

Shozen, K.I.hi; Ohshima, T.; Ushio, H.; Koizumi, C., 1995: Formation of cholesterol oxides in marine fish products induced by grilling. The effect of grilling of marine fish products on the oxidation of cholesterol was investigated by using several kinds of salted-dried and boiled-dried marine fish products. The contents of total lipids decreased slightly in most of samples. Howev...