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Atmospheric Acid Deposition: Nitrogen Saturation of Forests

Journal of Ecology and Environment / Journal of Ecology and Environment, (P)2287-8327; (E)2288-1220
2006, v.29 no.3, pp.305-321

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Abstract

Atmospheric Acid Deposition: Nitrogen Saturation of Forests: Volume weighted annual averagewet deposition of nitrogen at 33 sites in Korea during 1999-2004 ranged 7.28 to 21.05 kgNha-1yr-1with average 12.78 kgN ha-1yr-1, which values are similar level with nitrogen deposition of Europe and North America. The temperate forests that suffered long-term high atmospheric nitrogen deposition are gradually saturated with nitrogen. Such nitrogen saturated forest watersheds usually leach nitrate ion (NO3-) in stream water and soil solution. It may be likely that Korean forest ecosystems are saturated by much nitrogen system is disturbed, suffered easily frost damage and blight disease, reduced fine-root vitality and mycorrhizal activity. Consequently nitrogen saturated forests decrease primary productivity and finally become forest decline. Futhermore understory species are replaced the nitrophobous species by the nitrophilous one. In soil with nitrogen saturation uptake of methane (CH4) is reduced and emission of nitrogen monoxide (NO) and nitrous oxide (N2O) are increased, which gases are greenhouse gas accelerating global warming.

keywords
Nitrogen deposition, Nitrogen retention, Nitrogen saturation김 준 호 J. Ecol. Field Biol. 29 (3) 306흡수량이 상수리나무숲보다 물오리나무숲에서 적지만 낙엽에 의한 질소 회수량이 그 반대이고, 질소 순환율(흡수량/회수량의 비)이 물오리나무숲(1.15)보다 상수리나무숲(7.70)에서 높음을 보고하였다. 빗물에 의한 습성 질소 강하량은 1985∼1986년에 경기도 수동면에서

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Journal of Ecology and Environment