The role of atmospheric n deposition in soil acidification in forest ecosystems

Yong Sik Ok, Scott X. Chang, Yongsheng Feng

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The emissions of NOx and NH3 into the atmosphere are on the rise, and the emitted N compounds are distributed globally, causing concerns over possible effects on human health and the environment. The emission of N occurs primarily from agricultural activities and fossil-fuel combustion (e.g., automobile and industrial boilers). Atmospheric N deposition has become an important factor affecting forest health and sustainability in recent decades, partly as a result of decreasing S emissions. Nitrogen compounds that fall onto soil and water bodies with precipitation and dry deposition can cause damage to ecological systems. Chronic excessive N input can lead to base cation depletion, nutrient imbalances, eutrophication, soil acidification, and forest dieback. Leaching losses of NO3-gradually decrease the acid buffering capacity of forest soils. Moreover, releases of Al and Mn induced by soil acidification cause toxicity to trees. Biological processes play a crucial role in soil acidification, as N compounds originated from atmospheric deposition undergo nutrient cycling processes. However, the effects of N transformation on soil acidification in forest ecosystems are often overlooked. Thus, an improved understanding of the impact of atmospheric N deposition on N cycling processes is needed to better predict the responses of forest ecosystems to such depositions. In this paper, we explore the linkage between N cycling and soil acidification in forest ecosystems, and evaluate the role of N cycling and atmospheric N deposition on soil acidification in forest ecosystems by discussing: 1) the N cycle and its effect on soil acidification in forest ecosystems, 2) the effect of N deposition on forest soils and trees, in terms of base cation depletion, soil acidification, and aluminum toxicity, 3) leaching losses of N from forest soils, and 4) critical loads of atmospheric N deposition in forest ecosystems.

Original languageEnglish
Title of host publicationEcology Research Progress
PublisherNova Science Publishers, Inc.
Pages47-77
Number of pages31
ISBN (Print)1600218075, 9781600218071
Publication statusPublished - 2009 Jan 1
Externally publishedYes

Fingerprint

atmospheric deposition
forest ecosystem
forest soil
cation
leaching
toxicity
forest health
critical load
dieback
soil acidification
nitrogen compound
dry deposition
nutrient cycling
buffering
biological processes
fossil fuel
eutrophication
automobile
aluminum
combustion

Keywords

  • Acidification
  • Aluminum
  • Buffer Capacity
  • Ca/Al Ratio
  • Critical Load
  • Mineralization
  • N Saturation
  • Nitrate
  • Nitrification
  • Nitrogen leaching

ASJC Scopus subject areas

  • Environmental Science(all)

Cite this

Ok, Y. S., Chang, S. X., & Feng, Y. (2009). The role of atmospheric n deposition in soil acidification in forest ecosystems. In Ecology Research Progress (pp. 47-77). Nova Science Publishers, Inc..

The role of atmospheric n deposition in soil acidification in forest ecosystems. / Ok, Yong Sik; Chang, Scott X.; Feng, Yongsheng.

Ecology Research Progress. Nova Science Publishers, Inc., 2009. p. 47-77.

Research output: Chapter in Book/Report/Conference proceedingChapter

Ok, YS, Chang, SX & Feng, Y 2009, The role of atmospheric n deposition in soil acidification in forest ecosystems. in Ecology Research Progress. Nova Science Publishers, Inc., pp. 47-77.
Ok YS, Chang SX, Feng Y. The role of atmospheric n deposition in soil acidification in forest ecosystems. In Ecology Research Progress. Nova Science Publishers, Inc. 2009. p. 47-77
Ok, Yong Sik ; Chang, Scott X. ; Feng, Yongsheng. / The role of atmospheric n deposition in soil acidification in forest ecosystems. Ecology Research Progress. Nova Science Publishers, Inc., 2009. pp. 47-77
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