Ammonium Nitrogen Deposition as a Dominant Source of Nitrogen in a Forested Watershed Experiencing Acid Rain in Central Japan

2010 ◽  
Vol 212 (1-4) ◽  
pp. 337-344 ◽  
Author(s):  
Young-Sik Ham ◽  
Hiromi Kobori ◽  
Joo-Hyon Kang ◽  
Joon Ha Kim
Keyword(s):  
Acid Rain ◽  
Nitrogen Deposition ◽  
Ammonium Nitrogen ◽  
Forested Watershed ◽  
Central Japan ◽  
Dominant Source

scholarly journals Acid rain mitigation experiment shifts a forested watershed from a net sink to a net source of nitrogen

2016 ◽  
Vol 113 (27) ◽  
pp. 7580-7583 ◽  
Author(s):  
Emma J. Rosi-Marshall ◽  
Emily S. Bernhardt ◽  
Donald C. Buso ◽  
Charles T. Driscoll ◽  
Gene E. Likens
Keyword(s):  
Acid Rain ◽  
Inorganic Nitrogen ◽  
Forest Growth ◽  
Mitigation Strategies ◽  
Acid Neutralizing Capacity ◽  
Forested Watershed ◽  
Storm Damage ◽  
Soil Base ◽  
N Losses ◽  
Neutralizing Capacity

Decades of acid rain have acidified forest soils and freshwaters throughout montane forests of the northeastern United States; the resulting loss of soil base cations is hypothesized to be responsible for limiting rates of forest growth throughout the region. In 1999, an experiment was conducted that reversed the long-term trend of soil base cation depletion and tested the hypothesis that calcium limits forest growth in acidified soils. Researchers added 1,189 kg Ca2+ ha−1 as the pelletized mineral wollastonite (CaSiO3) to a 12-ha forested watershed within the Hubbard Brook Experimental Forest in the White Mountains of New Hampshire. Significant increases in the pH and acid-neutralizing capacity of soils and streamwater resulted, and the predicted increase in forest growth occurred. An unanticipated consequence of this acidification mitigation experiment began to emerge a decade later, with marked increases in dissolved inorganic nitrogen (DIN) exports in streamwater from the treated watershed. By 2013, 30-times greater DIN was exported from this base-treated watershed than from adjacent reference watersheds, and DIN exports resulting from this experiment match or exceed earlier reports of inorganic N losses after severe ice-storm damage within the study watershed. The discovery that CaSiO3 enrichment can convert a watershed from a sink to a source of N suggests that numerous potential mechanisms drive watershed N dynamics and provides new insights into the influence of acid deposition mitigation strategies for both carbon cycling and watershed N export.

Acid rain and nitrogen deposition in a sub-tropical watershed (Piracicaba): ecosystem consequences

2003 ◽  
Vol 121 (3) ◽  
pp. 389-399 ◽  
Author(s):  
A.V. Krusche ◽  
P.B. de Camargo ◽  
C.E. Cerri ◽  
M.V. Ballester ◽  
L.B.L.S. Lara ◽  
...  
Keyword(s):  
Acid Rain ◽  
Nitrogen Deposition ◽  
Tropical Watershed

Sulfur accumulation in soil in a forested watershed historically exposed to air pollution in central Japan

Geoderma ◽  
2022 ◽  
Vol 407 ◽  
pp. 115544
Author(s):  
Toko Tanikawa ◽  
Hiroyuki Sase ◽  
Sei Fukushima ◽  
Yoshiaki Ito ◽  
Michiru Yamashita ◽  
...  
Keyword(s):  
Air Pollution ◽  
Forested Watershed ◽  
Central Japan

Acidity neutralization mechanism in a forested watershed in Central Japan

1996 ◽  
Vol 88 (3-4) ◽  
pp. 313-329 ◽  
Author(s):  
Kazuo Sato ◽  
Akira Takahashi
Keyword(s):  
Forested Watershed ◽  
Central Japan
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