Acid fog removes calcium and boron from fir tree: One of the possible causes of forest decline

Manabu Igawa, Kensuke Okumura, Hiroshi Okochi, Naoki Sakurai

研究成果: Article

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We have observed acid fog in Mt. Oyama adjacent to the Kanto Plains in Japan, where acid fog under pH 3 has been frequently observed and natural fir forest (Abies firma) has been declining. We applied the simulated acid fog to the needles of fir twigs and the treatment removed calcium, boron, and cell-wall acidic sugars from the needles. We also observed high contents of calcium, boron, and acidic sugars in throughfall collected under the declining forest canopy. Ca++ and Mg++ ion leach via ion-exchange with major cations of fog-water and the amount of leached boron increased with the increase in the concentration of leached Ca++. The deficiency of calcium and boron by leaching could be one of the main causes of decline of the fir forest.

元の言語English
ページ(範囲)213-215
ページ数3
ジャーナルJournal of Forest Research
7
発行部数4
DOI
出版物ステータスPublished - 2002 11 16

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ASJC Scopus subject areas

  • Forestry

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