Base cation leaching from the canopy of a subtropical rainforest in northeastern Taiwan

T. C. Lin, S. P. Hamburg, Y. J. Hsia, H. B. King, L. J. Wang, K. C. Lin

研究成果: 雜誌貢獻文章

24 引文 斯高帕斯(Scopus)

摘要

We examined base cation leaching from the canopy of a subtropical rainforest in northeastern Taiwan. The forest is characterized by extremely low levels of base cations in both canopy vegetation and in the soils. The rates of canopy leaching of K+,Ca2+, and Mg2+ were very high, representing up to 30, 35, and 190%, respectively, of the amount stored in leaves. The rate of H+ retention in the canopy was close to the rate of base cation leaching, suggesting that cation leaching is neutralizing acid precipitation. The subtropical forest studied leached cations from the canopy throughout the year, unlike temperate deciduous forests, which are physiologically inert in the winter. The forest canopy of the subtropical forest we studied is impacted by acid deposition and fog throughout the winter because of frequent rainfall and high relative humidity. This continuous exposure to acid precipitation could cause more intense negative effects on the canopy of subtropical forests as compared with temperate forests exposed to similar pollution loads. We suggest that the low base status of subtropical forests growing on low base status soils may make them very vulnerable to the negative effects of air pollution.

原文英語
頁(從 - 到)1156-1163
頁數8
期刊Canadian Journal of Forest Research
31
發行號7
DOIs
出版狀態已發佈 - 2001 一月 1

    指紋

ASJC Scopus subject areas

  • Global and Planetary Change
  • Forestry
  • Ecology

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