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Journal of Forest Research

, Volume 16, Issue 6, pp 438–445 | Cite as

Precipitation chemistry at a high elevation forest in central Taiwan

  • Shih-Bin Ding
  • Teng-Chiu Lin
  • Shih-Chien Chan
  • Jeen-Liang Huang
  • Neng-Hui Lin
Original Article

Abstract

High elevation ecosystems are particularly sensitive to environmental change. Mountain agriculture is extending to areas at high elevations in Taiwan but the effects on nutrient cycling of the surrounding ecosystems are largely unknown. We examined precipitation chemistry at Piluchi Experimental Forest in central Taiwan to evaluate the contributions of local air pollution and long-range transport of air pollutants on nutrient cycling at this seemingly remote forest. Sea-salt aerosols and anthropogenic pollutants resulting from long-range transport of air pollutants and mountain agriculture activities are the key factors affecting precipitation chemistry at Piluchi Experimental Forest. Precipitation chemistry was dominated by ions of oceanic origin in the summer and by anthropogenic pollutants SO4 2−, NO3 and NH4 + in the winter and spring, the northeast monsoon season. The much higher concentrations of S and N in the northeast monsoon season than the summer suggest a substantial contribution from long-range transport as the prevailing air masses moved from inland China and passed over the industrialized east coast of China before arriving in Taiwan. The very high concentration of NH4 + (22 μeq L−1) in the spring, when the local application of N-containing fertilizers was high, signifies the influences of mountain agriculture. Despite very low concentrations relative to other sites in Taiwan, annual input of NH4 + (3.6 kg ha−1 year−1), NO3 (7.2 kg ha−1 year−1) and SO4 2− (10 kg ha−1 year−1) via precipitation was substantial suggesting that high elevation ecosystems of Taiwan are not free from the threat of atmospheric deposition of pollutants.

Keywords

High elevation agriculture Long-range transport Monsoon season Nitrogen fertilizer Precipitation chemistry 

Notes

Acknowledgments

The study was supported in part by National Science Council (NSC94-2815-C-018-014-B) and Archilife Research Foundation. We thank Matt Vadeboncoeur and Dr. Joshua West for insightful comments on previous versions of the manuscript.

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Copyright information

© The Japanese Forest Society and Springer 2010

Authors and Affiliations

  • Shih-Bin Ding
    • 1
  • Teng-Chiu Lin
    • 2
  • Shih-Chien Chan
    • 3
  • Jeen-Liang Huang
    • 4
  • Neng-Hui Lin
    • 5
  1. 1.Department of GeographyNational Taiwan UniversityTaipeiTaiwan
  2. 2.Department of Life ScienceNational Taiwan Normal UniversityTaipeiTaiwan
  3. 3.Department of GeographyNational Changhua University of EducationChanghua CityTaiwan
  4. 4.Taiwan Forestry Research InstituteTaipeiTaiwan
  5. 5.Department of Atmospheric ScienceNational Central UniversityJhongli CityTaiwan

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