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Relating Tree Ring Chemistry of Pinus densiflora to Precipitation Acidity in an Industrial Area of South Korea |
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| Authors: | Jin-Hyeob Kwak Sang-Sun Lim Hyun-Jung Park Sun-Il Lee Kye-Han Lee Han-Yong Kim Scott X Chang Sang-Mo Lee Hee-Myong Ro Woo-Jung Choi |
| Institution: | 1. Department of Biosystems and Agricultural Engineering, Institute of Agricultural Science and Technology, Chonnam National University, Gwangju, 500-757, South Korea 2. Department of Forestry, Chonnam National University, Gwangju, 500-757, South Korea 3. Department of Plant Science, Chonnam National University, Gwangju, 500-757, South Korea 4. Department of Renewable Resources, University of Alberta, Edmonton, AB, Canada, T6G 2E3 5. National Instrumentation Center for Environmental Management, Seoul National University, Seoul, 151-742, South Korea 6. Department of Agricultural Biotechnology, Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, South Korea |
| Abstract: | To test the possible use of tree ring chemical properties as proxies for precipitation acidity (H+]), we investigated the relationships between tree ring chemistry (δ13C, δ15N, Ca-to-Al ratio, and N concentration) of Pinus densiflora and precipitation H+] between 1992 and 2005 in an industrial area in the southwest region of South Korea. Statistical analyses showed that all tree ring chemistry parameters were significantly correlated with precipitation H+]. Tree ring δ13C was negatively correlated with precipitation acidity (r?=??0.67, P?<?0.01), reflecting the photosynthetic fixation of 13C-depleted CO2 from fossil fuel combustion that would be the primary source of precipitation acidity. A positive correlation of N concentration (r?=?0.89, P?<?0.001) and a negative correlation of δ15N (r?=??0.63, P?<?0.05) in tree rings with precipitation acidity most likely reflected the influence of 15N-depleted N compounds deposited via precipitation. The Ca-to-Al ratio was negatively (r?=??0.58, P?<?0.05) correlated with precipitation acidity, indicating that soil acidification caused the loss of Ca from the soil and solubilization of Al resulting from acid precipitation. Such relationships suggest that δ13C, δ15N, N concentration, and Ca-to-Al ratio in tree rings can be reliably used to evaluate the impact of acid precipitation on the studied P. densiflora stands. |
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