지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2013.1
- 수록면
- 583 - 590 (8page)
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초록· 키워드
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Historical growth response of Quercus variabilis, which is the most important deciduous timber species in Korea, was investigated using the width and C isotope ratio ($^{13}C/^{12}C$ denoted as ${\delta}^{13}C$) of the annual ring from 1975 to 2007. Tree disks were collected from three Q. variabilis trees with different growth statuses from a site in the Mt. Naejang area, and analyzed for annual ring width and ${\delta}^{13}C$. Basal area increment (BAI) of the annual ring was calculated from the width data, and carbon isotope discrimination (${\Delta}$) was calculated using ${\delta}^{13}C$. The intercorrelations among BAI, ${\Delta}$, and environmental variables were explored. The BAI was positively (p <0.001) correlated with atmospheric $CO_2$ concentration ([$CO_2$]), reflecting increased net photosynthesis with [$CO_2$], whereas the negative correlations of BAI with either $NO_2$ (p <0.05) or $O_3$ (p <0.05) concentrations suggested that atmospheric pollution might have restricted tree growth to some degree. The ${\Delta}$ was positively correlated with both temperature (p <0.05) and [$CO_2$] (p <0.001), and BAI was also positively correlated with ${\Delta}$ (p <0.001). However, precipitation was correlated with neither BAI nor ${\Delta}$, indicating that the precipitation amount is sufficient for tree growth in the study site. Such relationships suggest that stomatal rather than non-stomatal control is the predominant mechanism of photosynthetic acclimation of Q. variabilis under changing environmental conditions in the study site where water availability is not limited.
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