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자료유형
학술저널
저자정보
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강원대학교 산림과학연구소 Journal of forest and environmental science Journal of forest and environmental science 제29권 제2호
발행연도
2013.1
수록면
116 - 124 (9page)

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Differences in rates and patterns of nitrogen cycling have been correlated with nitrogen stable isotope measurements in forest ecosystems of tropical and temperate regions, but limited similar work has been conducted in sub-tropical forests. This study investigated patterns in stable N isotopic composition in a subtropical forest in Taiwan by sampling three soil profiles and overstory and understory foliage. Soil δ15N in the forest floor ranged from -1.8 to 1.8‰. Mineral soils had higher δ15N (4.1 to 6.0‰). Foliage δ15N in overstory trees ranged from -6.6 to -2.0‰, and understory foliage δ15N ranged from -5.0 to -1.2‰. There was a weak correlation between foliar % N and δ15N (r2=0.214). Compared to results from similar surveys in tropical and temperate forests, foliar δ15N values were generally lower. These results help highlight the need for improved knowledge regarding the relationships between patterns in N stable isotopes and processes affecting rates of N cycling, especially as related to wider scale patterns in forest ecosystems within the east-Asia region.

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