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Stable Nitrogen Isotopes in a Forested Watershed in Taiwan
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 Title & Authors
Stable Nitrogen Isotopes in a Forested Watershed in Taiwan
Owen, Jeffrey S.;
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 Abstract
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 in the forest floor ranged from -1.8 to -1.8‰. Mineral soils had higher (4.1 to 6.0‰). Foliage in overstory trees ranged from -6.6 to -2.0‰, and understory foliage ranged from -5.0 to -1.2‰. There was a weak correlation between foliar % N and (). Compared to results from similar surveys in tropical and temperate forests, foliar 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.
 Keywords
foliar ;forest soils;nitrogen;stable isotopes;Taiwan;
 Language
English
 Cited by
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