Altitudinal gradients of natural abundance of stable isotopes of nitrogen and carbon in the needles and soil of a pine forest in Nepal
| Autor: | R. Brumme, S. P. Sah |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
010504 meteorology & atmospheric sciences
biology Ecology Soil Science chemistry.chemical_element Forestry 04 agricultural and veterinary sciences 15. Life on land Altitudinal zonation biology.organism_classification 01 natural sciences Nitrogen Isotopes of nitrogen Altitude Geography Agronomy chemistry Abundance (ecology) Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Nitrification 0105 earth and related environmental sciences Pinus roxburghii |
| Zdroj: | Journal of Forest Science. 49:19-26 |
| ISSN: | 1805-935X 1212-4834 |
| DOI: | 10.17221/4673-jfs |
| Popis: | This paper deals with natural abundance of 15 N and 13 C in the soil and needles of the pine forest (Pinus roxburghii, Sargent) along an altitudinal gradient. The study area lies in the elevation range of 1,200 m to 2,200 m in Kathmandu valley of Nepal. The higher altitude soil was found to be much more depleted of 13 C than the lower altitude soil. The decreasing trend of C-isotope (as well as the trend of N-isotope) might be attributed to the lower mineralisation rate and net nitrification rate at the higher altitude. The observed differences in isotopic N- and C-contents of needles and soils across altitudinal gradients in this study are a result of the combination of environmentally induced variations in physiological and morphological differences. For example, altitudinal variation in needle δ 15 N and δ 13 C at the research site indicates that the needle isotopic composition is related to nitrogen availability at a site. |
| Databáze: | OpenAIRE |
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