15N abundance in Antarctica: origin of soil nitrogen and ecological implications

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書誌事項

公開日
1981-07
権利情報
  • http://www.springer.com/tdm
DOI
  • 10.1038/292327a0
公開者
Springer Science and Business Media LLC

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説明

Antarctica offers a unique natural environment from the point of view of nitrogen cycling. Ice-free dry areas,‘Antarctic oases’, and penguin rookeries are of particular interest because of the characteristic distribution of nitrate deposits1–4 and biological materials such as algae and guano. As the distribution of 15N/14N in a geochemical system reflects sources and metabolic pathways of nitrogen5, a study of the nitrogen isotopic composition of Antarctic samples would help us to understand the Antarctic nitrogen cycle. Here we report that nitrate in Antarctic soils is extremely depleted in 15N compared with biogenic nitrogen, and that algae collected from a nitrate-rich saline pond and from a penguin rookery exhibit, respectively, the lowest and the highest 15N/14N ratios among terrestrial biogenic nitrogen so far observed. We also discuss possible causes of these extreme nitrogen isotopic compositions.

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  • Nature

    Nature 292 (5821), 327-329, 1981-07

    Springer Science and Business Media LLC

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