Rapid amino acid cycling in Arctic and Antarctic soils

Amino acids constitute one of the largest inputs of organic nitrogen (N) to most polar soils and have been hypothesized to be important in regulating vegetational succession and productivity in Arctic ecosystems. Our understanding of amino acid cycling in these soils is poor. The aim of this study w...

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Bibliographic Details
Published in:Water, Air, & Soil Pollution: Focus
Main Authors: Jones, Davey L., Farrar, John F., Newsham, Kevin K.
Other Authors: Sheppard, Lucy, Fowler, David, Davison, Alan, Sprent, Janet, Joint, Ian, Tipping, Ed
Format: Article in Journal/Newspaper
Language:English
Published: Springer Science + Business Media 2004
Subjects:
amino acids
Antarctica
Arctic Ocean
Arctic region
chemical composition
dissolved nitrogen
geochemical cycle
Geochemistry of rocks
soils
and sediments
nitrates
nitrogen
nitrogen cycle
organic acids
organic compounds
organic nitrogen
polar regions
solutes
Antarc*
Antarctic
Arctic
Online Access:https://doi.org/10.1007/s11267-004-3027-z
https://researchportal.murdoch.edu.au/esploro/outputs/journalArticle/Rapid-amino-acid-cycling-in-Arctic/991005560439007891
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Summary:Amino acids constitute one of the largest inputs of organic nitrogen (N) to most polar soils and have been hypothesized to be important in regulating vegetational succession and productivity in Arctic ecosystems. Our understanding of amino acid cycling in these soils is poor. The aim of this study was to investigate the size and rate of turnover of the amino acid pool in a range of Arctic and Antarctic soils. Our results indicate that in polar soils with either high or low ornithogenic inputs the amino acid pool is small in comparison to the inorganic N pool. The free amino acid pool constituted only a small proportion of the total dissolved organic nitrogen (DON) pool in these soils. Here we show that these low concentrations may be due to rapid use by the soil microbial community in both Arctic and Antarctic soils.

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