Archaeal ammonia oxidizers respond to soil factors at smaller spatial scales than the overall archaeal community does in a high arctic polar oasis

Banerjee, Samiran and Kennedy, Nabla and Richardson, Alan E. and Egger, Keith N. and Siciliano, Steven D. (2016) Archaeal ammonia oxidizers respond to soil factors at smaller spatial scales than the overall archaeal community does in a high arctic polar oasis. Canadian Journal of Microbiology, 62 (6). pp. 485-491. ISSN 0008-4166

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Abstract

Archaea are ubiquitous and highly abundant in Arctic soils. Because of their oligotrophic nature, archaea play an important role in biogeochemical processes in nutrient-limited Arctic soils. With the existing knowledge of high archaeal abundance and functional potential in Arctic soils, this study employed terminal restriction fragment length polymorphism (t-RFLP) profiling and geostatistical analysis to explore spatial dependency and edaphic determinants of the overall archaeal (ARC) and ammonia-oxidizing archaeal (AOA) communities in a high Arctic polar oasis soil. ARC communities were spatially dependent at the 2–5 m scale (P < 0.05), whereas AOA communities were dependent at the 1 m scale (P < 0.0001). Soil moisture, pH, and total carbon content were key edaphic factors driving both the ARC and AOA community structure. However, AOA evenness had simultaneous correlations with dissolved organic nitrogen and mineral nitrogen, indicating a possible niche differentiation for AOA in which dry mineral and wet organic soil microsites support different AOA genotypes. Richness, evenness, and diversity indices of both ARC and AOA communities showed high spatial dependency along the landscape and resembled scaling of edaphic factors. The spatial link between archaeal community structure and soil resources found in this study has implications for predictive understanding of archaea-driven processes in polar oases.

Item Type:	Article
Additional Information:	Publisher Copyright: © 2015, National Research Council of Canada. All rights reserved.
Uncontrolled Keywords:	/dk/atira/pure/subjectarea/asjc/2400/2404
Departments or Groups:
Depositing User:	Admin SSL
Date Deposited:	19 Oct 2022 23:04
Last Modified:	07 Jun 2023 18:43
URI:	http://repository-testing.wit.ie/id/eprint/3920

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