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Newsham KK, Danielsen BK, Biersma EM, Elberling B, Hillyard G, Kumari P, Priemé A, Woo C, Yamamoto N. Rapid Response to Experimental Warming of a Microbial Community Inhabiting High Arctic Patterned Ground Soil. BIOLOGY 2022; 11:biology11121819. [PMID: 36552329 PMCID: PMC9775327 DOI: 10.3390/biology11121819] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 12/06/2022] [Accepted: 12/08/2022] [Indexed: 12/23/2022]
Abstract
The influence of climate change on microbial communities inhabiting the sparsely vegetated patterned ground soils that are widespread across the High Arctic is poorly understood. Here, in a four-year experiment on Svalbard, we warmed patterned ground soil with open top chambers and biannually irrigated the soil to predict the responses of its microbial community to rising temperatures and precipitation. A 1 °C rise in summertime soil temperature caused 44% and 78% increases in CO2 efflux and CH4 consumption, respectively, and a 32% increase in the frequency of bacterial 16S ribosomal RNA genes. Bacterial alpha diversity was unaffected by the treatments, but, of the 40 most frequent bacterial taxa, warming caused 44-45% reductions in the relative abundances of a Sphingomonas sp. and Ferruginibacter sp. and 33-91% increases in those of a Phenylobacterium sp. and a member of the Acetobacteraceae. Warming did not influence the frequency of fungal internal transcribed spacer 2 copies, and irrigation had no effects on the measured variables. Our study suggests rapid changes to the activities and abundances of microbes, and particularly bacteria, in High Arctic patterned ground soils as they warm. At current rates of soil warming on Svalbard (0.8 °C per decade), we anticipate that similar effects to those reported here will manifest themselves in the natural environment by approximately the mid 2030s.
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Affiliation(s)
- Kevin K. Newsham
- British Antarctic Survey, NERC, High Cross, Madingley Road, Cambridge CB3 0ET, UK
- Correspondence:
| | - Birgitte Kortegaard Danielsen
- Center for Permafrost, Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Volgade 10, DK-1350 Copenhagen, Denmark
| | | | - Bo Elberling
- Center for Permafrost, Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Volgade 10, DK-1350 Copenhagen, Denmark
| | - Guy Hillyard
- British Antarctic Survey, NERC, High Cross, Madingley Road, Cambridge CB3 0ET, UK
| | - Priyanka Kumari
- Department of Environmental Health Sciences, Graduate School of Public Health, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Anders Priemé
- Center for Permafrost, Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Volgade 10, DK-1350 Copenhagen, Denmark
- Department of Biology, University of Copenhagen, Universitetsparken 15, DK-2100 Copenhagen, Denmark
| | - Cheolwoon Woo
- Department of Environmental Health Sciences, Graduate School of Public Health, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Naomichi Yamamoto
- Department of Environmental Health Sciences, Graduate School of Public Health, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
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