ArticleApplied and environmental microbiology2011
Diversity, abundance, and potential activity of nitrifying and nitrate-reducing microbial assemblages in a subglacial ecosystem.
Article in Applied and environmental microbiology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers.
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Who cites it
38 citing papers in PubMed, 145 citations in OpenAlex.
- Genetic isolation and metabolic complexity of an Antarctic subglacial microbiome.Nature communications · 2025Article
- Microbial communities in glacial lakes of Glacier National Park, MT, USA.FEMS microbiology ecology · 2025Article
- The Spatial Dynamics of Diazotrophs in the Forefield of Three Tibetan Glaciers.Microbial ecology · 2024Article
- Microbial genetic potential differs among cryospheric habitats of the Damma glacier.Microbial genomics · 2024Article
- Changes in Diversity and Abundance of Ammonia-Oxidizing Archaea and Bacteria along a Glacier Retreating Chronosequence in the Tianshan Mountains, China.Microorganisms · 2023Article
- Metagenome-assembled genomes from High Arctic glaciers highlight the vulnerability of glacier-associated microbiota and their activities to habitat loss.Microbial genomics · 2023Article
- Perspectives on the Drosophila melanogaster Model for Advances in Toxicological Science.Current protocols · 2023Review
- The microbiome of cryospheric ecosystems.Nature communications · 2022Article
- Catchment characteristics and seasonality control the composition of microbial assemblages exported from three outlet glaciers of the Greenland Ice Sheet.Frontiers in microbiology · 2022Article
- Bacterioplankton seasonality in deep high-mountain lakes.Frontiers in microbiology · 2022Article
- Lithogenic hydrogen supports microbial primary production in subglacial and proglacial environments.Proceedings of the National Academy of Sciences of the United States of America · 2021Article
- Patterns in Microbial Assemblages Exported From the Meltwater of Arctic and Sub-Arctic Glaciers.Frontiers in microbiology · 2020Article
- Cold AdaptedMicroorganisms · 2019Article
- HJournal of microbiology (Seoul, Korea) · 2019Article
- Ice sheets matter for the global carbon cycle.Nature communications · 2019Review
- Community Composition and Transcriptional Activity of Ammonia-Oxidizing Prokaryotes of SeagrassFrontiers in microbiology · 2018Article
- Primary productivity of snow algae communities on stratovolcanoes of the Pacific Northwest.Geobiology · 2017Article
- The microbiome of glaciers and ice sheets.NPJ biofilms and microbiomes · 2017Article
- Elevated NEnvironmental science and pollution research international · 2017Article
- Diversity and abundance of microbial eukaryotes in stream sediments from Svalbard.Polar biology · 2017Article
Corrections and comments
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Authors and funding
9 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Subglacial sediments sampled from beneath Robertson Glacier (RG), Alberta, Canada, were shown to harbor diverse assemblages of potential nitrifiers, nitrate reducers, and diazotrophs, as assessed by amoA, narG, and nifH gene biomarker diversity. Although archaeal amoA genes were detected, they were less abundant and less diverse than bacterial amoA, suggesting that bacteria are the predominant nitrifiers in RG sediments. Maximum nitrification and nitrate reduction rates in microcosms incubated at 4°C were 280 and 18.5 nmol of N per g of dry weight sediment per day, respectively, indicating the potential for these processes to occur in situ. Geochemical analyses of subglacial sediment pore waters and bulk subglacial meltwaters revealed low concentrations of inorganic and organic nitrogen compounds. These data, when coupled with a C/N atomic ratio of dissolved organic matter in subglacial pore waters of ~210, indicate that the sediment communities are N limited. This may reflect the combined biological activities of organic N mineralization, nitrification, and nitrate reduction. Despite evidence of N limitation and the detection of nifH, we were unable to detect biological nitrogen fixation activity in subglacial sediments. Collectively, the results presented here suggest a role for nitrification and nitrate reduction in sustaining microbial life in subglacial environments. Considering that ice currently covers 11% of the terrestrial landmass and has covered significantly greater portions of Earth at times in the past, the demonstration of nitrification and nitrate reduction in subglacial environments furthers our understanding of the potential for these environments to contribute to global biogeochemical cycles on glacial-interglacial timescales.
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