ArticleFEMS microbiology ecology2020
The distribution and relative ecological roles of autotrophic and heterotrophic diazotrophs in the McMurdo Dry Valleys, Antarctica.
Article in FEMS microbiology ecology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed, 25 citations in OpenAlex.
- Metabolic transitions along a moisture gradient in a poly-extreme high-altitude desert ecosystem within the Atacama Desert.Environmental microbiome · 2026Article
- Geology defines microbiome structure and composition in nunataks and valleys of the Sør Rondane Mountains, East Antarctica.Frontiers in microbiology · 2024Article
- Great Facilitation of Thirty Years of Reforestation with Mixed Species to Ecosystem Nitrogen Accumulation in Dry-Hot Valley in the Jinsha River.International journal of environmental research and public health · 2022Article
- Microbial Journey: Mount Everest to Mars.Indian journal of microbiology · 2022Review
- Unique Geothermal Chemistry Shapes Microbial Communities on Mt. Erebus, Antarctica.Frontiers in microbiology · 2022Article
- Planktonic Aggregates as Hotspots for Heterotrophic Diazotrophy: The Plot Thickens.Frontiers in microbiology · 2022Review
- The spatial distribution and biogeochemical drivers of nitrogen cycle genes in an Antarctic desert.Frontiers in microbiology · 2022Article
- Geochemically Defined Space-for-Time Transects Successfully Capture Microbial Dynamics Along Lacustrine Chronosequences in a Polar Desert.Frontiers in microbiology · 2021Article
- Gullies and Moraines Are Islands of Biodiversity in an Arid, Mountain Landscape, Asgard Range, Antarctica.Frontiers in microbiology · 2021Article
- Microbial Nitrogen Cycling in Antarctic Soils.Microorganisms · 2020Review
- Microbial Mats of the McMurdo Dry Valleys, Antarctica: Oases of Biological Activity in a Very Cold Desert.Frontiers in microbiology · 2020Article
Corrections and comments
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Authors and funding
10 authors at 5 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The McMurdo Dry Valleys (MDV) in Antarctica harbor a diverse assemblage of mat-forming diazotrophic cyanobacteria that play a key role in nitrogen cycling. Prior research showed that heterotrophic diazotrophs also make a substantial contribution to nitrogen fixation in MDV. The goals of this study were to survey autotrophic and heterotrophic diazotrophs across the MDV to investigate factors that regulate the distribution and relative ecological roles of each group. Results indicated that diazotrophs were present only in samples with mats, suggesting a metabolic coupling between autotrophic and heterotrophic diazotrophs. Analysis of 16S rRNA and nifH gene sequences also showed that diazotrophs were significantly correlated to the broader bacterial community, while co-occurrence network analysis revealed potential interspecific interactions. Consistent with previous studies, heterotrophic diazotrophs in MDV were diverse, but largely limited to lakes and their outlet streams, or other environments protected from desiccation. Despite the limited distribution, heterotrophic diazotrophs may make a substantial contribution to the nitrogen budget of MDV due to larger surface area and longer residence times of lakes. This work contributes to our understanding of key drivers of bacterial community structure in polar deserts and informs future efforts to investigate the contribution of nitrogen fixation to MDV ecosystems.
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