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| http://dx.doi.org/10.1038/ismej.2011.163 | DOI Listing |
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Metal Mobilization from Thawing Permafrost Is an Emergent Risk to Water Resources.
ACS ES T Water
January 2025
Department of Geological Sciences, University of Saskatchewan, 114 Science Pl, Saskatoon, Saskatchewan, Canada, S7N 5E2.
Metals are ubiquitous in Earth's Critical Zone and play key roles in ecosystem function, human health, and water security. They are essential nutrients at low concentrations, yet some metals are toxic at a high dose. Permafrost thaw substantially alters all the physical and chemical processes governing metal mobility, including water movement and solute transport and (bio)geochemical interactions involving water, organic matter, minerals, and microbes.
View Article and Find Full Text PDFNot all is lost: resilience of microbiome samples to freezer failures and long-term storage.
mSphere
December 2024
Department of Microbiology and Plant Pathology, University of California-Riverside, Riverside, California, USA.
Unlabelled: Advances in technology have facilitated extensive sample collection to explore microbiomes across diverse systems, leading to a growing reliance on ultracold freezers for storing both samples and extracted DNA. However, freezer malfunctions can jeopardize data integrity. To evaluate the impact of an unexpected -80°C freezer failure and the recoverability of thawed soil samples, we extracted DNA and compared it to long-term DNA stored at -20°C and original 16S and ITS2 sequencing data collected before the malfunction.
View Article and Find Full Text PDFPotential risks of bacterial plant pathogens from thawing permafrost in the Alaskan tundra.
Ecotoxicol Environ Saf
December 2024
Division of Life Sciences, Korea Polar Research Institute, Incheon 21990, Republic of Korea. Electronic address:
Global warming-induced permafrost thawing raises concerns about the release of dormant microbes, including potentially harmful plant pathogens. However, the potential pathogenic risks associated with the thawing of permafrost remain poorly understood. Here, we conducted a 90-day soil incubation experiment at 4 °C to mimic extended permafrost thawing in Alaskan tundra soils stratified into active (A), transitional (T), and permanently frozen (P) layers.
View Article and Find Full Text PDFDeciphering the Intricate Control of Minerals on Deep Soil Carbon Stability and Persistence in Alaskan Permafrost.
Glob Chang Biol
October 2024
Soil Sciences Section, Institute of Earth System Sciences, Leibniz University, Hannover, Germany.
Understanding the fate of organic carbon in thawed permafrost is crucial for predicting climate feedback. While minerals and microbial necromass are known to play crucial roles in the long-term stability of organic carbon in subsoils, their exact influence on carbon persistence in Arctic permafrost remains uncertain. Our study, combining radiocarbon dating and biomarker analyses, showed that soil organic carbon in Alaskan permafrost had millennial-scale radiocarbon ages and contained only 10%-15% microbial necromass carbon, significantly lower than the global average of ~30%-60%.
View Article and Find Full Text PDFSeminal plasma microbiomes, sperm parameters, and cryopreservation in a healthy fertile population.
Front Microbiol
September 2024
Reproductive Health Research Centre, National Research Institute for Family Planning, Beijing, China.
Article Synopsis
- * The study analyzes microbial diversity in the semen of healthy males using specific genomic techniques, correlating microbial presence with semen parameters and changes after freezing.
- * Findings reveal that certain microbial species are associated with semen quality, affecting sperm concentration and recovery rates after freezing, suggesting that these microbes play a significant role in male fertility.
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