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Mesoarchean Microbial Cd, Ba, and Ni Cycling: Evidence for Photosynthesis in Pongola Group Stromatolites through Novel Stable Isotopes and High-Resolution Trace Element Maps.
Astrobiology
December 2024
Department of Mineralogy, University of Hannover, Germany.
Nontraditional stable isotopes of bioactive metals emerged as novel proxies for reconstructing the biogeochemical cycling of metals, which serve as cofactors in major metabolic pathways. The fractionation of metal isotopes between ambient fluid and microorganisms is ultimately recorded in authigenic minerals, such as carbonates, which makes them potentially more reliable than standard biomarkers in organic matter. Stromatolitic carbonates are geochemical archives that allow for the study of the long-term interplay of the biosphere, atmosphere, and hydrosphere through deep time, with the unique potential to investigate early life environments and the evolution of the metallome.
View Article and Find Full Text PDFMetals in honey from bees as a proxy for environmental contamination in the United States.
Environ Pollut
January 2025
Sanford School of Public Policy and Duke Global Health Institute, Duke University, Durham, NC, 27708, USA.
This is the first large bio-surveillance study examining the contents and geographic variation of metals of public health concern-arsenic (As), lead (Pb), cadmium (Cd), nickel (Ni), chromium (Cr), and cobalt (Co)-in honey samples collected across the United States. Metal concentrations were measured using ICP-MS, and the spatial distribution pattern of these contaminants was evaluated using statistical and GIS tools. The mean (highest) values (in μg/kg) were 3.
View Article and Find Full Text PDFRevealing Ion Adsorption and Charging Mechanisms in Layered Metal-Organic Framework Supercapacitors with Solid-State Nuclear Magnetic Resonance.
J Am Chem Soc
August 2024
Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom.
Conductive layered metal-organic frameworks (MOFs) have demonstrated promising electrochemical performances as supercapacitor electrode materials. The well-defined chemical structures of these crystalline porous electrodes facilitate structure-performance studies; however, there is a fundamental lack in the molecular-level understanding of charge storage mechanisms in conductive layered MOFs. To address this, we employ solid-state nuclear magnetic resonance (NMR) spectroscopy to study ion adsorption in nickel 2,3,6,7,10,11-hexaiminotriphenylene, Ni(HITP).
View Article and Find Full Text PDFPollution-related changes in nest microbiota: Implications for growth and fledging in three passerine birds.
Environ Pollut
September 2024
Department of Biology, University of Turku, Henrikinkatu 2, 20014, Turku, Finland. Electronic address:
Non-ferrous smelters emit toxic metals into the environment, posing a threat to wildlife health. Despite the acknowledged role of microbes in host health, the impact of such emissions on host-associated microbiota, especially in wild birds, remains largely unexplored. This study investigates the associations of metal pollution, fitness, and nest microbiota (serving as a proxy for early-life microbial environment) which may influence the nestling health and development.
View Article and Find Full Text PDFComparing environmental impacts of deep-seabed and land-based mining: A defensible framework.
Glob Chang Biol
May 2024
Department of Biology/School Earth & Ocean Sciences, University of Victoria, Victoria, British Columbia, Canada.
Article Synopsis
- * Mining for these minerals typically leads to biodiversity loss, prompting the exploration of deep seabed mining as an alternative, despite limited comparative studies on environmental impact between land-based and seabed mining.
- * A new framework called the Environmental Impact Wheel is proposed for assessing mining's ecosystem impacts, incorporating multiple attributes and indicators, with steps to facilitate holistic and targeted environmental comparisons.
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