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Groundwater-Driven Evolution of Prebiotic Alkaline Lake Environments.
Life (Basel)
December 2024
Department of Earth, Energy, and Environment, University of Calgary, Calgary, AB T2N 1N4, Canada.
Alkaline lakes are thought to have facilitated prebiotic synthesis reactions on the early Earth because their modern analogs accumulate vital chemical feedstocks such as phosphate through the evaporation of dilute groundwaters. Yet, the conditions required for some building block synthesis reactions are distinct from others, and these conditions are generally incompatible with those permissible for nascent cellular function. However, because current scenarios for prebiotic synthesis have not taken account of the physical processes that drive the chemical evolution of alkaline lakes, the potential for the co-occurrence of both prebiotic synthesis and the origins and early evolution of life in prebiotic alkaline lake environments remains poorly constrained.
View Article and Find Full Text PDF[Determination of 12 halogenated organic pollutants in edible fish by ultra performance liquid chromatography-high resolution mass spectrometry combined with ultrasound-assisted extraction and gel permeation chromatography purification].
Se Pu
January 2025
Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, China.
Halogenated organic pollutants (HOPs) have attracted considerable attention owing to their persistence, bioaccumulation, and toxicity. The development of methods to detect HOPs in fish is challenging owing to the compositional complexity of fish matrices, which contain high levels of lipids and relatively low concentrations of HOPs. In addition, the lipophilicity of most HOPs renders their extraction difficult.
View Article and Find Full Text PDFEcology and biogeochemistry of the microbial underworld in two sister soda lakes.
Environ Microbiome
November 2024
Department of Biological Sciences, University of Calgary, 2500 University Drive, Calgary, AB, T2N 1N4, Canada.
Background: Approximately 3.7 billion years ago, microbial life may have emerged in phosphate-rich salty ponds. Surprisingly, analogs of these environments are present in alkaline lake systems, recognized as highly productive biological ecosystems.
View Article and Find Full Text PDFVery low sulfur fuel oil spilled from the MV Wakashio in 2020 remains in sediments in a Mauritius mangrove ecosystem nearly three years after the grounding.
Mar Pollut Bull
December 2024
Western Australian Isotope and Geochemistry Centre, School of Earth and Planetary Sciences, Curtin University, Perth, Western Australia 6102, Australia. Electronic address:
The oil spill resulting from the grounding of the MV Wakashio on a reef off the coast of Mauritius in July 2020 was the world's first major spillage of Very Low Sulfur Fuel Oil (VLSFO) since the implementation of a Global Sulfur Cap from January 2020. In this study, we examine sediments collected in March 2023 from two Mauritius mangrove systems. Analyses by both gas chromatography-mass spectrometry and comprehensive two-dimensional gas chromatography confirmed, by comparison of molecular biomarkers, the presence of Wakashio VLSFO in one of the mangrove systems.
View Article and Find Full Text PDFSpatiotemporal structure and composition of the microbial communities in hypersaline Lake Magadi, Kenya.
F1000Res
November 2024
Department of Biological Sciences, University of Embu, Embu, Kenya.
Article Synopsis
- Soda lakes, like Lake Magadi, have unique microbial communities affected by seasonal changes in water chemistry due to evaporation and flooding.
- * Using 16S rRNA gene sequencing, researchers studied microbial diversity and structure in water and brine samples, finding that bacteria were more diverse and abundant than archaea, with variations across different months.
- * Key factors affecting this diversity included temperature, pH, and various chemical parameters, with salinity and alkalinity identified as major influences on microbial composition.
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