hypersaline lake Archives - Astrobiology

Main categories of extremophiles. This illustration depicts the 10 most common extremophile types, highlighting their defining physicochemical stressors and representative natural environments. -- Briefings in Bioinformatics

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Decoding Extremophiles: Insights From Bioinformatics, Machine Learning, And Data-driven Approaches

by Keith CowingMay 22, 2026May 23, 2026

Life thrives in Earth’s most inhospitable environments, from boiling hydrothermal vents to hypersaline lakes and frozen polar deserts, thanks to the remarkable adaptations of extremophilic microorganisms.

Major iongeochemistry of lakewater. Ternary diagrams of the molar fraction of the 253major cations (left) and major anions (right). -- eartharxiv.org

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Production and Preservation of Lipid Biosignatures in SO4-Rich Hypersaline Lakes of the Cariboo Plateau

by Keith CowingOctober 7, 2025October 7, 2025

Modern and ancient hypersaline lakes and oceans have been identified across the solar system, but the habitability and potential of these environments to preserve organic matter remain unknown.

Micrographs of fresh (a) and 6 day old (b) SD1T cells stained with acridine orange at 1000x magnification (500 nm Ex./526 nm Em.). Bright spots (a) were common among cells. Terminal spores shown in panel B were common in older or nutrient-limited cultures. Scale bars are 5 µm. -- International Journal of Systematic and Evolutionary Microbiology via PubMed

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Dethiothermospora halolimnae gen. nov., sp. nov., A Novel Moderately Halophilic, Thermotolerant, Bacterium Isolated From A Brine Lake

by Keith CowingMay 4, 2025May 4, 2025

A novel, strictly anaerobic, slightly alkaliphilic, halotolerant, peptide- and amino acid-utilizing bacterial strain, SD1T, was isolated from a hypersaline lake in Western Australia.

Panel a: spatial distribution of 95th percentile values of ice contingency (at depth >5 m; light blue shaded area) and of Th concentration (yellow shaded area labeled with capital letters). Dashed red rectangles delimit the most seismically active regions according to the InSight mission (Ceylan et al., 2023). Panel b: intersection of the two previous maps. Yellow and red shaded areas (labeled with A and B) show the regions where values of both the 95th percentile and 99th percentile of Cv(5, long,lat) and [Th](long,lat) coincide. The faint white dots show the spatial distribution of pitted cones structures (modified from Mills et al., 2024). The black dots show the spatial distribution of candidate and confirmed SRLs according to Mcewen et al., (2021); Stilmann et al., (2016), and Oijha et al., (2014). The red dot shows the McLaughlin Crater with exposed carbonate rocks and signs of groundwater activity (Michalski et al., 2013). Gray in the background shows the Mars topography based on MOLA -- astro-ph.E

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Potential Habitability of Present-day Mars Subsurface for Terrestrial-like Methanogens

by Keith CowingNovember 25, 2024November 25, 2024

The intense debate about the presence of methane in the Martian atmosphere has stimulated the study of methanogens adapted to terrestrial habitats that mimic Martian environments.

iss071e414494 (Aug. 2, 2024) -- The rich red saltwater of Lake Urmia is pictured from the International Space Station as it orbited 260 miles above. Over the past few decades, the lake has shrunk, causing higher salt concentrations in the water, resulting in microscopic organisms turning the water shades of red and orange. Date Created:2024-08-02 larger image

Biosignatures & Paleobiology, Extremeophiles and Extreme Environments, Habitable Zones, Imaging & Spectroscopy, Microbiology & Virology, Space Stations, Status Report

Orbital Biosignature Survey Of Lake Urmia

by Keith CowingAugust 23, 2024

According to NASA: Like the Aral Sea, Iran’s salty Lake Urmia has shrunk rapidly during the past few decades. As it grows smaller, the lake grows saltier. And as it […]

Microbial composition and genetic characteristics of four saline lakes. a, Alpha indices of predicted genes from lakewater and sedimentary communities in different lakes. Red: ADH (Aiding Lake), blue: BLK (Barkol Lake), green: DBC (Dabancheng Lake), purple: QJJ (Qijiaojing Lake). Asterisks indicate statistical significance (P < 0.05). NS: No statistical significance (P > 0.05). b, Distance-based Redundancy Analysis (dbRDA) of predicted genes from lakewater and sedimentary communities in different lakes. TOC: Total Organic Carbon, Li+: lithium, Na+: sodium, NH4+: ammonium, K+: potassium, Mg2+: magnesium, Ca2+: calcium, Cl−: chloridion, SO42−: sulphate. c, Relative abundance of genes involved in key pathways, including carbon fixation, fatty acid metabolism, methane metabolism, nitrogen metabolism, photosynthesis, and sulfur metabolism. d, Z-score normalised relative abundance of modules in carbon fixation, methane, nitrogen, and sulfur metabolism. CREDIT Environmental Science and Ecotechnology / Science Direct

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Microbial Wonders In Earth’s Saltiest Waters

by Keith CowingFebruary 2, 2024February 2, 2024

The study delves into hypersaline lakes in Xinjiang, China, exploring the genetic and metabolic diversity of microbial communities termed “microbial dark matters”.