Young volcanic terrains are windows into early microbial colonization

Hadland, Nathan; Hamilton, Christopher W.; Duhamel, Solange

doi:10.1038/s43247-024-01280-3

Cited by 6 publications

(2 citation statements)

References 242 publications

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“…This could be supported if the geological (volcanic) features of the studied area were considered. This means that the porous substrates with submerged volcanic tubes could be the pioneers of microbial colonisation, explaining biofilm formation and bacteria anchoring in sediments [ 70 , 71 ]. Naturalised enterococci could create biofilms and thus proliferate under a variety of conditions [ 72 ].…”

Section: Discussionmentioning

confidence: 99%

Development of Multiplex RT qPCR Assays for Simultaneous Detection and Quantification of Faecal Indicator Bacteria in Bathing Recreational Waters

Carrasco-Acosta,

Garcia-Jimenez

2024

Microorganisms

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In this study, we designed and validated in silico and experimentally a rapid, sensitive, and specific multiplex RT qPCR for the detection and quantification of faecal indicator bacteria (FIB) used as microbiological references in marine bathing water regulations (Escherichia coli and intestinal enterococci). The 16S rRNA gene was used to quantify group-specific enterococci and Escherichia/Shigella and species-specific such as Enterococcus faecalis and E. faecium. Additionally, a ybbW gene encoding allantoin transporter protein was used to detect E. coli. An assessment of marine coastal systems (i.e., marine water and sediment) revealed that intestinal enterococci were the predominant group compared to Escherichia/Shigella. The low contribution of E. faecalis to the intestinal enterococci group was reported. As E. faecalis and E. faecium were reported at low concentrations, it is assumed that other enterococci of faecal origin are contributing to the high gene copy number of this group-specific enterococci. Moreover, low 16S rRNA gene copy numbers with respect to E. faecalis and E. faecium were reported in seawater compared to marine sediment. We conclude that marine sediments can affect the quantification of FIBs included in bathing water regulations. Valuing the quality of the marine coastal system through sediment monitoring is recommended.

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Section: Discussionmentioning

confidence: 99%

Development of Multiplex RT qPCR Assays for Simultaneous Detection and Quantification of Faecal Indicator Bacteria in Bathing Recreational Waters

Carrasco-Acosta,

Garcia-Jimenez

2024

Microorganisms

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“…To assess whether the rover's exploration area may have hosted signs of past life, the science operations team focused efforts on astrobiologically significant targets (Hadland et al 2024). The most compelling target observed during the mission was the dark-toned, fine-grained sediment of the sand sheet.…”

Section: Habitabilitymentioning

confidence: 99%

Comparing Rover and Helicopter Planetary Mission Architectures in a Mars Analog Setting in Iceland

Gwizd,

Stack,

Francis

et al. 2024

Planet. Sci. J.

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The Rover–Aerial Vehicle Exploration Network project field-tested planetary mission operations within a Mars analog environment in Iceland using stand-alone rover and helicopter architectures. Mission planning, implementation, and results are reported for the rover mission and briefly summarized for the helicopter mission. The outcomes of both missions are subsequently compared. Field implementation occurred from 2022 July to August at the Holuhraun lava flow. The rover science operations team executed a 14 sol (Martian day) mission that achieved mission, science, and sampling goals, including the contextualization, acquisition, and planned caching of two eolian and two rock samples. The helicopter science operations team executed a plan of comparable length but emphasized different science goals given long-range flight capabilities and landing limitations. The resolution and targetability of the rover payload enabled more detailed analyses, whereas the helicopter was better able to map flow-scale morphologies. The rover’s exploration was limited by daily mobility duration limits and hazardous terrain, whereas the helicopter’s exploration was constrained by landing site hazards. Resource limitations resulted from lengthier rover drives and data-volume-intensive helicopter imaging surveys. Future missions using combined rover–helicopter architectures should account for each spacecraft’s resource needs and acknowledge system strengths in different geologic settings. Both missions served to establish operations strategies and mission outcomes to be applied to future combined rover and helicopter mission architectures, while the helicopter mission also evaluated strategies and outcomes for future stand-alone airborne missions. Findings in this work are relevant to future missions seeking to optimize strategies for planetary mission operations.

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Mildly explosive eruptions at Martian low-shield volcanoes

Pieterek,

Jones

2024

Commun Earth Environ

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Ongoing acquisition of Martian surface imagery constantly provides new opportunities to reveal previously undiscovered small-scale volcanic landforms, yielding critical insights into volcanic processes, and challenging existing inferences. Here, using the most recent, high-resolution topographical data, we mapped the accumulation of pyroclastic deposits occurring along the margins of several volcanic vents. They share morphological similarities with terrestrial volcanic deposits attributed to low-intensity lava fountaining occurring during mild explosive activity. Our identified, explosive volcanic deposits are associated with late Amazonian volcanic activity in Tharsis. The identification of these very recent (<100 Ma) deposits across the entire Tharsis volcanic province needs reconciling with our current view of the evolution of explosive volcanism on Mars. We contend that these small volume landforms, produced by mildly explosive volcanic activity, need to be considered in models surrounding planet-scale magmatic evolution and atmospheric volatile budgets.

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Young volcanic terrains are windows into early microbial colonization

Cited by 6 publications

References 242 publications

Development of Multiplex RT qPCR Assays for Simultaneous Detection and Quantification of Faecal Indicator Bacteria in Bathing Recreational Waters

Development of Multiplex RT qPCR Assays for Simultaneous Detection and Quantification of Faecal Indicator Bacteria in Bathing Recreational Waters

Comparing Rover and Helicopter Planetary Mission Architectures in a Mars Analog Setting in Iceland

Mildly explosive eruptions at Martian low-shield volcanoes

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