An Updated View of the Microbial Diversity in Deep Hypersaline Anoxic Basins

Mapelli, Francesca; Barozzi, Alan; Michoud, Grégoire; Merlino, Giuseppe; Crotti, Elena; Borin, Sara; Daffonchio, Daniele

doi:10.1007/978-3-319-48327-6_2

Cited by 7 publications

(5 citation statements)

References 59 publications

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“…DG devised the topic, supervised paper structure and data collection, conducted literature search, created figures and wrote the paper. et al, 1977;Kavak and Karadogan, 2012;Pontefract et al, 2017;Tambekar et al, 2010 Terrestrial hot springs/geothermal waters 15 -270 0.02 -9.8 0.1 -7.2 b 0.0002saturation Chan et al, 2017;Delmelle and Bernard, 1994;Namsaraev et al, 2003;Qi et al, 2017;Taran, 2009 Polar environments -98.6 -24.3 4.6 -9.6 0.1 -35.5 c 0 -40.2 Aislabie et al, 2006;Dickson et al, 2013;Samarkin et al, 2010;Scambos et al, 2018;Siegert et al, 2001 Deep-sea floor and trenches -1.9 -13.8 d 7.3 -8.1 2.1 -112 3.4 -3.9 Danovaro et al, 2010;Emeis et al, 1996;Mantyla and Reid, 1983 Deep-sea hydrothermal vents < 1 e -464 4 -11 2.1 -50.7 0.1 -8 Konn et al, 2009;Koschinsky et al, 2008;McDermott et al, 2018 Deep hypersaline anoxic basins 10 -65 5.4 -8.6 2.1 -40.5 4 -50 f Karbe, 1986;Mapelli et al, 2017;Merlino et al, 2018;Yakimov et al, 2013Yakimov et al, , 2015 Subsurface ecosystems 3.25 -< 400 g~1 -12.8 < 800 h 0.05 -saturation i Becker et al, 1984;Frank et al, 2016;Lechmann et al, 2014;Prieto et al, 2017;Roadcap et al, 2006;Waldron et al, 2007 Deserts j -19.4 -70 6.8 -10 nr 0.02 -30.8 Dion et al, 2008;…”

Section: Future Directions and Outlookmentioning

confidence: 99%

Living at the Extremes: Extremophiles and the Limits of Life in a Planetary Context

Merino¹,

Aronson²,

Bojanova³

et al. 2019

Preprint

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Prokaryotic life has dominated most of the evolutionary history of our planet, evolving tooccupy virtually all available environmental niches. Extremophiles, especially those thrivingunder multiple extremes, represent a key area of research for multiple disciplines, spanningfrom the study of adaptations to harsh conditions, to the biogeochemical cycling of elements.Extremophile research also has implications for origin of life studies and the search for life onother planetary and celestial bodies. In this article, we will review the current state ofknowledge for the biospace in which life operates on Earth and will discuss it in a planetarycontext, highlighting knowledge gaps and areas of opportunity.

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Section: Future Directions and Outlookmentioning

confidence: 99%

Living at the Extremes: Extremophiles and the Limits of Life in a Planetary Context

Merino¹,

Aronson²,

Bojanova³

et al. 2019

Preprint

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“…The complex structure and conditions of the DHABs, such as the presence of the steep haloand oxyclines, have been found to influence the distribution, structure, and richness of the microbial communities living in these environments [19]. Many studies have been focused on the halocline, which entraps nutrients, sinking organic materials, minerals, and microbial cells, and creates environmental gradients of great interest not only for identifying and isolating novel organisms but also for clarifying their metabolic strategies employed for adapting to extreme conditions [19]. The variable accumulation of metals and nutrients, especially in the halocline, supports the presence of different ecological niches exploited by highly diverse microorganisms with peculiar features [38].…”

Section: Gulf Of Mexicomentioning

confidence: 99%

“…To date, with the recent finding of these new DHABs, 35 basins have been discovered around the world. The Bannock, Tyro, Urania, L'Atalante, and Discovery basins are the deepest known DHABs, being far below the photic zone (3200-3500 m deep), and are located along the Mediterranean Ridge in the Eastern Mediterranean Sea, an accretionary complex subjected to continental collision [19]. Two of the most studied DHABs in the Red Sea are the Shaban and the Kebrit deeps.…”

Section: Introductionmentioning

confidence: 99%

Deep Hypersaline Anoxic Basins as Untapped Reservoir of Polyextremophilic Prokaryotes of Biotechnological Interest

2020

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Deep-sea hypersaline anoxic basins (DHABs) are considered to be among the most extreme ecosystems on our planet, allowing only the life of polyextremophilic organisms. DHABs’ prokaryotes exhibit extraordinary metabolic capabilities, representing a hot topic for microbiologists and biotechnologists. These are a source of enzymes and new secondary metabolites with valuable applications in different biotechnological fields. Here, we review the current knowledge on prokaryotic diversity in DHABs, highlighting the biotechnological applications of identified taxa and isolated species. The discovery of new species and molecules from these ecosystems is expanding our understanding of life limits and is expected to have a strong impact on biotechnological applications.

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“…Anoxic brine pools and saline seeps at the bottom of the ocean with salinities nearly ten times that of seawater are some of the most extreme environments on the modern Earth (Mapelli et al, 2017;Merlino et al, 2018). They are inhabited by a plethora of microorganisms that capitalize on strong gradients in redox conditions and metabolic substrates.…”

Section: Introductionmentioning

confidence: 99%

Deep-marine brine seeps stimulate microbial nitrogen cycling: implications for the formation of sediment-hosted ore deposits

Stueeken,

Long,

Rochelle-Bates

et al. 2024

Preprint

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Deep-marine brine seeps in the modern ocean are considered analogues for settings that favoured the formation of sedimentary-exhalative zinc and lead deposits in deep time. Microbial activity plays an important role in the accumulation of ore minerals, meaning that the extent of mineralization is at least indirectly dependent on nutrient fluxes. Here, we investigated the biogeochemical nitrogen cycle in shallow (15-50 cm) sediment cores from the Orca Basin brine pool and surrounding sites, as well as from an active brine seep area near Dead Crab Lake in the Gulf of Mexico, with the aim of constraining the effect of brine seepage on this bio-essential element. We find high porewater ammonium concentrations in the millimolar range, paired with elevated ratios of organic carbon to nitrogen in sediments, which confirm previous hypotheses that the brine recycles ammonium from sedimentary strata back into the water column. Within Orca Basin, we note tentative evidence of microbial ammonium utilization. At the active seep, ammonium is mixed into the overlying water column and likely undergoes oxidation. Isotopic data from sediments and dissolved ammonium, paired with previously published genomic data, suggest the presence of dissimilatory nitrate reduction to ammonium (DNRA) at the brine-seawater interface. We conclude that brine seeps can stimulate biological nitrogen metabolisms in multiple ways. Our results may help calibrate studies of biogeochemical cycles around brine seeps that are archived in the rock record.

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An Updated View of the Microbial Diversity in Deep Hypersaline Anoxic Basins

Cited by 7 publications

References 59 publications

Living at the Extremes: Extremophiles and the Limits of Life in a Planetary Context

Living at the Extremes: Extremophiles and the Limits of Life in a Planetary Context

Deep Hypersaline Anoxic Basins as Untapped Reservoir of Polyextremophilic Prokaryotes of Biotechnological Interest

Deep-marine brine seeps stimulate microbial nitrogen cycling: implications for the formation of sediment-hosted ore deposits

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