Prokaryotic responses to hydrostatic pressure in the ocean – a review

Tamburini, Christian; Boutrif, Mehdi; Garel, Marc; Colwell, Rita R.; Deming, Jody W.

doi:10.1111/1462-2920.12084

Cited by 134 publications

(143 citation statements)

References 91 publications

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“…All our mesopelagic and bathypelagic samples were decompressed prior to measuring PHP. Whether, decompression of deep sea samples lead to an increased or decreased prokaryotic activity is still a major unknown (Tamburini et al, 2013). In order to estimate the effect of decompression on the E a we subdivided our mesopelagic and bathypelagic data into two depth intervals and found that the apparent E a values were constant between these depth layers (Supplementary Figure S4).…”

Section: Other Factors Affecting the Prokaryote Production To Temperamentioning

confidence: 99%

Depth Dependent Relationships between Temperature and Ocean Heterotrophic Prokaryotic Production

et al. 2016

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Marine prokaryotes play a key role in cycling of organic matter and nutrients in the ocean. Using a unique dataset (>14,500 samples), we applied a space-for-time substitution analysis to assess the temperature dependence of prokaryotic heterotrophic production (PHP) in epi-(0-200 m), meso-(201-1000 m) and bathypelagic waters (1001-4000 m) of the global ocean. Here, we show that the temperature dependence of PHP is fundamentally different between these major oceanic depth layers, with an estimated ecosystem-level activation energy (E ) of 36 ± 7 kJ mol −1 for the epipelagic, 72 ± a 15 kJ mol −1 for the mesopelagic and 274 ± 65 kJ mol −1 for the bathypelagic realm. We suggest that the increasing temperature dependence with depth is related to the parallel vertical gradient in the proportion of recalcitrant organic compounds. These E a predict an increased PHP of about 5, 12, and 55% in the epi-, meso-, and bathypelagic ocean, respectively, in response to a water temperature increase by 1 • C. Hence, there is indication that a major thus far underestimated feedback mechanism exists between future bathypelagic ocean warming and heterotrophic prokaryotic activity.

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Section: Other Factors Affecting the Prokaryote Production To Temperamentioning

confidence: 99%

Depth Dependent Relationships between Temperature and Ocean Heterotrophic Prokaryotic Production

et al. 2016

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“…Water samples were taken in a total of three dives of the remotely operated vehicle (ROV) ABISMO at the same station (11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22).25′N, 142-42.75′E) on the Challenger Deep. The temperature and salinity profiles were Significance Although many microbial explorations for hadal sediments began in the 1950s, the hadal water is the least-explored microbial biosphere.…”

Section: Resultsmentioning

confidence: 99%

“…The microbiological and geochemical investigations of hadal waters have been limited (10), in contrast to the long history of hadal benthic microbiological studies occurring since the 1950s (11). To date, many piezophiles and piezotolerant bacteria have been isolated from hadal benthic habitats, and their phenotypical and genomic features have been characterized to be distinct from those of the close relatives obtained from shallow marine environments (12). As one of the major biogeochemical traits, a significantly higher microbial carbon turnover rate has been identified in hadal sediments than that in adjacent abyssal plain sediments (13).…”

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confidence: 99%

Hadal biosphere: Insight into the microbial ecosystem in the deepest ocean on Earth

Nunoura

Takaki

Hirai

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

260

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Hadal oceans at water depths below 6,000 m are the least-explored aquatic biosphere. The Challenger Deep, located in the western equatorial Pacific, with a water depth of ∼11 km, is the deepest ocean on Earth. Microbial communities associated with waters from the sea surface to the trench bottom (0 ∼10,257 m) in the Challenger Deep were analyzed, and unprecedented trench microbial communities were identified in the hadal waters (6,000 ∼10,257 m) that were distinct from the abyssal microbial communities. The potentially chemolithotrophic populations were less abundant in the hadal water than those in the upper abyssal waters. The emerging members of chemolithotrophic nitrifiers in the hadal water that likely adapt to the higher flux of electron donors were also different from those in the abyssal waters that adapt to the lower flux of electron donors. Species-level niche separation in most of the dominant taxa was also found between the hadal and abyssal microbial communities. Considering the geomorphology and the isolated hydrotopographical nature of the Mariana Trench, we hypothesized that the distinct hadal microbial ecosystem was driven by the endogenous recycling of organic matter in the hadal waters associated with the trench geomorphology.hadal | trench | niche separation | nitrification | Challenger Deep

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“…Layers bathy (1000-4000 m depth), abyssopelagic (4000-6000 m depth) and hadal environments (N 6000 m depth), form a physically uniform entity characterized by slightly elevated amount of inorganic nitrogen, absence of solar radiation, high hydrostatic pressure (up to 110 MPa), extreme oligotrophy and low temperature (2-3°C), except for the warm Mediterranean, Red, and Sulu Seas (Bartlett, 1992;Tamburini et al, 2013). The food web was supposed to be exclusively dependent on the flux of sinking particulate organic carbon (POC) and semi-labile dissolved organic carbon (DOC) produced by phytoplankton and other epipelagic heterotrophic organisms Hansell et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of deep-sea bacterioplankton OMICS revealed the occurrence of habitat-specific genomic attributes

et al. 2014

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Bathyal aphotic ocean represents the largest biotope on our planet, which sustains highly diverse but low-density microbial communities, with yet untapped genomic attributes, potentially useful for discovery of new biomolecules, industrial enzymes and pathways. In the last two decades, culture-independent approaches of high-throughput sequencing have provided new insights into structure and function of marine bacterioplankton, leading to unprecedented opportunities to accurately characterize microbial communities and their interactions with the environments. In the present review we focused on the analysis of relatively few deep-sea OMICS studies, completed thus far, to find the specific genomic patterns determining the lifeway and adaptation mechanisms of prokaryotes thriving in the dark deep ocean below the depth of 1000m. Phylogenomic and omic studies provided clear evidence that the bathyal microbial communities are distinct from the epipelagic counterparts and, along with generally larger genomes, possess their own habitat-specific genomic attributes. The high abundance in the deep ocean OMICS of the systems for environmental sensing, signal transduction and metabolic versatility as compared to the epipelagic counterparts is thought to enable the deep-sea bacterioplankton to rapidly adapt to changing environmental conditions associated with resource scarcity and high diversity of energy and carbon substrates in the bathyal biotopes. Together with a versatile heterotrophy, mixotrophy and anaplerosis are thought to enable the deep-sea bacterioplankton to cope with these environmental conditions.

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Prokaryotic responses to hydrostatic pressure in the ocean – a review

Cited by 134 publications

References 91 publications

Depth Dependent Relationships between Temperature and Ocean Heterotrophic Prokaryotic Production

Depth Dependent Relationships between Temperature and Ocean Heterotrophic Prokaryotic Production

Hadal biosphere: Insight into the microbial ecosystem in the deepest ocean on Earth

Comparative analysis of deep-sea bacterioplankton OMICS revealed the occurrence of habitat-specific genomic attributes

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