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Prokaryotic responses to hydrostatic pressure in the ocean - a review
- Source :
- Environmental Microbiology, Environmental Microbiology, 2013, 15 (5), pp.1262-1274. ⟨10.1111/1462-2920.12084⟩, Environmental Microbiology, Society for Applied Microbiology and Wiley-Blackwell, 2013, 15 (5), pp.1262-1274. ⟨10.1111/1462-2920.12084⟩
- Publication Year :
- 2013
- Publisher :
- HAL CCSD, 2013.
-
Abstract
- International audience; Effects of hydrostatic pressure on pure cultures of prokaryotes have been studied extensively but impacts at the community level in the ocean are less well defined. Here we consider hydrostatic pressure effects on natural communities containing both unadapted (piezosensitive) prokaryotes originating from surface water and adapted (including piezophilic) prokaryotes from the deep sea. Results from experiments mimicking pressure changes experienced by particle-associated prokaryotes during their descent through the water column show that rates of degradation of organic matter (OM) by surface-originating microorganisms decrease with sinking. Analysis of a much larger data set shows that, under stratified conditions, deep-sea communities adapt to in situ conditions of high pressure, low temperature and low OM. Measurements made using decompressed samples and atmospheric pressure thus underestimate in situ activity. Exceptions leading to overestimates can be attributed to deep mixing events, large influxes of surface particles, or provision of excessive OM during experimentation. The sediment-water interface, where sinking particles accumulate, will be populated by a mixture of piezosensitive, piezotolerant and piezophilic prokaryotes, with piezophilic activity prevailing deeper within sediment. A schematic representation of how pressure shapes prokaryotic communities in the ocean is provided, allowing a reasonably accurate interpretation of the available activity measurements.
- Subjects :
- [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere
Aquatic Organisms
Prokaryotic Cells
Oceans and Seas
[SDE.MCG]Environmental Sciences/Global Changes
Hydrostatic Pressure
Temperature
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
Water Microbiology
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography
Subjects
Details
- Language :
- English
- ISSN :
- 14622912 and 14622920
- Database :
- OpenAIRE
- Journal :
- Environmental Microbiology, Environmental Microbiology, 2013, 15 (5), pp.1262-1274. ⟨10.1111/1462-2920.12084⟩, Environmental Microbiology, Society for Applied Microbiology and Wiley-Blackwell, 2013, 15 (5), pp.1262-1274. ⟨10.1111/1462-2920.12084⟩
- Accession number :
- edsair.pmid.dedup....d03f4d90bb5065a8cd35bf77e9398d71