Prokaryotic responses to hydrostatic pressure in the ocean – a review

摘要: Effects of hydrostatic pressure on pure cultures prokaryotes have been studied extensively but impacts at the community level in ocean are less well defined. Here we consider effects natural communities containing both unadapted (piezosensitive) originating from surface water and adapted (including piezophilic) deep sea. Results experiments mimicking changes experienced by particle-associated during their descent through column show that rates degradation organic matter (OM) surface-originating microorganisms decrease with sinking. Analysis a much larger data set shows that, under stratified conditions, deep-sea adapt to situ conditions high pressure, low temperature OM. Measurements made using decompressed samples atmospheric thus underestimate activity. Exceptions leading overestimates can be attributed mixing events, large influxes particles, or provision excessive OM experimentation. The sediment-water interface, where sinking particles accumulate, will populated mixture piezosensitive, piezotolerant piezophilic prokaryotes, activity prevailing deeper within sediment. A schematic representation how shapes prokaryotic is provided, allowing reasonably accurate interpretation available measurements.