Deep sub-seafloor prokaryotes stimulated at interfaces over geological time

Article Abstract:

A study was conducted to examine the changes in prokaryotic activity, population size, and composition in deep marine sediments from the east Pacific Ocean with deep geochemical or lithological interface. The results suggest that deep sedimentary prokaryotes could have high activity, have changing diversity associated with interfaces, and are active over geological timescales.

Pacific Ocean, Analysis, Genetic aspects, Polymerase chain reaction, Marine sediments

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Prokaryotic cells of the deep sub-seafloor biosphere identified as living bacteria

Article Abstract:

Ribosomal RNA is used as a target for the technique known as catalyzed reporter deposition-fluorescence in situ hybridization (CARD-FISH) to provide direct quantification of live cells as defined by the presence of ribosomes. It is shown that a large fraction of the sub-seafloor prokaryotes is alive, even in old and deep sediments.

Environmental aspects, In situ hybridization, Ribosomal RNA, Sediments (Geology)

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Coral mucus functions as an energy carrier and particle trap in the reef ecosystem

Article Abstract:

Zooxanthellae provide a substantial part of the energy requirement, but corals exude up to half of the carbon assimilated by their zooxanthellae as mucus. It is observed that released coral mucus efficiently traps organic matter from the water column and carries energy and nutrients to the reef lagoon sediment.

Coral reef ecology, Coral reef ecosystems

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