Hydrostatic pressure affects aggregate transformation and organic carbon transport: in and beyond the twilight zone: Experiment December 2010

• Main Authors: Mendes, Pedro André, Thomsen, Laurenz, Gust, Giselher, Moje, Annika
• Format: Dataset
• Language: English
• Published: PANGAEA 2015
• Subjects: Alanine; Amino acid; total hydrolysable; Amino acids; Arginine; Aspartic acid; Aspartic acid/beta-Alanine ratio; beta-Alanine; BIOACID; Biological Impacts of Ocean Acidification; Carbon; inorganic; particulate; organic; total; Carbon/Nitrogen ratio; Dauwe index; Experimental treatment; gamma-Aminobutyric acid; Glutamic acid; Glutamic acid/gamma-Aminobutyric acid ratio; Glycine; Histidine; Isoleucine; Leucine; Lysine; Methionine; Nitrogen; Ornithine; Particle concentration; pH; Phenylalanine; Ratio; Serine; Sinking velocity; Size; Threonine; Time in hours; Tyrosine; Valine; Ocean acidification
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.846494; https://doi.org/10.1594/PANGAEA.846494

This work aimed to explore evaluated the effects of the increased of hydrostatic pressure on a defined bacterial community on aggregates formed from an axenic culture of marine diatoms by simulating sedimentation to the deep sea by increase of hydrostatic pressure up to 30 bar (equivalent to 3000 m water depth) against control at ambient surface pressure. Our hypothesis was that microbial colonization and community composition and thus microbial OM turnover is greatly affected by changes in hydrostatic pressure during sinking to the deep ocean.