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Pressure tolerance of oceanic flagellates: implications for remineralization of organic matter
Turley, C.M.; Carstens, M. (1991). Pressure tolerance of oceanic flagellates: implications for remineralization of organic matter. Deep-Sea Res. Pt. A: Oceanogr. Res. Pap. A: Oceanogr. Res. Pap 38(4): 403-413
In: Deep Sea Research, Part A. Oceanographic Research Papers. Pergamon Press: Oxford. ISSN 0198-0149, more
Peer reviewed article  

Available in Authors 

Keywords
    Biogeochemistry; Flagellates; High pressure effects; Marine environment; Mineralization; Organic matter; Population dynamics; Pressure effects; Reproduction; Vertical distribution; Marine

Authors  Top 
  • Turley, C.M.
  • Carstens, M.

Abstract
    Active growth of the total mixed flagellate population, comprising three species isolated from the euphotic zone in the northeast Atlantic, occurred up to pressures of 200 atm. (equivalent to 2000 m water depth). At pressures greater than 200 atm. there was a steady decrease in total flagellate numbers. These results could be misinterpreted to conclude that pressures greater than 200 atm. have a deleterious effect on flagellates. When the effects of pressure were investigated at the species level a different picture emerges. One species, Paraphysomonas butcheri, was weakly barotolerant reproducing at up to 100 atm. Another, Bodo curvifilus, had a wide barotolerance dividing at up to pressures of 300 atm., while the third, a Cercomonas -like species, only grew at pressures of 300 atm. and over. Such results indicate the importance of investigations at the species level as well as population level.

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