Active biological participation in lacustrine barium chemistry

Details Active biological participation in lacustrine barium chemistry Active biological participation in lacustrine barium chemistry

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983gecoa..47.1325f&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 47, Issue 7, pp.1325-1329

Mathematics

Logic

3

Scientific paper

Freshwater Protozoa belonging to the genus Loxodes accumulate barium sulphate as discrete, intracellular, spherical granules. These organisms may be extremely abundant ( 0.8 × 10 6 /1) in biologically productive lakes. In two such lakes a sharp peak in the concentration of particulate barium was observed in the region of the oxycline. In both cases this coincided with a peak in the abundance of Loxodes but not with an elevated concentration of particulate iron, also suggested to concentrate Ba by physical-chemical mechanisms. A relatively constant proportion of the total paniculate Ba over a concentration range of three orders of magnitude could be accounted for by accumulation in Loxodes . Certain Protozoa clearly play an important role in the biogeochemical cycle of barium in freshwaters.

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