Hyperaccumulation of Elements in Marine Organisms

High accumulation of metals by Bryopsis maxima

Species of the genus Bryopsis of Chlorophyceae show a world-wide distribution.
Bryopsis maxima has the highest concentrations of Ba, Ra, Re, Sr, and Tc in marine algae in Japan. In particular, the Re concentration factor was calculated to be 700,000 (on a dry basis) since the Re conc. in seawater is approximately 7 pg/mL.

Sr concs. in the genus Bryopsis are almost equal to Ca concs, although Ca concs. in marine organisms
are usually 10- 100 times higher than Sr concs

A clear relation of Mn to Re in organisms is not observed.

Local structure of Re atom in B. maxima by XAFS

Gamma ray spectra of two green algae from the same location. Clear peaks of Ra-226 and Pb-214 derived from Ra-226, and Ac-228 from Ra-228 are observed for Bryopsis maxima

Click please, if you need more information about
related manuscript, relation between Tc and Re,
microscopy, EPMA, beta ray spectroscopy, ICP-MS, bioaccumulation, and MALDI-TOF/MS.

I think that constituent materials indicating high affinity to Ra, Re, etc. are present in the genus Bryopsis.

XAFS=X-ray absorption fine structure using synchrotron radiation

｜High accumulation of metals by Bryopsis maxima｜High accumulation of vanadium by a fan worm Pseudopotamilla occelata｜
｜ High accumulation of manganese by a giant clam Tridacna squamosa｜
｜High accumulation of manganese by a marine bivalve Cyclosunetta menstrualis｜High accumulaton of iodine by a strawberry conch shell Strombus luhuanus｜
｜ High accumulation of iron by teeth of mollusks｜High accumulation of metals by an octopus Octopus vulgaris｜

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