<div style="text-align:justify;"> Background concentrations of Fe, Mn, Cu, Zn, Pb, Cd, and Ni were calculated for brown algae <em>Costaria costata</em> from the northwest Sea of Japan. Also...<div style="text-align:justify;"> Background concentrations of Fe, Mn, Cu, Zn, Pb, Cd, and Ni were calculated for brown algae <em>Costaria costata</em> from the northwest Sea of Japan. Also the paper contains refined data on heavy metal concentrations in the widespread distributed brown algae, such as <em>Stephanocystis crassipes, Sargassum pallidum</em> and <em>S. miyabei</em>. As the upper threshold levels of metal background concentrations, the median values plus double medians of absolute deviations from the medians were used (Me + 2MAD). The lower threshold level of the background concentration equal to the physiological need for an element is the median of 15% minimum values in the sampling minus the double median of absolute deviations from the median (Me<sub>15</sub> - 2MAD<sub>15</sub>). The calculated ranges of the background concentrations of metals in algae were compared with concentrations of elements in mac-rophytes collected from habitats with background concentrations of metals in water. </div>展开更多
文摘<div style="text-align:justify;"> Background concentrations of Fe, Mn, Cu, Zn, Pb, Cd, and Ni were calculated for brown algae <em>Costaria costata</em> from the northwest Sea of Japan. Also the paper contains refined data on heavy metal concentrations in the widespread distributed brown algae, such as <em>Stephanocystis crassipes, Sargassum pallidum</em> and <em>S. miyabei</em>. As the upper threshold levels of metal background concentrations, the median values plus double medians of absolute deviations from the medians were used (Me + 2MAD). The lower threshold level of the background concentration equal to the physiological need for an element is the median of 15% minimum values in the sampling minus the double median of absolute deviations from the median (Me<sub>15</sub> - 2MAD<sub>15</sub>). The calculated ranges of the background concentrations of metals in algae were compared with concentrations of elements in mac-rophytes collected from habitats with background concentrations of metals in water. </div>
