Generation of particulate iron and DOC consumption by heterotrophic iron oxidation bacteria in spring waters.
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概要
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In the Chita Peninsula of Aichi Pref., there are mainly spring waters (red water) and an abundance of red mud produced around the circumference of spring water on the banks of the Uno-ike Pond. An investigation of this spring water (140 cm maximum depth, 1998-1999) revealed that the minimal value of dissolved organic carbon (DOC) appeared at a depth at which it rapidly decreased to 2 mg L<SUP>-1</SUP> or less in vertical distribution of dissolved oxygen. The maximal value of particulate iron (PFe) also appeared in the same layer. Abundant of Leptothrix sp., heterotrophic iron oxidation bacteria observed under microscopic examination, were found in the DOC mininum layer. By a laboratory experiment using this water, the generation of PFe was confirmed to correspond to the decrease in the dissolved iron (DFe) . It was also possible to clearly observe DOC consumption. These observations were also carried out in the red spring waters of Aichi Pref. In the culture experiments, particulate iron production per day (0.61 ng CFU<SUP>-1</SUP> d<SUP>-1</SUP>) was measured, and we obtained a heterotrophic iron oxidation bacterium (KK-2: isolated from the Koogetsuin where red water appeared in spring and summer).
- 日本陸水学会の論文
日本陸水学会 | 論文
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