UPTAKE AND RELEASE OF DISSOLVED ORGANIC PHOSPHORUS BY REPRESENTATIVES OF A COASTAL MARINE ECOSYSTEM1,2

作者：R. E. Johannes · 发表于：Limnology and Oceanography · 年份：1964 · DOI：10.4319/lo.1964.9.2.0224 · 被引用次数：70 · 研究领域：Environmental Toxicology and Ecotoxicology、Marine Biology and Ecology Research、Wastewater Treatment and Nitrogen Removal

A benthic diatom, a benthic amphipod, and mixed species of marine bacteria were used in studies of the uptake and release of dissolved organic phosphorus (DOP) using the radionuclide P32. Over one‐third of the soluble phosphorus released by the amphipod was in organic form (0.79 µg‐at. DOP/g of animal per hr). Marine bacteria utilized 80% of this DOP. Thirty per cent was hydrolyzed in sterile media, possibly by alkaline phosphatase released by the amphipods. Bacteria‐free diatoms released little DOP during growth, but released 20% of their total phosphorus as DOP after growth had ceased. Growing diatoms could reabsorb 40% of this DOP. Marine bacteria were able to absorb 92% of it. No regeneration of dissolved inorganic phosphate (DIP) from DOP in the presence of bacteria was observed. Marine bacteria, living or dead, released very little DOP.