Variations of Dissolved Organic Copper in Marine Waters
Dissolved organic copper was isolated from large amounts of seawater during two experiments, one in open Baltic waters during an anchor station in May 1980, and the second in July 1980 at Saanich Inlet (Canada) using a controlled ecosystem enclosure (CEE). Samples, taken in intervals between 4 and 24 h, showed average organic copper fractions in the range of about 5% of total copper. Diurnal fluctuations could be detected in Baltic waters, with minimum and maximum Cu values of around 1 and 0.3 nmol l−1, respectively. Short-term variations of organic copper were also evident in the CEE experiment with a range of 0.5 to 3 nmol l−1. The results strongly indicate the release of copper-organic substances (or complexing agents) by primary producers and short-term variations due to microbial activity.
KeywordsDissolve Organic Matter Marine Water Dissolve Organic Material Organic Copper Skeletonema Costatum
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