Summary
The accumulation of dieldrin by benthic algal communities was studied in laboratory streams. Dieldrin concentrations ranging from 0.05 to 7.0 ppb were maintained in the water of laboratory streams for periods of two to four months. Analyses of algal samples by gas chromatography showed dieldrin concentrations ranging from 0.1 to 200 ppm. These results indicated that increases in concentration up to 30,000 times that of the water had occurred. Quantitative evaluation of species composition revealed that communities dominated by filamentous algae accumulated greater amounts of the insecticide than those in which unicellular diatoms were prevalent.
Zusammenfassung
Dieldrinanreicherung in Algenaufwüchsen in Laboratoriumsströmungen wurde untersucht. Dieldrinkonzentrationen zwischen 0.05 bis 7.0 Teilen/Milliarde wurden zwei bis vier Monate lang im Wasserstrom des Laboratoriums unterhalten. Gaschromatographische Analyse der Algenproben zeigte eine Dieldrinanreicherung zwischen 0.1 und 200 Teilen/Million. Diese Befunde entsprechen einer bis zu 30,000-fachen Konzentrationserhöhung in den Algen im Vergleich zu der Dieldrinkonzentration im Wasser. Quantitative Bewertung verschiedener Algenarten zeigte, daβ Kolonien, die vorwiegend aus filamentförmigen Algen bestanden, mehr Dieldin anreicherten als Kolonien, in denen einzellige Diatomalgen vorherrschten.
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This work is a contribution from the Pacific Cooperative Water Pollution Laboratories, Technical Paper No. 2611, Oregon Agricultural Experiment Station. The investigation was supported in part by research grant ES. 00040 from the Public Health Service.
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Rose, F.L., McIntire, C.D. Accumulation of dieldrin by benthic algae in laboratory streams. Hydrobiologia 35, 481–493 (1970). https://doi.org/10.1007/BF00184572
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DOI: https://doi.org/10.1007/BF00184572