Abstract
SHORTLY after dawn on July 1, 1948, the weather being fine asnd calm, 100 millicuries of radioactive phosphorus(P32) was added to the surface of an acid bog lake of area 0·3 hectare (0·8 acre) and depth 6 metres, situated near Halifax, Nova Scotia. The runoff was small and the margin almost wholly surroxmded by sphagnum. The lake had a well-developed zone of cold, stagnant water at the bottonymth a thermocline above. Oxygen reached two-tkirds saturation at the surface, was scarce at three metres depth, and absent at five metres. The only native fish observed were Fundulus diaphanus and Notemigonus crysoleucas. Before the experiment, some four thousand Fundulus were added to the lake for later sampling.
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GOFFIN, C., HAYES, F., JODREY, L. et al. Exchange of Materials in an Lake as Studied by Radioactive Phosphorus. Nature 163, 963–964 (1949). https://doi.org/10.1038/163963a0
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DOI: https://doi.org/10.1038/163963a0