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Seasonal Changes in the Water and Heleoplankton of Fresh-water Ponds

Published online by Cambridge University Press:  11 May 2009

Extract

The seasonal changes in the heleoplankton of two fresh-water ponds have been compared with alterations in the solutes, and it has been shown that in each there was a vernal rise in pH followed by a period of stagnation with lowered pH. In the quarry pond of Borough Farm, Antony, this condition persisted till the autumn; in Staddon reservoir it was succeeded by a period of high alkalinity, lasting till October. These changes are associated with the spring increase in plankton, and the development of masses of floating algæ in Staddon reservoir; they may be traced in Figs. 1 and 3.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 1925

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