Abstract
The seasonal distribution of Cladocera and Copepoda in the Holon Rainpool near Tel-Aviv, Israel, was studied. Plankton was also collected from 16 other rainpools along the coastal plain of Israel and compared with the plankton of the Holon Pool. Environmental factors, such as water depth, temperature, dissolved oxygen, pH and alkalinity were recorded weekly at the Holon Pool. The interaction of temperature and water depth is discussed; a temporary thermal stratification occurs in this shallow rainpool. Daily as well as seasonal fluctuations in temperature, pH, dissolved oxygen and alkalinity are described and discussed. A positive correlation was found between total alkalinity and the density of Diaptomus wierzejskii. The succession of species during two seasons is described, and appears to be fairly constant. New localities for Alona elegans, Hemidiaptomus gurneyi and Acanthocyclops bicuspidatus are recorded.
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