الفهرس 
AcknowledgmentOnly 14 pages are availabe for public view
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Abstract
Algae living in intertidal environment frequently experience changes in external salinity. These may be caused by dilution factors such as rainfall and by the concentrating effects of evaporation. These changes may be cyclical or irregular. Diurnal and lunar cycles are due to mainly to tidal effects but seasonal cycles are perhaps more aften related to terrestrial climatic changes. Algae growing in such conditions must therefore have a measurable degree of tolerence to changes in the salinity of their bathing medium.