Document Type : Review paper
Hypersaline environments are essential, integral and dynamic part of the biosphere. Their management and protection depend on an understanding of the influence of salinity on biological productivity and community structure. The aim of this study was to review the relationships between the two basic biological components of hypersaline environments (micro-algae and Artemia) to provide a better understanding the dynamics of these unique ecosystems. Algal composition as the main food source of Artemia determines Artemia growth, reproduction rates, brood size, density, lipid index and cysts yields. Furthermore, the reproduction mode of Artemia depends on food levels, so that at the low food levels the main reproduction going into cysts. On the other hand, seasonal fluctu-ations of algal abundance influence Artemia population in temperate large hypersaline lakes such as the Great Salt Lake (USA), Urmia Lake (Iran) and Mono Lake (USA). However, Artemia grazing pressure has significant effects on microalgal density.