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Inland saline waters are threatened worldwide by diversion and pollution of their inflows, introductions of exotic species and economic development of these ecologically valuable habitats. Since 1979 a series of international symposia on inland saline waters has served to strengthen and expand the scope of limnological research on inland saline waters. The seventh conference continued this tradition and the papers derived from the conference focused on the ecology of microbial communities, the influence of habitat geochemistry on biogeography of flora and fauna, physical and geochemical processes, and the conservation of inland saline waters. Of particular note are papers on Walker Lake, Nevada (USA), and the Salton Sea and Mono Lake, California (USA). Continued local, national and international efforts are required to inform the public and decision-makers about the environmental problems faced by saline waters. The papers in this volume will serve this end and should be of interest to aquatic ecologists, limnologists, aquaculturalists, and water resource managers.

Saline Lakes

Preface. Nitrogen limitation and particulate elemental ratios of seston in hypersaline Mono Lake, California, U.S.A.; R. Jellison, J.M. Melack. Nutrient fluxes from upwelling and enhanced turbulence at the top of the pycnocline in Mono Lake, California, S. MacIntyre, J. Jellison. Airborne remote sensing of chlorophyll distributions in Mono Lake, California; J.M. Melack, M. Gastil. Re-appearance of rotifers in hypersaline Mono Lake, California, during a period of rising lake levels and decreasing salinity; R. Jellison, et al. Stratification of microbial assemblages in Mono Lake, California, and response to a mixing event; J.T. Hollibaugh, et al. The bioenergetic basis for the decrease in metabolic diversity at increasing salt concentrations: implications for the functioning of salt lake ecosystems; A. Oren. Comparative metabolic diversity in two solar salterns; C.D. Litchfield, et al. Polar lipids and pigments as biomarkers for the study of the microbial community structure of solar salterns; C.D. Litchfield, A. Oren. Limnological effects of anthropogenic desiccation of a large, saline lake, Walker Lake, Nevada; M.W. Beutel, et al. Oxygen consumption and ammonia accumulation in the hypolimnion of Walker Lake, Nevada; M.W. Beutel. Limnological control of brine shrimp population dynamics and cyst production in the Great Salt Lake, Utah; W.A. Wurstbaugh, Z.M. Gliwicz. International study on Artemia LXIII. Field study on the Artemia urmiana (Günther, 1890) population in Lake Urmiah, Iran; G. Van Stappen, et al. Disperal of Artemia franciscana Kellogg (Crustacea; Anostraca) populations in the coastal saltworks of Rio Grande do Norte, northeastern Brazil; M.R. Camara. Anostracan cysts in California salt lakes; W.D. Shepard, R.E. Hill. Thermal, mixing, and oxygen regimes of theSalton Sea, California, 1997-1999; J.M. Watts, et al. Pleurochrysis pseudoroscoffensis (Prymnesiophyceae) blooms on the surface of the Salton Sea, California; K.M. Reifel, et al. Chattonella marina (Raphidohyceae), a potentially toxic alga in the Salton Sea, California; M.A. Tiffany, et al. Parasites of fish from the Salton Sea, California, U.S.A.; B.I. Kuperman, et al. Gradients of salinity stress, environmental stability and water chemistry as a template for defining habitat types and physiological strategies in inland salt lakes; D.B. Herbst. Thermal tolerance and heat shock proteins in encysted embryos of Artemia from widely different thermal habitats; J.S. Clegg, et al. Land-use influence on stream water quality and diatom communities in Victoria, Australia: a response to secondary salinization; D.W. Blinn, P.C.E. Bailey. A study of the Werewilka Inlet of the saline lake Wyara, Australia &endash; a harbour of biodiversity for a sea of simplicity; B.V. Timms. Demography and habitat use of the Badwater snail (Assiminea infirma), with observations on its conservation status, Death Valley National Park, California, U.S.A.; D.W. Sada. Holocene hydrological and climatic changes in the southern Bolivian Altiplano according to diatom assemblages in paleowetlands; S. Servant-Vildary, et al. Reconnaissance hydrogeochemistry of economic deposits of sodium sulfate (mirabilite) in saline lakes, Saskatchewan, Canada; L.I. Kelley, C. Holmden. Benthos of a seasonally-astatic, saline soda lake in Mexico; J. Alcocer, et al. Phytoplankton dynamics in a deep, tropical, hyposaline lake; Ma.G. Oliva, et al. Food-web structure in two shallow salt lakes in Los Monegros (NE Spain): energetic vs. dynamic constraints; P. Alcorlo, et al. Avian communities in baylands and artificia