Figure 1From: Interactive effects of chemical and biological controls on food-web composition in saline prairie lakesLocation of the sampling sites in the northern Great Plains of Saskatchewan, with sample sites as open circles and major cities as open squares. Dashed lines indicate long-term isopleths of total precipitation minus total potential evapotranspiration (cm yr-1) [22]. Solid line denotes grassland transition. All lakes are in endorheic drainage basins.Back to article page