Figure 1.

Study site in the Cuatro Cienegas basin. (a) Geographic location of the study site, indicating the sampling sited within “Laguna Grande” (desiccation lagoon) of the Churince system (modified from [8, 11]). (b) Average water temperature in two sites (LG1 and LG3) of “Laguna Grande.” Temperature was measured hourly over two weeks; average temperatures are significantly higher during summer than winter [17]. Error bars represent standard deviations, white dots and dark dots represent minimum and maximum temperatures, respectively [16].