Fig. 1: Sampling locations and environmental profiles in Lake Tanganyika.

A Map of sampling locations in LT. The inset figure shows the approximate location of LT in a spherical global projection. Lakes and rivers are identified in blue; cities are shown in black. Rivers, lakes, and populous cities are labeled. The locations of the 24 samples collected are labeled, corresponding to Kigoma (red) or Mahale (blue), which are stations in Lake Tanganyika. The white shaded box represents location for which we collected depth-discrete samples (cast). B Sampling locations along the vertical transect of LT. Samples are depicted foremost by location (Kigoma vs. Mahale), followed by sampling date on the x-axis and depth on the y-axis. Short sample names are written next to each dot. C Dissolved oxygen (% saturation) in Lake Tanganyika, in percentage of saturation, from 2010 to 2013. D Temperature profiles, in degree Celsius, from 2010 to 2013 in Lake Tanganyika (Color figure online).