Figure 1.

A. Lake Baikal position in Eurasia, B. Sampling sites in Lake Baikal. For each sample, the first number and letter indicates the number within one of the basins (S—Southern, C—Central, N—Northern basins), the second letter indicates coastal (C; up to 40 m depth) or deepwater (D; more than 100 m depth) sites, and numbers within brackets indicate the sample depth (e.g., 1CD (1, 15, 50) means of samples from 1, 15, and 50 m depths that were taken in the first site of the Central basin at a deep site. No depth is shown for the coastal samples.