fig1

Figure 1. Distribution of water masses within Lake Saint-Pierre (Quebec, Canada) and the stations visited in 2023. Out of the 14 stations sampled, nine were located in the lake’s archipelago area (stations A1 to A9), three on the south shore (stations S1, S2, and S3), and two on the north shore (stations N1 and N2). Nine stations (A1 to A4, A6, A8, A9, N1, and N2) were located in the northern water body, three (A5, A7, and S1) in the central water body and two (S2 and S3) in the southern water body.