Figure 1

source geographic information system (GIS) software QGIS version 3.10 (https://qgis.org).
Map of Switzerland showing surface waters, sampling locations, and sites of strain isolation. The map was created using the open

source geographic information system (GIS) software QGIS version 3.10 (https://qgis.org).
Map of Switzerland showing surface waters, sampling locations, and sites of strain isolation. The map was created using the open