Study area in southern Taiwan, including the Puzi, Bazhang, Jihsui, Tsengwen, Yanshui, Linbian, Donggang, Fenggang, Fangshan, Gaoping, Erren, and Agongdian Rivers and the Shihchung, Paoli, and Gangkou streams, with 40 river sampling points. Map created via Paint 2, version 5.3.1 (250) (TryBest Studio), using data from the Taiwan National Land Surveying and Mapping Center.