Table 1.

Sampling sites and number of specimens used in the analyses (n)

Site	Stream name	Year	Latitude (WGS84)	Longitude (WGS84)	n
VR12	Ennepe	2013	51.170817	7.495388	25
VR11	Refflingser Bach	2013	51.410751	7.654124	20
QB11	Oester	2013	51.158813	7.752986	20
VR20	Oester	2014	51.155842	7.743871	20
QB27	Schürenbach	2014	51.333002	8.226863	25
QB24	Hengsbecker Bach	2014	51.232291	8.173064	20
QB17	Ilpe	2013	51.235900	8.220648	15
QB23	Ilpe	2014	51.229764	8.247229	15
QB22	Kleine Henne	2014	51.325978	8.327106	25
QB20	Elpe	2014	51.343648	8.424339	20
QB12	Elpe	2013	51.269846	8.446041	15
VR17	Palme	2014	51.240981	8.394280	20
VR6	Palme	2013	51.223222	8.400058	20
VR9	Glenne	2013	51.456734	8.434840	15