Figure captions:
Supplementary Figure 1. Number of studies based on the search terms from Web of Science (Supplementary Text 1), grouped by the type of isolating barrier. Black bars indicate the total number of studies, and grey bars are the studies relevant to Daphnia speciation. Pie chart indicating the number of relevant studies in Daphniaspeciation, grouped by studies of geographic (dark grey), ecological (black), and non-ecological (light grey) isolation.