Figure legends

Figure 1. The study area showing the location of the Takatsuka observatory and the study sites of drainage ditches in the Kita River basin, Fukui Prefecture, Japan. Study sites were classified as three connectivity types, namely “Transient” (red), “Connected” (green), and “Disconnected” (blue).
Figure 2. The time-series water level at the Takatsuka observatory in the Kita River (a) and mean water levels of study sites (b) by three connectivity types, namely “Transient” (red), “Connected” (green), and “Disconnected” (blue). The grey vertical lines indicate the seven survey periods.
Figure 3. Mean ± SE of the relative difference between the first and the focal (n -th) surveys in the abundance of Misgurnus anguillicaudatus (a) and that of all other species (b) by three connectivity types, namely “Transient” (red), “Connected” (green), and “Disconnected” (blue). The relative difference in the abundance between the first and the focal (n -th) surveys at site iis calculated by \(\left(x_{\text{in}}-x_{i1}\right)/\bar{x_{i}}\). The vertical dashed line indicates the timing of the flood event.
Figure 4. Mean ± SE of the temporal turnover of fish species composition based on Bray-Curtis dissimilarity between the (n -1)-th andn -th surveys (\(D_{n-1,n}\)) (a) and between the first and then -th surveys (\(D_{1,n}\)) (b) by three connectivity types, namely “Transient” (red), “Connected” (green), and “Disconnected” (blue). The vertical dashed line indicates the timing of the flood event.
Figure 5. NMDS plot showing the variation of fish community composition across the study sites and the connectivity types to downstream rivers. Each point corresponds to the fish community observed at a survey of a site. Each cross represents fish species, and species names are shown only if they were observed at >15% of surveys. Outlines encompass all the seven points or surveys for each site. Colors represent three connectivity types, namely “Transient” (red), “Connected” (green), and “Disconnected” (blue).