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).