The Upstream Policy Gap: Synthesising Hydrological Science into Conservation Action for Poyang Lake’s Migratory Bird Sanctuary

Figure 1: The geographical position of China’s Poyang Lake (a) and its landscape pattern in dry and winter seasons (b, c) (Adapted from Wang et al, 2019; authors reproduced the figure).
Figure 2: Flocks of migratory waterbirds, including Siberian Cranes (Grus leucogeranus), at Poyang Lake. The sanctuary's capacity to support such congregations is critically dependent on winter food resources governed by upstream hydrological connectivity. (Source: Authors)
Figure 3: PRISMA flow diagram illustrating the systematic review process for evidence identification, screening, and inclusion.
Figure 4: Convergence of Ganjiang River. (Source: Authors)
Figure 5: Annual runoff, baseflow and BFI of Ganjiang Basin. (Source: Deng et al., 2025; authors reproduced the figure)
Figure 6: Water management scenario in Ganjiang River (a) and the impact of climate change, anthropogenic activities, and their combined and synergistic effects on the alterations in hydrological regimes at the three stations of the Gan River (b). (Source: Y.H. Huang et al., 2024; authors reproduced the figure)