River animals just go with the flow

Interesting floodplain dynamics were observed during and after seasonal flooding in northern Japan. The combination of the natural flow patterns of rivers and the complex geomorphology of the floodplain supported diverse aquatic biota there. Intensive fieldwork and a 2019 flood-recession survey yielded data in flow dynamics, water chemistry, and animal responses in the floodplain.The team’s findings reveal that seasonal changes cause extensive floods as well as the expansion and contraction of river channels. The observed spatial and temporal changes to aquatic habitats give rise to distinct responses and adaptations by a diverse range of animals.