Ecohydrology as a field of research is expanding rapidly and in the process is displacing boundaries of consolidated disciplines. Some of the fundamental challenges involve understanding the complex patterns, interactions and feedbacks between water and ecosystems. Addressing these challenging problems is critical, e.g. to understand the hydrological and ecosystem responses and resilience to environmental change and hydrological extremes, resistance and resilience. This is of particular importance to sensitive areas, such as at hydrological interfaces (e.g. at the boundaries between terrestrial and aquatic ecosystems). Recent years have seen considerable developments in hydrological and ecological field observation, analyses and other sensing methods. They have offered new ‘spectacles’ for observing ecohydrological systems, leading to new insights into their functioning and interactions. This session aims to assess the new developments in our understanding of ecohydrological systems and their interfaces. It draws examples from the wide field of ecohydrology in order to portray the current diversity and common features of research frontiers in ecohydrological studies. Contributions include those that explicitly couple ecological and hydrological processes; explore the latest developments in methods for ecohydrological system understanding; consider modelling combinations and new measurement technologies; provide new ecohydrological interpretations in terms of ecosystem structure, function and feedback responses; and explore these at sensitive areas including hydrological interfaces.