Landscape connectivity dynamics of the transboundary Mara River catchment, East Africa, and implications for river and wetland response in a globally important conservation region

•Hydrogeomorphic processes drive wetland-catchment connectivity dynamics.•Climatic and anthropogenic features influence landscape connectivity patterns.•The upper catchment region is well-connected and contributes to high runoff and erosion.•Identifying hotspots of catchment connectivity change can inform management.