Paul is an ecohydrologist with research interests focussing on the response of instream organisms to natural and anthropogenic disturbances (including drought, sedimentation, pollution and invasive species) over a range of spatial and temporal scales.
His research examines how riverine communities respond to natural environmental variability (floods and drought) and disturbances (such channel management, sedimentation and the introduction of invasive species). He has a longstanding interest in how hydrological variability influences the ecology of groundwater dominated chalk and limestone streams, springs and sub-surface ecosystems. His research draws together elements of hydrology, ecology, geomorphology, in combination with management practices to support the conservation of freshwater ecosystems including anthropogenic ponds and ditches. His research has been supported by a variety of funders including NERC, Environment Agency, Natural England, Centre for Ecology and Hydrology and Nuffield Foundation.