interdunal

Interdunal is an adjective used in geomorphology and ecology to describe the space between dunes within a dune field. Interdunal zones occur in both coastal and inland desert landscapes and can range from narrow gaps to broad flats bounded by dune ridges. The formation and character of interdunal areas are controlled by aeolian processes: wind moves sand to form dunes and, in the process, creates low-lying spaces that may accumulate sand, moisture, or vegetation depending on local conditions.

In coastal systems, the interdunal zone often lies between beach-facing dunes and inland dunes. These spaces can be dry or moist and may host damp soils, groundwater seepage, or temporary ponds after rainfall. The vegetation and soils in interdunal areas are typically adapted to sandy, well-drained conditions and can include grasses, shrubs, and other salt- or sand-tolerant species. The area provides habitat for a range of organisms, including invertebrates, birds, and reptiles, and can function as a wildlife corridor between dune ridges.

Interdunal zones are sensitive to disturbance because they are narrow and often rely on intact vegetation to stabilize sands and support hydrology. Human activities such as trampling, off-road vehicles, and development can disrupt surface cover, alter moisture regimes, and contribute to dune destabilization. Conservation and management efforts frequently focus on protecting interdunal habitats, restricting access, and restoring native vegetation to maintain natural dune dynamics and ecological integrity.