Ecological Marine Units (EMUs) are the three-way combination of physical variables - depth, sediment grain size, and seabed forms. The breaks in bathymetry and substrate grain size are based on the ecological thresholds revealed by the benthic organism relationships.
Download includes: Bathymetry, Benthic Habitats, Benthic Sediment, Ecological Marine Units, Seabed Forms, and Ecoregional Boundaries.
