A number of studies have analyzed how seagrass canopies alter local hydrodynamic conditions and, with that, affect their own productivity, associated biota, sediments, and the water column surrounding them. In contrast, hydrodynamic studies in sea-
grass habitats at the landscape level are less common. While most studies at the canopy level assume that the shoot density is homogenous (Vidono et al., 1997), at the landscape level, it is becoming clear that seagrasses are spatially heterogeneous (Robbins and Bell, 1994). In this section, we address flow-related causes of seagrass heterogeneity and hydrodynamic consequences of seagrass patchiness.
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