“…Intertidal ecosystem engineers (e.g., bivalves, barnacles, cordgrass, macroalgae: Seed, ; Bruno & Kennedy, ; Burnaford, ; Cartwright & Williams, ) can provide cool microclimates and, unlike substrate topography (i.e., crevices, rock pools), can respond to the changing environment (Duarte, Losada, Hendriks, Mazarrasa, & Marbà, ). Gregariously settling bivalves such as oysters and mussels, for example, can form dense aggregations of various topographies on soft and hard coastal substrata, producing habitats ranging from two‐dimensional beds on hard substrata to three‐dimensional oyster reefs (Gillies et al, ; Figure ). Consequently, on mid‐intertidal substrata in many parts of the world, these habitat‐forming bivalves are often dominant space occupants, in some instances approaching 100% cover (Bahr & Lanier, ; McAfee, Cole, & Bishop, ).…”