Recommendations for built marine infrastructure that supports natural habitats

The extent of built marine infrastructure—from energy infrastructure and ports to artificial reefs and aquaculture—is increasing globally. The rise in built structure coverage is concurrent with losses and degradation of many natural habitats. Although historically associated with net negative impacts on natural systems, built infrastructure—with proper design and innovation—could offer a largely unrealized opportunity to reduce those impacts and support natural habitats. We present nine recommendations that could catalyze momentum toward using built structures to both serve their original function and benefit natural habitats (relative to the status quo, for example). These recommendations integrate functional, economic, and social considerations with marine spatial planning and holistic ecosystem management. As the footprint of the Anthropocene expands into ocean spaces, adopting these nine recommendations at global scales can help to ensure that ecological harm is minimized and that, where feasible, ecological benefits from marine built structures are accrued.