Abstract

Anchorages are specific areas used by vessels to maintain position and are used as waiting areas for freighters wanting to enter ports. The surge in demand experienced by ports from 2019 to 2022 significantly extended wait times at anchorages, heightening concerns of potential ecological and socio-economic effects among coastal communities. Effective anchorage management requires a connected and holistic approach to understand these diverse and complex effects. We summarise current knowledge on the cumulative effects of anchoring on ecological and socio-economic endpoints in a Pathways of Effects conceptual model informed by scientific literature and public consultation documents. We developed a Pathways of Effects Matrix (PoEM), a graphical advance designed to concisely visualise complex effects and explore mitigation scenarios, demonstrated in the example for commercial anchoring in Pacific Canada. In addition to supporting management decisions, this simple visual tool can also provide a way for communities to communicate their concerns in a structured way.

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