This blog post introduces new research by Tsleil‑Waututh Nation and University of British Columbia researchers who modeled the cumulative impact of colonial forces—such as smallpox, settler fishing, shoreline destruction, and pollution-driven shellfish closures—on the Burrard Inlet ecosystem from 1750 to 1980. Their findings show a dramatic 88 percent decline in traditional foods available to the səlilwətaɬ, dropping from roughly 42.7 tonnes/km² to just 5.1 tonnes/km². Species once central to Tsleil‑Waututh diet and culture—including salmon, herring, clams, smelt, and sturgeon—were almost entirely lost, with some fisheries collapsing by 100 percent. The study highlights how these colonial impacts severely infringed on Indigenous harvesting rights. It underscores the need for restoration, legal recognition, and collaborative management of the Inlet to uphold Tsleil‑Waututh sovereignty and cultural traditions. Includes a link to the full report: https://twnation.ca/wp-content/uploads/2025/07/efford-et-al-unsettling-the-record-modelling-the-devastating-cumulative-effects-of-selected-environmental-stressors-and-1.pdf