Clam Gardens: An Indigenous Community-Driven Climate Adaptation Strategy to Manage Aquatic Species and Habitats in the Pacific Northwest
Dates
Start Date
2021-11-01
End Date
2023-10-31
Release Date
2021
Summary
Healthy shellfish beds provide important ecosystem services, support local economies, and promote human well-being and sense of place. For Coast Salish Tribes, including the Swinomish Indian Tribal Community (SITC), clams are a highly valued traditional food, playing a key role in Coast Salish worldviews. Clam harvests also provide: opportunities for tribal members to exercise their treaty rights; access to a local source of protein; and educational opportunities where elders can share teachings with youth that honor and reinforce community values like stewardship and reciprocity. However, clams and clam habitats are threatened by climate change and ocean acidification. Recent research reports a decline in native littlenecks and butter [...]
Summary
Healthy shellfish beds provide important ecosystem services, support local economies, and promote human well-being and sense of place. For Coast Salish Tribes, including the Swinomish Indian Tribal Community (SITC), clams are a highly valued traditional food, playing a key role in Coast Salish worldviews. Clam harvests also provide: opportunities for tribal members to exercise their treaty rights; access to a local source of protein; and educational opportunities where elders can share teachings with youth that honor and reinforce community values like stewardship and reciprocity. However, clams and clam habitats are threatened by climate change and ocean acidification. Recent research reports a decline in native littlenecks and butter clam populations, two culturally-important native clam species in the Pacific Northwest. To confront these trends and secure the resource for future generations, SITC has embarked on a project to revive the ancient tradition of clam gardening, a centuries-old Indigenous aquaculture practice utilizing a variety of habitat enhancement techniques to increase local clam production and species diversity. This strategy includes clearing rocks from sand flats, aerating the sediment, selectively harvesting clams, and installing low-lying rock walls parallel to the shoreline. Over time, sediment and shell hash accumulate on the landward side of the wall, reducing the slope of the beach and eventually forming a terrace that increases viable clam habitat. SITC’s clam garden will be the first built in modern times in the United States. The overarching goals of the SITC Clam Garden Strategy are to sustainably produce and harvest native clams and enhance the ecological and socio-cultural resiliency of SITC. This Northwest CASC project would advance the Tribe’s clam garden efforts by supporting: (1) the hiring of a Swinomish Clam Garden Community Liaison to help guide the development of the clam garden; (2) engagement of the Swinomish community in the installation of the clam garden; and, (3) collection of ecological and socio-cultural data before and after installation. The results will enhance habitat and clam productivity, promote tribal treaty rights, and implement a place-based climate adaptation strategy for long-term resource use and conservation that is replicable for other coastal fishing communities.