People are invited to enjoy a variety of free educational presentations hosted by the Cape Perpetua Collaborative during the Winter 2022 Cape Perpetua Speaker Series, which kicks off at 10 a.m. this Saturday, Jan. 8.

Guest speaker presentations will be held most Saturdays at 10 a.m. through March 12. Winter presentations will include a special focus on ocean acidification, transient killer whales, Oregon’s red abalone, Tahkenitch Landing site, pacific salmon, sea star population after wasting disease, kelp to whales and Oregon’s marine reserves. All events are free and held virtually on Zoom this season. The full series schedule can be viewed at https://tinyurl.com/2276j7f7

This Saturday’s presentation will be “Oregon Shellfish in an Acidified Ocean.” Changes to the global atmosphere result in regional shifts in Oregon’s nearshore ocean conditions. As ocean waters throughout the Pacific Basin become more acidified, the biogeochemistry of marine waters also changes along the thin ribbon of the Oregon coast and in bays and estuaries. These open coast and estuarine areas are inhabited by diverse communities of shellfish, including oysters, clams, mussels, abalone, crab, shrimp, sea stars sea urchins and many others. The presentation will describe ocean acidification as an emerging threat to marine communities, provide a description of the potential impacts to commercially and recreationally valuable groups of shellfish, and characterize the capacity of living shorelines such as kelp beds and eelgrass to serve as a buffer to acidified marine waters.


The presenter will be Steve Rumrill, shellfish program leader with the Oregon Department of Fish and Wildlife.

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