Center for Marine Biodiversity and Conservation

The southern California coast is well known for its surfing, beachfront towns, and high marine biodiversity. Humans share these coastal regions with species such as the green sea turtle (Chelonia mydas; hereafter referred to as “green turtle”). Over the last two decades, East Pacific (EP) green turtles have undergone substantial population recovery. As a result of improved protection efforts at nesting beaches and foraging areas in Michoacán, Mexico beginning in 1979 green turtles have been spotted in more areas and in greater numbers than before since 2014.1 An analysis of existing stranding and sighting data is necessary to protect the growing EP green turtle population and ensure their continued population recovery in highly populated areas along the California coast. While the existing green turtle recovery plan (completed in 1998) addresses EP green turtles, it is dated and does not specifically address current known threats to this population, particularly in southern California. 2 Therefore, this report and accompanying StoryMap (link: https://arcg.is/0eX1zK) provide analyses on time-relevant and local scales. With the support of experts from the National Oceanic and Atmospheric Administration’s (NOAA), National Marine Fisheries Service (NMFS), and the University of California San Diego, I review existing literature, analyze stranding and sighting data, and propose recommendations that could help reduce the human impacts on green turtles in the southern California region if implemented.

Storymap for this project can be viewed here: https://storymaps.arcgis.com/stories/391c53f931dd45619347177810259dd3