Fifteen years of Northwestern Pond Turtle
Fifteen years of Northwestern Pond Turtle (Actinemys marmorata) Mark-Recapture Study in a Livestock Pond Subjected to Drought in Central California.
By Dave Riensche, East Bay Reg Park District
The Northwestern Pond Turtle (Actinemys marmorata) has been declining throughout its range, is listed as a California Species of Special Concern, and a candidate species for listing under the federal Endangered Species Act. From 2011 to the present, EBRPD staff and volunteers have conducted a turtle mark-recapture effort to understand the population’s demographics, nest site selection, habitat use, movement patterns, individual growth rates, and drought response in Contra Costa County, California. The findings demonstrate how they respond to a single-season drought, but with the increased frequency and severity of droughts due to climate change, this may have grave consequences for our native California turtles.
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