A sea of poppies and other wildflowers
Michelle O'Herron

California State Parks Early Detection and Rapid Response (EDRR) Handbook for Invasive Species Management


This Early Detection Rapid Response (EDRR) Handbook for Invasive Species Management is designed for California State Parks (Parks) district natural resource managers and those planning and conducting terrestrial early detection surveys, field crews collecting data and eradicating new weeds, and partners, volunteers, or other groups interested in assisting and following these methods.

California State Parks Natural Resources Division (NRD) embarked on an EDRR pilot project in 2012 with Santa Cruz and Orange Coast Districts volunteering to lead the effort. Their Natural Resources (NR) staff contributed hundreds of hours in development of the methods and tested them firsthand. In 2014, Sierra, North Coast Redwoods, and San Diego Coast Districts joined the training and data collection effort. The original handbook was written in 2015 by Ramona Robison and Nita Barve (NRD) with Tim Hyland and Daniella Schweizer (Santa Cruz District). Technical assistance and review were provided by the Santa Cruz Resource Conservation District and the California Invasive Plant Council (Cal-IPC). Some of the contents of the original handbook have been preserved; we have updated and expanded on various components for greater clarity and utility. This version was reviewed by Tim Hyland (Santa Cruz), Lana Nguyen (Orange Coast), and Michelle Forys (North Coast Redwoods) who are all implementing successful EDRR programs in their respective districts.


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