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Volunteer Invasives Mapping Project Report

Display Report


First Year of Project
Station: San Pablo Bay NWR, Marin Islands NWR
Region: 1
Contact Person: Giselle Block
Contact Phone Number: 707-769-4200
Date Report Submitted:

List Type and/or Affiliation(s) of Volunteers: Refuge volunteers, non-profit partners (The Bay Institute, Save the San Francisco Bay Assoc., Freinds of San Pablo Bay NWR, Sonoma Land Trust)
Total Number of Volunteers Trained to Map: 20
Total Number of Volunteer Hours Spent Mapping: 660

List of Invasives Species Mapped:Common NameScientific Name
  perennial pepperweed Lepidium latifolium
iceplant Carpobrotus edulis
pampass grass Cortaderia selloana
arundo grass Arundo donax
erect veldtgrass Ehrharta erecta
Which, if any, of these Species are Early Detection Species: Arundo donax, Ehrharta erecta
Total Number of Acres Mapped (since project initiation): SPBNWR =3,611 , MINWR = 10
Have You Shared Mapping Data with USGS in Ft. Collins? Yes

Describe Projects Initiated with Follow-Up Funds ($10,000): Since initiation of the program the following projects have been initiated (funds obtained from various sources are given in parentheses): invasive plant mapping at San Pablo and Marin Islands NWR's (19K), establishment of native plant nursery and native plant propagation(40,363), Development of L. latifolium control plan (6K), native plant restoration/education with partners (19K), treatment of L. latifolium w/ partners(May 2007;1,793 ac.; 15K), Invasive plant removal at Marin Islands NWR (0.25 ac., $100)
Total Number of Acres Treated with Follow-up Funding: 0
Total Number of Acres Restored with Follow-up Funding: 0.5
Total Number of Volunteers Engaged in Treatment and/or Restoration: 305


How has this Project Benefited Invasive Species Management Efforts at Your Station? The Volunteer Invasives Mapping Project has allowed San Pablo Bay NWR to develop and implement a program focused on control of invasive plant species and restoration of native plant assemblages. The program has also expanded to Marin Islands NWR. Much of the annual follow-up funds (e.g., 10K) have been used to build the infrastructure for our mapping program (e.g., GPS units, kayaks, field supplies) and to hire interns for mapping and related restoration. The initial training, base funds, and subsequent mapping efforts have provided significant leverage for obtaining additional grants to fund large-scale treatment, native plant propagation and planting (restoration), and education. We have built several new partnerships as a result of this program: The Bay Institute, Save the San Francisco Bay Assoc., Sonoma Land Trust, CA Dept. of Fish and Game, Marin-Sonoma Weed Mgt. Area. As a result of our success in 2006, The Bay Institute is now raising funds so they can continue working with the Refuge in 2007 and assist with Refuge treatment and propagation funding. In 2006 we established the San Pablo Bay Native Plant Nursery and successfully propagated and planted over 3,300 plants. Our hope is that these species will act as a source from which natives can spread throughout the Refuge. Large-scale treatment of Lepidium latifolium will take place at San Pablo Bay NWR in May 2007. This is the first well-documented project focused on control of this species in a tidal marsh environment.
What are some of the Lessons Learned and/or Troubleshooting Points that could be Shared with Others Engaged in Similar Activity?
Be patient with technology, monitor your efforts, find/make new partners, join your local weed mgt. area if you have one, treat your volunteers really well, leverage your volunteers as in-kind $ to raise additional funds for control/restoration.


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