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2007 "Volunteers Working With Invasives"
Grants Report Form

Display Report


Project Title: Humboldt Bay NWR Volunteer Invasives Mapping and Control
Region: 8
Station: Humboldt Bay NWR
Contact Person:
Name and Phone Number
Patricia Clifford (707) 822-6378
Project Description:
(Up to 250 words)
Humboldt Bay NWR plays a unique role with its contribution to the protection of coastal dune and estuarine ecosystems. Its northern units represent some of the most pristine coastal dune ecosystems of the Pacific Coast of the United States. The southern units are an integral piece of the Pacific Flyway. Invasive species threaten the ecological health of these diverse ecosystems. The refuge volunteer invasives program has a four-year history of volunteer commitment. Between 2003-2006, volunteers spent over 1,000 hours on mapping and control of invasive species. Nine hundred acres were surveyed for 24 high priority invasive weed species and 10 species from the refuges priority list were mapped. This years proposal emphasizes the continued capacity building of the volunteer-supported invasive weed mapping and control program. With funding from this grant the Volunteer Weed Eradication Event developed in 2006 will continue at the south bay units. This annual event is focused on eradication of early detection species. Several new weed eradication events will be developed in the northern units. The events will focus on invasive annual grasses which threaten the habitat of two Federally listed endangered plant species, Humboldt Bay wallflower and beach layia. Surveying the southern units for high priority species will continue. Several early detection species, Lotus uliginosus, Senecio sylvaticus, and Erichtites glomerata will be mapped in the Hookton Slough Unit. Volunteers will gather literature on the life history and distribution of these species to aid in the assessment of their impacts to the estuarine ecosystem.
List of Invasives Species Targeted:Common NameScientific Name
  cutleaf burnweed Erichtities glomerata
Senecio sylvaticus
barnyard grass Echinochloa crus-galli
reed canary grass Phalaris arundinacea
harding grass Phalaris aquatica
poison hemlock Conium maculatum
bull thistle Cirsium vulgare
canada thistle Cirsium arvense
jubata grass Cortaderia jubata
Project Status: InProgress
Project Completion Date
or Estimated Completion Date:


Volunteer Affiliation:
(Check all that apply)
VA_FriendsGrp     VA_SchoolGrp                            VA_Other
Volunteer Involvement:
Describe the type of work the volunteers performed. (Up to 150 words)
Volunteers were trained in the use of PDA/GPS units using the Nature Conservancy's WIMS program and ArcPad. The volunteers surveyed a total of 227 acres for 25 high priority invasive weed species. Volunteers attended the second annual invasive weed removal event at the Salmon Creek Unit, HBNWR.
Total Number of Volunteers:
Total Number of Volunteer Hours:
List both new and existing partnerships utilized in this project. (Up to 150 words).


Project Results:
Give an overview of the results of the project. Include quantifiable measure of success, such as maps produced, efficacy of control measures, number of sites where invasions were detected early and responded to, number of community contacts, etc. (Up to 250 words).
Number of Acres Treated:
Number of Acres Inventoried and/or Mapped: 7000
Number of Acres Restored:


Budget: Account for funds in broad categories such as equipment, volunteer stipends, travel, coordinator salary/contract, etc.

Total Grant Amount:

$ 7,000

Breakdown of Expenditures:


Total $ Spent
% of Total Grant
Equipment / Supplies
Biocontrol Agents
Volunteer Stipends
Volunteer Coordinator Salary/Contract 2035 29
Restoration Materials

Recommendations: (OPTIONAL)
How useful was this program for meeting refuge invasive species objectives and how can it be improved?
The project is still in progress. There will be volunteer annual grass removal event in the spring and some additional mapping. I will complete form and recommendations then.


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