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2008 "Volunteers Working With Invasives"
Grants Report Form

Display Report


Project Title: Humboldt Bay National Wildlife Refuge Invasive Weed Mapping and Control.
Region: 8
Station: Humboldt Bay NWR
Contact Person:
Name and Phone Number
Shannon Smith, 707-733-5406
Project Description:
(Up to 250 words)
The Humboldt Bay National Wildlife Refuge (HBNWR) Invasive Weed Mapping Project is an on-going effort to include volunteers in the mapping and control of invasive plant species on the Refuge. This program consists of five elements: weed prioritization, staff training, volunteer recruitment and training, invasive weed mapping, and invasive weed control. This year the program emphasized a continuation of capacity building. Volunteers were recruited from the Refuge Youth Conservation Corps applications and were provided with stipends. The volunteers and contractors focused on surveying the Table Bluff Unit for the 30 invasive weeds identified as concerns for the Refuge. Control of Cirsium vulgare, Senecio sylvatica, and Erechtites glomerata was initiated after surveying. Portions of the Salmon Creek Unit were surveyed for Picris echioides and Cirsium arvense. Control of Picris echioides was begun around the Rich Guadagno Visitors Center and along the trail system.
List of Invasives Species Targeted:Common NameScientific Name
  Large bindweed Calystegia sylvatica
Canada thistle Cirsium arvense
Bull thistle Cirsium vulgare
Poison-hemlock Conium maculatum
Jubatagrass Cortaderia jubata
Yellow nutsedge Cyperus esculentus
Cutleaf burnweed Erechtites glomerata
Fennel Foeniculum vulgare
English ivy Hedera helix
Project Status: InProgress
Project Completion Date
or Estimated Completion Date:


Volunteer Affiliation:
(Check all that apply)
Volunteer Involvement:
Describe the type of work the volunteers performed. (Up to 150 words)
Volunteers were trained to use a GPS/PDA system. ArcPad software was used with The Nature Conservancy’s Weed Information Management System program to integrate geographical and biological data of invasive weeds on the Refuge. The volunteers were trained in the identification of invasive weeds of concern to the Refuge. They were also trained in control methods for several species slated for removal and in safety issues related to working in remote areas with hand-tools. The volunteers efficiently surveyed the Table Bluff Unit for three invasive species. The contractors worked with the volunteers and surveyed for the remaining 27 species. This year the number of species that volunteers needed to identify was reduced. This strategy enabled the volunteers to be more accurate in their plant identification and allowed them to focus on learning how to use the GPS units. Volunteers removed Cirsium vulgare and Erechtites glomerata from portions of the Table Bluff Unit.
Total Number of Volunteers:
Total Number of Volunteer Hours:
List both new and existing partnerships utilized in this project. (Up to 150 words).
Volunteers were recruited through the local YCC program. This recruiting method produced a group of dedicated high school students. The volunteers were eager to assist the Refuge in its invasive species control and mapping methods. Initial contact for this project, was made with a local high school conservation oriented club. Students from this club have participated in restoration and invasive weed control activities at the Refuge in the past. The local SWAP crew worked on the removal of several weed species at the Table Bluff Unit.


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).
A total of 160 acres were mapped this year at the Table Bluff Unit. Surveying for the 30 priority invasive weed species was completed on the Table Bluff Unit. Areas of the Salmon Creek Unit were resurveyed to map occurrences of high priority species. Six A rated species, Cirsium vulgare, Senecio sylvaticus, Erechtites glomerata, Conium maculatum, Rubus discolor, Phalaris arundinacea, were discovered and mapped at the Table Bluff Unit and six A rated species, Cirsium vulgare, Phalaris arundinacea, Picris echioides, Cirsium arvense, Lotus uliginosus, Cortederia jubata, were mapped at the Salmon Creek Unit. Sixteen maps were created, showing the distribution and treatment of invasive weeds at the Table Bluff and Salmon Creek Units. A map depicting the absence of 24 high-priority species at the Table Bluff Unit was also created. Over 1,200 pounds of invasive weeds were hand-pulled and hauled away to the composters. Volunteers spent 107 (add in Swap hours) hours controlling incipient populations of Cirsium vulgare and Erechtites glomerata. This initial effort will require follow up treatments to ensure and seedlings from the seed bank are treated. Treatment sites were qualitatively monitored with before and after photographs.
Number of Acres Treated:
Number of Acres Inventoried and/or Mapped: 160
Number of Acres Restored:


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

Total Grant Amount:


Breakdown of Expenditures:


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

Recommendations: (OPTIONAL)
How useful was this program for meeting refuge invasive species objectives and how can it be improved?


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