2010 "Volunteers Working With Invasives"
Grants Report Form
PROJECT BACKGROUND INFORMATION
Inventory and Monitoring of Invasive Plants on Moist Soil Management Units of the San Luis and Merced National Wildlife Refuges
San Luis National Wildlife Refuge Complex
Name and Phone Number
Project Leader Kim Forrest, (209) 826-3508
(Up to 250 words)
Refuge/Wetland Management District: San Luis National Wildlife Refuge Complex (San Luis NWR and Merced NWR), Merced County, California Project Description: Use of volunteers and staff equipped with GPS units to inventory and quantify the distribution and abundance of the vegetative community of 100+ moist soil management units (5,000+ acres) at the San Luis and Merced National Wildlife Refuges with the resulting products being an inventory and report of the occurrence and abundance of wetland plants including invasive species in these wetlands. These moist soil management units provide critical seasonal habitat for over half a million ducks as well as countless shorebirds. Moist soil management units require intensive management actions, information is needed on the desired vegetative outcomes of these management activities as well as to determine levels of invasive wetland species in these highly disturbed management units. All moist soil management units on the San Luis and Merced NWRs will be sampled by volunteers from local universities and staff. A standard protocol will be used for sampling and quantifying the vegetative communities of these wetlands. All seasonal wetland units (n=107) on the San Luis and Merced NWRs will be sampled. These units cover a range of soil types, resource objectives, juxtaposition within the water conveyance system, and management regimes (i.e. time since rehab). Vegetative sampling will be conducted after plants have matured, but before units are flooded in the early autumn. The sampling window will occur from 1 July through 1 September. Within each wetland unit, two 100-meter transects will be systematically established in each wetland unit. A point intercept method will be employed along these transects to determine the percent cover of each wetland plant species and bare ground. Aside from quantifying the vegetation community, other parameters to be measured include biomass and height. A final report will document the frequency and abundance of plants in these moist soil units including invasive species as well as any vegetative trends associated with management activities. The analyses will also include a comparison of the vegetation communities in these units in 2010 with 2007. Treatment actions will also be scheduled based on the results of monitoring for invasive species at these sites.
List of Invasives Species Targeted:
Project Completion Date
or Estimated Completion Date:
(Check all that apply)
Describe the type of work the volunteers performed. (Up to 150 words)
College students in a natural resource/biological program from local universities as well as others including a local high school environmental group were used on this project as part of the Complex’s volunteer program.
Total Number of Volunteers:
Total Number of Volunteer Hours:
List both new and existing partnerships utilized in this project. (Up to 150 words).
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 combination of volunteers and staff using GPS units inventoried and quantified the distribution and abundance of the vegetative community of 115 moist soil management units (5,200 acres) at the San Luis and Merced National Wildlife Refuges with the resulting products being an inventory and report of the occurrence and abundance of wetland plants including invasive species in these wetlands. These moist soil management units provide critical seasonal habitat for over half a million ducks as well as countless shorebirds. Moist soil management units require intensive management actions, information was needed on the desired vegetative outcomes of these management activities as well as to determine levels of invasive wetland species in these highly disturbed management units. The plant community of each moist soil unit was quantified. Over 20 species of plants were documented on the moist soil units. However, 10 species make up over eighty percent of the cover of these moist soil units. Approximately fifty percent of the vegetative cover consists of desirable seed producing hydrophytes such as swamp timothy, smartweed, alkali bulrush and watergrass and approximately twenty percent of the community consists of robust emergent vegetation such as cattail and bulrush. Invasive, exotic plant species accounted for under five percent of the cover of the vegetative community of these units. Comparisons of the vegetative communities of these moist soil units between 2007 and 2010 found no major differences in the species cover between years.
Number of Acres Treated:
Number of Acres Inventoried and/or Mapped:
Number of Acres Restored:
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
Volunteer Coordinator Salary/Contract
How useful was this program for meeting refuge invasive species objectives and how can it be improved?
This program was extremely useful for documenting the vegetation communities of moist soil units across two National Wildlife Refuges. Management of moist soil units is labor intensive and it is critical to document the results of these management activities.
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