2007 "Volunteers Working With Invasives"
Grants Report Form
PROJECT BACKGROUND INFORMATION
Eradication of Salt Cedar from a Gulf Coastal Prairie
Name and Phone Number
Thomas Adams/(979) 292-5642
(Up to 250 words)
This project attempted to remove old growth salt cedar spanning 30 acres across a coastal prairie. Method of removal involves both mechanical and chemical treatments.
List of Invasives Species Targeted:
Project Completion Date
or Estimated Completion Date:
(Check all that apply)
VA_GradIntern VA_StudentConsAssoc VA_Other
Describe the type of work the volunteers performed. (Up to 150 words)
"Snow Bird" mechanics were instrumental in maintaining the unpredictable gyro-trac vehicle. Two students, one graduate and the other recently graduate, participated in walking the site and assisting staff in mapping treatment sites and spraying re-emerging salt cedar shoots. The site was isolated to 0.5 acres. This was the last of the surviving salt cedars and are now chemically eradicated.
Total Number of Volunteers:
Total Number of Volunteer Hours:
List both new and existing partnerships utilized in this project. (Up to 150 words).
Friends of Brazoria NWR
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).
At present the project is determined to be a success. This is due in large part to how I measured it: the presense or absence of target species after eradication treatments. Two stages were involved: 1) use a gyro-trac vehicle to shred salt cedar to the ground and 2) follow up individual spraying of re-emerging shoots a month later with the herbicides Arsenal and Garlon-4. Other targets of opportunity were Chinese tallow trees and eastern baccharis. Four sites were mapped with Tremble GPS units and incorporated into ArcGIS 9.2 GIS program. 100% success will utimately be determined by spring 2008. At this time native prairie species should be well established within the treated sites. The lessons learned from this is that re-emerging salt cedar shoots can be sprayed as soon as 3 weeks after mechanical treatment.
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?
It isn't often that a significant percentage of invasive species populations can be eradicated on this coastal refuge. The refuge manager plans to obtain use of the gyro-tract vehicle next year to continue eradication of salt cedar in other units on the salt prairie. Any room for improvement may be in determining exactly how much percentage of herbicide is needed to cause species mortality. This was a major moral boost!
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