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2008 "Volunteers Working With Invasives"
Grants Report Form

Display Report


Project Title: Invasive Plant Early Eradication- North Boundary of the Blackjack Unit
Region: 2
Station: Aransas National Wildlife Refuge
Contact Person:
Name and Phone Number
Darrin M. Welchert
Project Description:
(Up to 250 words)
Currently several invasive species (Chinese tallow, Chinaberry, salt cedar, and several species of invasive grasses) have been documented on the Blackjack Unit. Several new invasive species including guinea grass and Brazilian pepper have been reported in the area. This project will provide significant information on the distribution, density, and composition of the invasive plants within the northern boundary of the Blackjack Unit. The Blackjack or Aransas Unit’s northern border is private range land that currently contains several species of invasive plants that have the ability to readily cross the refuge boundary and spread using transportation corridors including roads and firebreaks. This project provided the refuge with the means of early detection and eradication for these and other invaders.
List of Invasives Species Targeted:Common NameScientific Name
  Chinese tallow Sapium sebiferum
Salt cedar Tamarix spp.
Macartney rose Rosa bracteata
Bermuda grass Cynedon dactylon
Johnson grass Sorghum halepense
Vaseygrass Paspalum urvillei
King Ranch Bluestem Bothriochloa ischaemun
Australian Bluestem Bothriochloa bladhii
Guinea Grass Urochloa maxima
Project Status: Completed
Project Completion Date
or Estimated Completion Date:


Volunteer Affiliation:
(Check all that apply)
VA_FriendsGrp                             VA_MGardener    VA_Other
Volunteer Involvement:
Describe the type of work the volunteers performed. (Up to 150 words)
Volunteer involvement included two training sessions, invasive species mapping, and treatment data entry. The objectives of both trainings were to provide a tool to generate quantitative data on invasive weeds to assist the Refuge in its management efforts. Volunteers and staff were also instructed in the identification of invasive species. Volunteers mapped stands of Chinese tallow, Australian bluestem, vaseygrass, Macartney rose and King Ranch bluestem. The first training was held on October 15. The second training was on May 27. A total of 11 volunteers and staff attended both trainings.
Total Number of Volunteers: 6
Total Number of Volunteer Hours: 538
List both new and existing partnerships utilized in this project. (Up to 150 words).
Partnerships include: Refuge Volunteers, Texas Master Naturalists, Friends of Aransas and Matagorda NWR’s , U.S.F.W.S. Coastal Program, Texas Parks and Wildlife and Coastal Bend Bays and Estuaries Program (CBBEP).


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).
Approximately 850 acres were surveyed and mapped. All invasive species encountered were mapped and GPS locations recorded. This information was used to develop species distribution and density maps. The main database is housed in Refuge Lands Geographic Information Systems (RLGIS) in the Aransas NWR’s server. Invasive species were encountered and treated on 77 acres. Invasive species encountered were treated by foliar, frill and spray, cut stump method, and injection. When applicable trees were injected according to stem diameter, when stem diameter is 2 inches or larger the tree will be treated using the EZject system. The control rate for the above mentioned treatments was over 80%.
Number of Acres Treated: 77
Number of Acres Inventoried and/or Mapped: 850
Number of Acres Restored: 38


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

Total Grant Amount:

$ $11,550.00

Breakdown of Expenditures:


Total $ Spent
% of Total Grant
Equipment / Supplies $5,091.70 44%
Chemical $6,458.30 56%
Biocontrol Agents
Volunteer Stipends
Volunteer Coordinator Salary/Contract
Restoration Materials
TOTAL $11, 550.00 100%

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


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