U.S. Fish and Wildlife Service Logo U.S. Fish and Wildlife Service

2008 "Volunteers Working With Invasives"
Grants Report Form

Display Report


Project Title: Mesquite Removal along Interpretive Trail
Region: 4
Station: Cabo Rojo NWR
Contact Person:
Name and Phone Number
Oscar Diaz 787-851-7258 ext. 250
Project Description:
(Up to 250 words)
The objective of this program is to remove, as much as posible, invasive Mesquite trees (Prosopis juliflora) and invasive grasses along the only interpretive trail on the Refuge. Also, suitable selected areas along the trail will be planted with native tree species.
List of Invasives Species Targeted:Common NameScientific Name
  Mesquite Prosopis juliflora
Guniea Grass Panicum maximum
Project Status: Completed
Project Completion Date
or Estimated Completion Date:


Volunteer Affiliation:
(Check all that apply)
VA_FriendsGrp             VA_GradIntern            VA_CivicOrg       
Volunteer Involvement:
Describe the type of work the volunteers performed. (Up to 150 words)
Volunteers are involved in all parts of the project, but most of their work involve the establishing and maintenance of native trees planted.
Total Number of Volunteers: 50-60
Total Number of Volunteer Hours: 840.0
List both new and existing partnerships utilized in this project. (Up to 150 words).
Existing: Friends Group (38) Empresas Padilla(3) New: Neighbors from adyacent community (6) Puerto Rico Ornithological Society (5)


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).
The project was a total success. Approximately 6 acres of mesquite infested subtropical dry forest were treated. Twenty two mature mesquite trees were chainsawed and carefully removed along the interpretive trail. Native trees, previously suppressed under these invasive mesquite trees, have now sufficient space to grow. In addition, 150 trees from 9 different native species were planted by 52 volunteers on May 9, 2009. Ninety two percent of all trees planted have survived to date, which is pretty good for a forest with scarse rainfall (yr aver 36 in) and high temperatures (yr aver. 79ºF). With the expected rains associated with the current hurricane season, chances are the native trees will get well established and survival rates would not diminish to unacceptable levels. Refuge Friends group and residents from the nearby community are very excited to see the Service moving along to restore the native vegetation along this highly visited trail. There is still one local resident that is watering the planted trees 3 times per week.
Number of Acres Treated: approx. 6 acres
Number of Acres Inventoried and/or Mapped:
Number of Acres Restored: 6 acres


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

Total Grant Amount:

$ $7,500.00

Breakdown of Expenditures:


Total $ Spent
% of Total Grant
Equipment / Supplies
Biocontrol Agents
Volunteer Stipends
Volunteer Coordinator Salary/Contract $4,800.00 64%
Restoration Materials
Other $2,700.00 36%
TOTAL $7,500.00 100%

Recommendations: (OPTIONAL)
How useful was this program for meeting refuge invasive species objectives and how can it be improved?
This was the only project implemented during FY09 on the Refuge removing invasive PLANT species. A small, but significant step toward recovery of the native subtropical dry forest and a very effective opportunity to work with our neighbors and friends to show them that it can be done.


- Return to Main Menu -