Invasive Species

The Florida Natural Areas Inventory (FNAI) has extensive experience monitoring invasive species and their impacts on Florida's rare species and ecosystems. FNAI can conduct a variety of invasive species surveys, management reviews, species distribution modeling, and training workshops to assist land managers. See some examples below.

Baseline Monitoring

We utilize transects, random sampling points, survey grids or permanent photo plots to map baseline presence data, determine population sizes, and prioritize treatment area.

Example: We surveyed bottomland forest to record pre-treatment infestation cover for the invasive plant small-leaf spiderwort (Tradescantia fluminensis) for a pilot treatment project. Using a network of 422 hexagons (20m interior radius) for rapid surveying, this project took two surveyors two days to assess the entire 130 acre project site. This method captures the variability of cover of the target species in the project area.

Hex plot of an invasive species coverage
Coverage of an invasive species observed during a survey

Post-herbicide Effectiveness Surveys

We have standard protocols to survey for invasive plant treatment projects conducted by contractors, ensuring both coverage of treatment area and control of target species is adequate.

Species Distribution Mapping

FNAI staff can perform early detection rapid response (EDRR) surveys, baseline surveys to determine the distribution and coverage of invasive plants, and post-treatment invasive plant surveys to document efficacy of invasive plant treatments and quantify improvements on the landscape. We can also provide a recommended management plan for the invasive plant species observed within the survey area. See example reports below:

Land Management Planning Support

We create invasive plant monitoring programs to assess invasive cover and determine the effectiveness of land management practices. We can also provide support on other invasives management topics including: integrating invasive species management with other land management activities, planning use of in-house staff vs. contractors in treating invasive plant populations, and the use of data collection apps to survey for invasive plant species or assess efficacy of control projects. Contact Dexter Sowell for more information.

Tools and Presentations

  • Identification and Management Training Workshops

    We can provide a day-long training workshop to educate participants how to identify invasive plant species from similar looking native species. We can also provide participants a workshop that shows typical signs of decline of plants due to herbicide application, and tips to assessing effectiveness of an herbicide treatment project.

  • Sample presentation from 2021

    Invasive Plant Directory

    Informational pages about the various invasives found in the state of Florida

  • Invasive Plant Collection App

    • KML for Avenza maps.
    • Instructions for Android & iOS users to bring a georeferenced PDF map into Avenza, link our schema to a map, and collect data in the field.
    • Instructions on how to use our Excel calculator tool to determine the percent control of a project.
    • Data schema available in both Word and Excel documents.