National Park Service

San Francisco Bay Area Network (SFAN)

Invasive Plant Monitoring

Italian Buckthorn (Rhamnus alaternus) at Golden Gate NRA
Italian Buckthorn (Rhamnus alaternus) at Golden Gate NRA

Monitoring Documents

Parks monitored:

For more information contact: Eric Wrubel


Invasives brief

Invasive Plant Early Detection Monitoring in the San Francisco Bay Area Network parks resource brief
Click on image to download...

Invasive plant species negatively affect park resources and visitor enjoyment by altering ecological processes, reducing native plant and animal habitat, blocking views, and increasing trail maintenance needs. Invasive species are the second greatest threat to global biodiversity, after habitat loss.

Given the extraordinary biodiversity of the San Francisco Bay Area and its urban development pressures, the San Francisco Bay Area Network (SFAN) parks serve as crucial habitat for native species. Over 100 rare plant species can be found in SFAN parks. Invasive plants threaten many of these rare species.

Discovering invasive plants before they become well-established is critical to reducing damage to ecosystem integrity, preventing the loss of habitat for rare plants and animals, and preventing costly natural resource management. Trails, roads, and waterways are the main routes of infestation of new exotic species. Monitoring these routes is the most effective way to prevent the spread of existing species and the infestation of new species.

Invasive plants are monitored in SFAN parks through partnerships between the National Park Service, Golden Gate National Parks Conservancy, and Point Reyes National Seashore Association, as well as by volunteers and students.

Additional information about invasive plants monitored in SFAN parks may be found on the San Francisco Bay Area National Parks Science and Learning Center webpage for invasive plants.

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Last Updated: December 30, 2016 Contact Webmaster