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Invasive Plant Species Early Detection in the San Francisco Bay Area Network 2008 Annual Report National Park Service U.S. Department of the Interior Natural Resource Program Center Invasive Plant Species Early Detection in the San Francisco Bay Area Network 2008 Annual Report Natural Resource Report NPS/SFAN/NRTR—2010/308 ON THE COVER Golden Gate Weed Watcher Volunteers Caorlyne Orazi, Lou Sian, and Debbie Blancas Conduct Survey of Sweeney Ridge Photograph by: Jen Jordan, NPS Invasive Plant Species Early Detection in the San Francisco Bay Area Network 2008 Annual Report Natural Resource Report NPS/SFAN/NRTR—20XX/XXX Andrea Williams Marin Municipal Water District Sky Oaks Ranger Station 220 Nellen Avenue Corte Madera, CA 94925 Jen Jordan National Park Service San Francisco Bay Area Network Fort Cronkhite Building 1063 San Francisco, CA 94965 April 2010 U.S. Department of the Interior National Park Service Natural Resource Program Center Fort Collins, Colorado The National Park Service, Natural Resource Program Center publishes a range of reports that address natural resource topics of interest and applicability to a broad audience in the National Park Service and others in natural resource management, including scientists, conservation and environmental constituencies, and the public. The Natural Resource Technical Report Series is used to disseminate high-priority, current natural resource management information with managerial application. The series targets a general, diverse audience, and may contain NPS policy considerations or address sensitive issues of management applicability. All manuscripts in the series receive the appropriate level of peer review to ensure that the information is scientifically credible, technically accurate, appropriately written for the intended audience, and designed and published in a professional manner. Data in this report were collected and analyzed using methods based on established, peer- reviewed protocols and were analyzed and interpreted within the guidelines of the protocols. This report received formal peer review by subject-matter experts who were not directly involved in the collection, analysis, or reporting of the data, and whose background and expertise put them on par technically and scientifically with the authors of the information. Views, statements, findings, conclusions, recommendations, and data in this report are those of the author(s) and do not necessarily reflect views and policies of the National Park Service, U.S. Department of the Interior. Mention of trade names or commercial products does not constitute endorsement or recommendation for use by the National Park Service. This report is available from the San Francisco Bay Area Network Invasives website (http://science.nature.nps.gov/im/units/sfan/vital_signs/Invasives/invasives.cfm ) and the Natural Resource Publications Management website (http://www.nature.nps.gov/publications/NRPM ). Please cite this publication as: Williams, A. E., and J. Jordan. 2010. Invasive plant species early detection in the San Francisco Bay Area Network: 2008 annual report. Natural Resource Technical Report NPS/SFAN/NRTR—2010/308. National Park Service, Fort Collins, Colorado. NPS 963/101816, April 2010 ii Contents Page Executive Summary ...................................................................................................................... vii Acknowledgements ........................................................................................................................ ix 1.0 Introduction ............................................................................................................................... 1 1.1 Background ........................................................................................................................... 1 1.2 Objectives ............................................................................................................................. 2 2.0 Methods..................................................................................................................................... 3 2.1 Prioritization ......................................................................................................................... 3 2.1.1 Species .......................................................................................................................... 3 2.1.2 Areas .............................................................................................................................. 3 2.2 Search Areas ......................................................................................................................... 4 2.3 Field Methods ....................................................................................................................... 4 2.4 Trainings ............................................................................................................................... 5 2.5 Analyses/GIS Manipulations ................................................................................................ 6 2.6 Species List Revisions .......................................................................................................... 6 3.0 Results ....................................................................................................................................... 7 3.1 GOGA ................................................................................................................................... 7 3.2 PORE .................................................................................................................................... 8 3.3 PINN ................................................................................................................................... 14 4.0 Discussion ............................................................................................................................... 17 4.1 Species Ouccurrences ......................................................................................................... 17 4.2 Species List Revisions ........................................................................................................ 17 4.3 Outreach .............................................................................................................................. 19 4.4 Collaboration....................................................................................................................... 20 6.0 Literature Cited ..................................................................................................................... 223 7.0 Glossary .............................................................................................................................. 2524 iii iv Tables Page Table 1. Number of invasive species and number of subwatersheds with invasives species found at GOGA in 2008. ........................................................................................................................... 8 Table 2. GOGA Occurrences and subwatersheds based on 2006-2008 field results. 2008 percentages based on 80 subwatersheds searched. ....................................................................... 10 Table 3. Number of invasive species and number of subwatersheds with invasives species found at PORE in 2008. .......................................................................................................................... 11 Table 4. PORE Occurrences and subwatersheds based on 2008 field results. Percentages based on 33 subwatersheds searched. ..................................................................................................... 12 Table 5. Number of invasive species and number of subwatersheds with invasives species found at PINN in 2008. ........................................................................................................................... 15 Table 6. PINN Occurrences and subwatersheds based on 2008 field results. Percentages based on 2 subwatersheds searched. ............................................................................................................ 15 Table 7. Revisions to the GOGA priority species list for 2009. ................................................... 18 Table 8. Revisions to the PORE priority species list for 2009. .................................................... 18 v Appendices Page Appendix A. Maps showing prioritized subwatersheds. .............................................................. 27 Appendix B: List of priority invasive species by park (2008). ..................................................... 31 vi Executive Summary In 2000, the National Park Service (NPS) created 32 networks of NPS units across the United States that were formed and funded to “improve the ability of the NPS to provide state-of-the-art management, protection, and interpretation of and research on the resources on the NPS … and to assure the full and proper utilization of the results of scientific studies for park management decisions” (NPS 1998). The San Francisco Bay Area Network (SFAN) is one of eight of these networks in the Pacific West Region of the NPS. SFAN is composed of eight park units and includes Point Reyes National Seashore (PORE), Pinnacles National Monument (PINN), John Muir National Historic Site (JOMU), Eugene O’Neill National Historic Site (EUON), and Golden Gate National Recreation Area (GOGA) including Muir Woods National Monument and Fort Point National Historic Site. The network fosters collaboration and creates efficiencies of scale in designing and implementing a natural resource focused
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