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Choosing Your Battles, Prioritizing Invasive Plant Management
Tim Hyland, Santa Cruz District Cal-IPC Symposium October 9th, 2014
Hypericum canariense, San Mateo County
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What your predecessor worked on? What has funding?
Favorite Place? Favorite Weed?
How to Prioritize?
Potpourri of Weeds, Adjacent to Año Nuevo SP
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Wilder Ranch & Henry Cowell Redwoods SP
What And Where Are Your Weeds?
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Our Approach
• Goal
• Rate/Likelihood of Spread
• Threat to Sensitive Resources
• Logistics
• Politics
• Potential for Success
• Eradication dividend
Vinca major, Henry Cowell Redwoods SP
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Goal
• Eradication
• Elimination / Zero Density
• Outlier Control
• Perimeter Control
• Sustained Control
French Broom, Twin Lakes SB
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Rate / Likelihood of Spread
Año Nuevo SP Hypericum canariense, San Mateo County
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Threat to Sensitive Resources
• Listed Species
• Rare Habitats
Portuguese Broom in Sand Parkland, Santa Cruz County
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Logistics
• Distance from base of operations
• Steep slopes
• Accessibility
• Poison oak
• Complexity of control techniques
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Politics
• Multiple Land Owners
• Visibility of Project
• Public Perception
• Permitting
• Other entities Interested in Helping
Natural Bridges SB
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• Efficacy of Control
• Seed Bank
• Detectability
• Life Cycle
Potential for Success
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• Efficacy of Control Method
• Seed Bank
• Detectability
• Life Cycle
• Likelihood of Reinvasion
Potential for Success
Sunset SB
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Eradication Dividend
Eucalyptus globulus, Santa Cruz County
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Excel Ranking Form
Park M.U. Sub M.U. Goal Species Wilder Ranch Gray Whale Baldwin Grasslands Zero Density Cotoneaster
Likelihood of spread 2
Threat to sensitive resources 2
Logistics (P.O. slope, access) 3
Political (Neighbors, county, crew morale) 3
Potential for Success (Restoration, follow up) 3
Eradication dividend (Effort required to maintain goal) 2
Ranking 15
Scores range from 0-3 with the highest number denoting ease and threat
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Final Product
Resources Management Priorities: Fall 2014 (September 1st to November 30th)
Park Mng. Unit Species Priority Est. Hrs. Comments
5 Year Goal
Big Basin Lower Waddell Ammophila 16 Su F W 0 Reilly zero density
Sunset Dune system Ammophila 17 Su F W 224 Hyland zero density
Sunset State Preserve Calla lilies 14 F 0 with Ehrharta erradicate
Manresa Uplands Cape Ivy 13 Su F W 0 sustained control
Wilder Seaward of Hwy 1 Cape Ivy 13 Su F 0 containment
Ano Coastal Prairie Cypress 14 Su F W 56 erradicate
Ano Ano Point Cypress 16 Su F W 56 Perimeter Control
Ano Franklin Point Cypress 16 Su F W 0 Completed summer Perimeter Control
Ano South Doug-Fir 16 F W 0 Completed summer Perimeter Control
Wilder Inland of Hwy 1 Doug-Fir 16 F W 0 Completed summer Outlier Control
Wilder Gray Whale Doug-Fir 16 F W 112 Outlier Control
Henry Cowell Sand Hills Doug-Fir 17 F W 28 Perimeter Control
Sunset State preserve Ehrharta calycina 17 Su F W Sp 56 zero density
Portola Campground Ehrharta erecta 17 Su F W Sp 0 completed summer zero density
Sunset State preserve Ehrharta erecta 17 Su F W Sp 9 w. Calycina zero density