San Diego Management & Monitoring Program


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San Diego ambrosia Ambrosia pumila

Goal: Maintain or enhance existing San Diego ambrosia occurrences to ensure multiple conserved occurrences with self sustaining populations to increase resilience to environmental and demographic stochasticity, maintain genetic diversity, and ensure persistence over the long term (>100 years) in chaparral vegetation communities.

regional and/or local NFO 2017, 2018, 2019, 2020, 2021 SO

MON-IMP-IMG AMBPUM-1

Management units: 3, 4, 6, 8

Beginning in 2017, annually inspect San Diego ambrosia occurrences on Conserved Lands in (see occurrence table) using the regional rare plant IMG monitoring protocol to record abundance and collect habitat and threats covariate data to determine management needs.
Action Statement Action status Projects
IMP-1 Based upon occurrence status and threats, determine management needs including whether routine management or more intensive management is warranted. some occurrences are in progress
IMP-2 Submit project metadata, monitoring datasets and management recommendations to the MSP Web Portal. some occurrences are in progress
Criteria Deadline year
Surveys Completed Annually with Management Recommendations 2021
Code Obj. code Statement
AMBPUM-2 MGT-IMP-IMG Beginning in 2017, conduct routine management actions identified through the IMG monitoring at San Diego ambrosia occurrences on Conserved Lands in (see occurrence table). Depending on the type and level of threat, management should only be conducted as needed, not necessarily every year, and using BMPs with precautions to do no harm.
AMBPUM-2 MGT-IMP-IMG Beginning in 2017, conduct routine management actions identified through the IMG monitoring at San Diego ambrosia occurrences on Conserved Lands in (see occurrence table). Depending on the type and level of threat, management should only be conducted as needed, not necessarily every year, and using BMPs with precautions to do no harm.
AMBPUM-3 MGT-PRP-MGTPL In 2020, begin preparing a section for San Diego ambrosia in the MSP Rare Plant Management Plan that prioritizes management actions to maintain large occurrences and expand at least 3 small occurrences on Conserved Lands (see occurrence table) based upon an assessment of data on occurrence status, habitat, threats, genetic data, and results of existing restoration efforts. Minimum criteria for enhancement are to reduce invasive annual nonnative plants and thatch to less than 20% absolute cover within the occurrence.
AMBPUM-6 MGT-PRP-SBPL In 2020, begin preparing a section for San Diego Ambrosia in the MSP Seed Collection, Banking and Bulking Plan to preserve genetic diversity and rescue occurrences in case of catastrophic disturbance. The plan should incorporate best science and management practices (e.g., Wall 2009, KEW 2016) and provide guidelines for collecting and storing seeds over the long term at a permanent, established conservation seed bank (e.g., Institute for Conservation Research Native Plant Seed Bank, Rancho Santa Ana Botanic Garden Seed Conservation Program) and for providing a source of seeds for management purposes. The plan should include recommendations for: collecting and storing seeds for conservation banking; management oriented research; rescuing occurrences after catastrophic disturbances; and seed bulking and out-planting to augment extant occurrences or to establish new occurrences with consideration of genetic implications for population sustainability.
local NFO 2017, 2018, 2019, 2020, 2021 SO

MGT-IMP-IMG AMBPUM-2

Management units: 3, 4, 6, 8

Beginning in 2017, conduct routine management actions identified through the IMG monitoring at San Diego ambrosia occurrences on Conserved Lands in (see occurrence table). Depending on the type and level of threat, management should only be conducted as needed, not necessarily every year, and using BMPs with precautions to do no harm.
Action Statement Action status Projects
IMP-1 Perform routine management activities such as protecting occurrences from disturbance through fencing, signage, and enforcement. available for implementation
IMP-1 Perform routine management activities such as protecting occurrences from disturbance through fencing, signage, and enforcement. available for implementation
IMP-2 Submit project metadata and management data to the MSP Web Portal.
Criteria Deadline year
Routine Management Completed as Needed Based Upon Monitoring Recommendations 2021
Code Obj. code Statement
AMBPUM-1 MON-IMP-IMG Beginning in 2017, annually inspect San Diego ambrosia occurrences on Conserved Lands in (see occurrence table) using the regional rare plant IMG monitoring protocol to record abundance and collect habitat and threats covariate data to determine management needs.
AMBPUM-3 MGT-PRP-MGTPL In 2020, begin preparing a section for San Diego ambrosia in the MSP Rare Plant Management Plan that prioritizes management actions to maintain large occurrences and expand at least 3 small occurrences on Conserved Lands (see occurrence table) based upon an assessment of data on occurrence status, habitat, threats, genetic data, and results of existing restoration efforts. Minimum criteria for enhancement are to reduce invasive annual nonnative plants and thatch to less than 20% absolute cover within the occurrence.