Photo Credit: City of San Diego
Photo Credit: Jessie Vinje
Photo Credit: Jessie Vinje
| Historically present | |
| Currently present | |
| Currently not detected |
Goal: Maintain or enhance existing Blochman's dudleya occurrences and re-establish historic occurrences, as needed, 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 coastal sage scrub vegetation communities.
Management units: 1, 6
From 2017-2021, inspect Blochman's dudleya occurrences annually on Conserved Lands (see occurrence table) using the IMG regional 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. | in progress | |
| IMP-2 | Submit project metadata, monitoring datasets and management recommendations to the MSP Web Portal. | in progress |
| Criteria | Deadline year |
|---|---|
| Annual Surveys Completed with Management Recommendations | 2021 |
| Threat Name | Threat Code |
|---|---|
| Human uses of the Preserves | HUMUSE |
| Invasive plants | INVPLA |
| Loss of connectivity | LOSCON |
| Urban development | URBDEV |
Management units: 1, 6
Beginning in 2017, conduct routine management actions identified through the IMG monitoring at Blochman's dudleya occurrences on Conserved Lands (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 as needed, such as protecting occurrences from disturbance through enforcement and controlling invasive non-native plant species to =20% absolute cover. | available for implementation | |
| IMP-2 | Submit project metadata and management data to the MSP Web Portal. | available for implementation |
| Criteria | Deadline year |
|---|---|
| Routine Management Completed as Needed Based Upon Monitoring Recommendations | 2021 |
| Threat Name | Threat Code |
|---|---|
| Human uses of the Preserves | HUMUSE |
| Invasive plants | INVPLA |
| Loss of connectivity | LOSCON |
| Urban development | URBDEV |
Management units: 1, 2, 6, 7
In 2019, survey historic Blochman's dudleya locations to determine occurrence status; survey and delineate potentially suitable habitat for new occurrences; survey existing occurrences to identify the potential for enhancement and expansion; and at all sites collect data on occurrence status, habitat and threats and determine management needs.
| Action | Statement | Action status | Projects |
|---|---|---|---|
| SURV-1 | At each extant occurrence, map the extent of the occurrence, collect data on abundance, map adjacent suitable habitat for potential occurrence expansion, collect covariate data on threats including estimates of cover of invasive non-native plants and trampling. | On hold | |
| SURV-2 | Submit project metadata, habitat mapping, and a report with site prioritizations and recommendations for management based upon occurrence status, habitat and threats assessments to the MSP Web Portal. | On hold |
| Criteria | Deadline year |
|---|---|
| Surveys and Report Completed by 2020 | 2021 |
| Threat Name | Threat Code |
|---|---|
| Human uses of the Preserves | HUMUSE |
| Invasive plants | INVPLA |
| Loss of connectivity | LOSCON |
| Urban development | URBDEV |
Management units: 1, 2, 6, 7
In 2021, begin preparing a section for Blochman's dudleya in the MSP Seed Collection, Banking and Bulking Plant 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.
| Action | Statement | Action status | Projects |
|---|---|---|---|
| PRP-1 | Consult the San Diego County Rare Plant Working Group made up of plant ecologists, geneticists, rare plant experts, land managers, restoration practitioners, seed banking and bulking practitioners, wildlife agencies, and other stakeholders to provide input and recommendations for the Blochman's dudleya section in the MSP Seed Collection, Banking and Bulking Plan. | some occurrences are in progress | |
| PRP-2 | Prepare a seed collection plan to collect seeds over multiple years, collect seeds several times within a season, accumulate seeds across populations, and to sample among habitats and ecological niches. Include guidelines for collecting and storing seeds along maternal lines from small occurrences (<1,000 plants) and to provide propagules to be used in management experiments, enhancement of existing occurrences, and establishment of new occurrences. | some occurrences are in progress | |
| PRP-3 | The seed collection plan should include guidelines for collecting seeds from occurrences of sufficient size to accommodate harvest and based on genetic studies as available. Include provisions for collecting seed from unconserved populations planned for development. | some occurrences are in progress | |
| PRP-4 | Include protocols and guidelines for collecting voucher specimens and submitting to the San Diego Natural History Museum (McEachern et al. 2007). | some occurrences are in progress | |
| PRP-5 | Include guidelines for testing seeds for viability and to obtain information on dormancy and germination rates. | some occurrences are in progress | |
| PRP-6 | Submit project metadata and MSP Seed Collection, Banking and Bulking Plan to the MSP Web Portal. | some occurrences are in progress |
| Criteria | Deadline year |
|---|---|
| By 2022, Completed Blochman's Dudleya Section in MSP Seed Collection, Banking and Bulking Plan | 2021 |
| Threat Name | Threat Code |
|---|---|
| Human uses of the Preserves | HUMUSE |
| Invasive plants | INVPLA |
| Loss of connectivity | LOSCON |
| Urban development | URBDEV |
Management units: 1, 2, 6, 7
In 2021, begin preparing a section for Blochman's dudleya in the MSP Rare Plant Management Plan that prioritizes management actions to maintain or expand conserved occurrences based upon an assessment of data on occurrence status habitat and threats. Minimum criteria for enhancement are to reduce invasive annual nonnative plants and thatch to at least 20% absolute cover within the occurrence
| Action | Statement | Action status | Projects |
|---|---|---|---|
| PRP-1 | Consult the San Diego County Rare Plant Working Group made up of plant ecologists, geneticists, rare plant experts, land managers, restoration practitioners, seed banking and bulking practitioners, wildlife agencies, and other stakeholders to provide input and recommendations for Blochman's dudleya in the MSP Rare Plant Management Plan. | waiting for precedent action | |
| PRP-2 | Develop a conceptual model that identifies management actions to effectively reduce threats to Blochman's dudleya populations. | waiting for precedent action | |
| PRP-3 | Use occurrence status and threats data to develop management recommendations to reduce threats and promote resilience of occurrences. | waiting for precedent action | |
| PRP-4 | Develop an implementation plan for Blochman's dudleya that prioritizes management actions for the next 5 years and details tasks, lead entities, responsibilities, and timelines, budgets. | waiting for precedent action | |
| PRP-5 | Submit project metadata, project datasets, and MSP Rare Plant Management Plan to the MSP Web Portal. | waiting for precedent action |
| Criteria | Deadline year |
|---|---|
| By 2022, Completed Blochman's Dudleya Section in MSP Rare Plant Management Plan | 2021 |
| Threat Name | Threat Code |
|---|---|
| Human uses of the Preserves | HUMUSE |
| Invasive plants | INVPLA |
| Loss of connectivity | LOSCON |
| Urban development | URBDEV |
|
Rare Plant Inspect and Manage Monitoring 2014-2026
From 2014-2026, a Management and Monitoring Strategic Plan (MSP Roadmap) monitoring objective for 30 rare plant species is to inspect occurrences to determine management needs. The inspect and manage (IMG) objective is implemented to document the status of rare plant occurrences and assess habitats and threats to develop specific management recommendations. IMG monitoring is implemented by a combination of land managers and contracted biologists in coordination with the SDMMP. Available rare plant data is posted below. New annual updates are typically posted in March. Based upon an evaluation of these data, a 2014-2026 monitoring schedule has been developed for the 30 rare plant species (attached below). Coordinating data collection across the region allows analyses of species and population trends over time and provides a better understanding of the association between habitat and threat covariates and population dynamics.
|
| File name | Lead Author | Year | Type |
|---|---|---|---|
| Attracting Pollinators to Restoration Sites | Dodero, Mark | 2019 | powerpoint presentation |
| Management Strategic Plan (MSP) 2014 Monitoring Protocol for Rare Plant Occurrences on Conserved Lands in Western San Diego County | San Diego Management and Monitoring Program | 2014 | report |
| Management Strategic Plan (MSP) 2015 Monitoring Protocol for Rare Plant Occurrences on Conserved Lands in Western San Diego County | San Diego Management and Monitoring Program | 2015 | report |
From the central coast of California to southern San Diego, and into northern Baja California, Mexico [1, 2, 3].
Three occurrences on Conserved Lands in MUs 3 (Border Field State Park) and 6 (Carlsbad Oaks North Habitat Conservation Area).
None [3].
Rocky, often clay or serpentine soils [3]. Primary habitat associations are coastal bluff scrub, chaparral, coastal scrub, and valley and foothill grassland. Elevation range is 5-450 meters.
Crassulaceae family [3]. Northern and southern populations are genetically distinct.
Herbaceous perennial [3].
Bloom period is April-June [2].
Threatened by grazing, trampling, development, erosion, and non-native plants [3].
Hybrids with Dudleya edulis suspected [2].
[1] Â McCabe, S. W. 2016. Dudleya blochmaniae subsp. Blochmaniae, in Jepson Flor Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgibin/get_IJM.pl?tid=50229, accessed on August 31, 2016.
[2] “Dudleya Blochmaniae.†2016. Calflora. http://www.calflora.org/cgi-bin/species_query.cgi?where-taxon=Dudleya+blochmaniae.
[3] CNPS, Rare Plant Program. 2016. Inventory of Rare and Endangered Plants (online edition, v8-02). California Native Plant Society, Sacramento, CA. http://www.rareplants.cnps.org, accessed 31 August 2016.