San Diego Management & Monitoring Program


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Thread-leaved brodiaea Brodiaea filifolia

Goal: Maintain or enhance existing Thread-leaved brodiaea 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 grassland and vernal pool vegetation communities.

NFO 2017 SS

MON-RES-SPEC BROFIL-3

Management units: 6, 7, 8

In 2017, continue field research into soils and habitat relationships and development of habitat suitability and climate change models for thread-leaved brodiaea and other edaphic endemic plants to better understand habitat requirements and to identify and prioritize geographic areas important for connectivity, restoration, and range shifts due to climate change and other threats.
Action Statement Action status Projects
RES-1 Test soils at potential expansion sites and compare to occupied reference sites to determine site suitability based on soils. In progress Enhancing the Resilience of Edaphic Endemic Plants
RES-2 Prepare habitat suitability models under current environmental conditions and for different scenarios of climate change to delineate potential future habitat. In progress Enhancing the Resilience of Edaphic Endemic Plants
RES-3 Collect covariate data on vegetation composition and cover (alliance and association-level mapping), soils, invasive plants and other threats for selected populations. In progress Enhancing the Resilience of Edaphic Endemic Plants
RES-4 Prioritize locations for conservation, management, and future surveys based on predicted distributions and environmental correlates. In progress Enhancing the Resilience of Edaphic Endemic Plants
RES-5 Submit project metadata, monitoring data and report to MSP web portal. In progress Enhancing the Resilience of Edaphic Endemic Plants
Criteria Deadline year
Refined Models and Prioritized Future Survey Locations for thread-leaved brodiaea by 2018 2021
Code Obj. code Statement
BROFIL-5 MGT-PRP-MGTPL In 2020, begin preparing a section for thread-leaved brodiaea in the MSP Rare Plant Management Plan that prioritizes management actions to maintain and expand conserved occurrences (see occurrence table) based upon an assessment of data on occurrence status, habitat and threats. Prioritize management recommendations for re-establishment of historic occurrences or establishment of new occurrences in suitable habitat, as needed, to achieve at least 4 occurrences with self-sustaining populations on Conserved Lands. Minimum criteria for enhancement are to reduce invasive annual nonnative plants and thatch to less than 20% absolute cover within the occurrence.