Goal: Protect, enhance, and restore vernal pool habitat on Conserved Lands in the MSPA that supports or has the potential to support VF and SL species (i.e., California Orcutt grass, Otay mesa mint, San Diego button-celery, San Diego mesa mint, spreading navarretia, Riverside fairy shrimp, San Diego fairy shrimp, and western spadefoot) so that the vegetation community has high ecological integrity, and these species are resilient to environmental stochasticity and threats, such as altered hydrology, climate change and invasive plants, and will be likely to persist over the long term (>100 years).
Management units: 2, 3, 6
Beginning in 2018, conduct annual surveys for spreading navarretia in occupied, historically occupied and potentially suitable vernal pools to determine cover clases in each basin and cover of each nonnative species using a standardize protocol as defined in the VPMMP (City of San Diego 2015). Nonnative cover classes will be combined to determine if management triggers for Level 1, 2 or 3 management are met. Management recommendations will be made, noting individual nonnative species that pose a threat to direct specific management actions. Management actions will be implemented annually as part of the general vernal pool habitat management objectives for different management levels (ML1, ML2, ML3).
|IMP-1||Submit project metadata, monitoring datasets and management recommendations to the MSP Web Portal.||On hold|
|Annual Surveys Completed with Management Recommendations||2021|
Proctor Valley Vernal Pools and Uplands Habitat Restoration Project
The Proctor Valley Vernal Pool and Uplands Habitat Restoration Project will complete restoration of 19 acres of vernal pools and coastal sage scrub in Proctor Valley on the City of San Diego's Otay Lakes Cornerstone Lands, a biological core area under the San Diego MSCP. The Project includes restoration of vernal pools and coastal sage scrub habitat and establishment of occurrences of two high-priority Management Strategic Plan (MSP) plants with seed collection, seed bulking, propagation, planting and seeding, and maintenance. The Project also includes restoration of habitat specific to the needs of several MSP animal species through seeding and planting of host and nest plants, construction of artificial burrows, and other measures. Project partially funded by SANDAG TransNet EMP Land Management Grant #5001972 and #5004955.
|File name||Lead Author||Year||Type|
|City of San Diego Vernal Pool And Quino Habitat Restoration Project Implementation Report||2010||report|
|County of San Diego MSCP Monitoring Summary Report January 1998 - June 2007||County of San Diego||2007||report|
|FINAL HABITAT MANAGEMENT PLAN for Starwood - Santa Fe Valley SECOND AMENDMENT||2000||report|
|Final Report: Vernal Pool Habitat Restoration at Otay Mesa Open Space||2020||report|
|Management Plan for "S" Series Vernal Pools on San Diego National Wildlife Refuge||Martin, John||2006||report|
|MSP Roadmap Dec 31, 2016: VF Species and Vegetation Goals, Objectives, and Actions||San Diego Management and Monitoring Program||2016||other|
|Restoration of the S-series Vernal Pools on the Shinohara Parcel of San Diego National Wildlife Refuge||Martin, John; Terp, Jill||2014||report|
|Revised Final City of San Diego Vernal Pool Habitat Conservation Plan Management and Monitoring Plan||2020||report|
|Summary Results of Rare Plant Field Monitoring City of San Diego MSCP||2009||fact sheet|
|Vernal Pool And Quino Habitat Restoration Project Implementation Report||2010||report|
|Vernal Pool Management and Monitoring 2019||Berninger, Mark||2019||powerpoint presentation|
|Vernal Pool Restoration Final Report||2018||report|
|Weed Control on the Vernal Pool Restoration Areas of the San Diego National Wildlife Refuge: Jamul, California||2013||report|
Northwestern Los Angeles County to western Riverside County, and coastal San Diego County in California, to San Quintin in northwestern Baja California, Mexico . Fewer than 30 populations are known to exist in the U.S. and nearly 60 percent are concentrated in three locations in southern California: Otay Mesa in southern San Diego County, along the San Jacinto River, and in Hemet, Riverside County .
Within the MSPA it is known from MU3 (Otay Mesa), MU4 (MCAS Miramar), MU5 (Ramona), MU6 (San Marcos), MU7 (Del Mar), and MU8 (Marine Corps Base Camp Pendleton) .
Vernal pools in San Diego, in man-made depressions and ditches that have the same hydrological dynamics as vernal pools; alkali playa habitat elsewhere in range (Riverside County) .
Polemoniaceae (Phlox family) . First described by Reid Moran in 1977 based on collection made in 1969 in northwestern Baja California, Mexico . The similar Navarretia prostrata can occur in similar habitats but is distinguished by flower and calyx differences, and pollen grain surfaces. Chromosomes: 2n=18 .
Low, spreading or ascending, annual herb 4-6 inches tall . The lower portions of stems are mostly hairless (glabrous), leaves are 1 to 5 cm long and finely divided into linear segments and slender spine-tipped lobes .
Blooms April- June when vernal pools are devoid of standing water . The small flowers are white to pale lavender with linear petals, and borne in small, flat-topped, leafy clusters .
Germinates from seeds left in the seed bank, produces fruit, dries out, and senesces in the hot, dry summer months . The fruit is an ovoid, two-chambered capsule covered by a viscous layer that becomes sticky when moistened . The seed can stick to an animal or bird visiting the vernal pool . There is evidence that there is a low pollen to ovule ratio suggesting frequent self-pollination however, it is not considered an obligate self-pollinator because this species can also outcross to other plants . Hypothetically, insects would be the main pollinators of the flowers . The Hymenopteran insect Perdita navarretiae (a type of mining bee in the Andrenidae family) has been documented to make repeated visits to N. fossalis, possibly for pollination.
Threatened by loss of habitat through development, urbanization, habitat fragmentation, grazing, agriculture, watershed alteration (drainage pattern), and invasive nonnative plants . Detrimental edge effects including recreational activities, foot traffic, and off-road vehicles.
As an obligate wetland species, Navarretia fossalis depends on compatible, seasonal inundation and is vulnerable to changes in water levels and periods of inundation . Abundance varies year to year depending on precipitation and the inundation/drying time of the vernal pool. This makes it difficult to obtain an accurate count of the number of individuals in a population because the ratio of standing plants to remaining seeds in the seed bank that makes up the population cannot be visually measured. Modifications to the uplands surrounding a vernal pool can negatively affect the pool’s hydrology, even if such modifications occur outside the pool’s surface watershed. Disturbance may also allow invasive plants or non-vernal pool species to occupy the pools and compete with vernal pool plant species and may also alter the composition of native species of a vernal pool .
 California Native Plant Society Rare Plant Program. 2016. Inventory of Rare and Endangered Plants (online edition, v8-02). California Native Plant Society, Sacramento, CA. Available: http://www.rareplants.cnps.org. Accessed November 8, 2016.
 U.S. Fish and Wildlife Service. 2009. Navarretia fossalis (Spreading navarretia) 5-Year Review: Summary and Evaluation. Carlsbad, CA.
 Bauder, E.T., and S. McMillian. 1998. Current Distribution and Historical Extent of Vernal Pools in Southern California. Pages 56-70 in C.W. Witham, E.T. Bauder, D. Belk, W. Ferren and R. Ornduff (editors), Ecology, conservation, and management of vernal pool ecosystems: proceedings from a 1996 conference. California Native Plant Society, Sacramento, CA.
 MSP-MOM. 2014. Management Strategic Plan Master Occurrence Matrix. San Diego, CA. Available: http://sdmmp.com/reports_and_products/Reports_Products_MainPage.aspx
 U.S. Fish and Wildlife Service. 1998. Determination of Endangered Status for Four Southwestern California Plants from Vernal Pool Wetlands and Clay Soils . Federal Register 63: 54975-54994.
 Day, A.G. 1993. The Jepson Manual: Higher Plants of California, Navarretia, ed. J.C. Hickman, 844-851. Berkeley: University of California Press.
 U.S. Fish and Wildlife Service. 1998. Recovery Plan for Vernal Pools of Southern California. Portland, OR.
 Leigh A. Johnson 2017. Navarretia fossalis, in Jepson Flora Project (eds.) Jepson eFlora. Available: http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=34450. Accessed on November 08, 2016.
 Sorensen, A. E. 1986. Seed Dispersal by Adhesion. Annual Review of Ecological Systems 17: 443-463.
 Spencer, S.C. and L.H. Rieseberg. 1998. Evolution of Amphibious Vernal Pool Specialist Annuals: Putative Vernal Pool Adaptive Traits in Navarretia (Polemoniaceae). ed. C. W. Witham et al., 76-85, Ecology, conservation and management of vernal pool ecosystems – proceedings from a 1996 conference. California Native Plant Society, Sacramento, CA.
 Thorp, R.W. and J.M. Leong. 1998. Specialist Bee Pollinators of Showy Vernal Pool Flowers. ed. C.W. Witham, E.T. Bauder, D. Belk, W.R. Ferren Jr., and R. Ornduff, 169-179, Ecology, conservation and management of vernal pool ecosystems – proceedings from a 1996 conference. California Native Plant Society, Sacramento, CA.
 Bauder, E.T. 1986. San Diego Vernal Pools: Recent and Projected Losses, Their Condition, and Threats to Their Existence. Prepared for Endangered Plant Project, California Department of Fish and Game, Sacramento, CA.