Systematics of Mimulus shevockii and relatives (Naomi Fraga, unpublished) & Pollination Biology of Mimulus shevockii (Naomi Fraga, unpublished)
Based on an September 2020 extract of the California Plant Rescue Database, California Botanic Garden holds 8 accessions of Erythranthe shevockii in orthodox seed collection. There are as many as 28640 seeds of this species in their collection - although some may have been used for curation testing or sent to back up.
Based on an August 2020 extract of the California Plant Rescue Database, California Botanic Garden has collected 8 seed accessions of Erythranthe shevockii from 5 plant occurrences listed in the California Natural Diversity Database. These collections together encompass 240 maternal plants
Endemic to the Kern River drainage in northeastern Kern County, California, at the junction of the southern Sierra Nevada Foothills and the western edge of the Mojave Desert. Approximately 8-9 occurrences are believed extant, 4-5 of which are on BLM land, 3 of which on both BLM and private land, and 1 of which is on private land. Plants on private land are threatened by residential development (subdivisions and mobile homes); at least one occurrence is also threatened by agricultural land conversion and fire suppression activities. Occurrences adjacent to developing areas may experience indirect impacts from activities such as road maintenance. Other threats include off-road vehicle use and competition from non-native species.
Habitat loss due to water inundation
There are currently 11 known occurrences of Mimulus shevockii.
Systematics of Mimulus shevockii and relatives (Naomi Fraga, unpublished)
Pollination Biology of Mimulus shevockii (Naomi Fraga, unpublished)
Currently, M. shevockii has monitoring and adaptive management prescriptions that are outlined in the West Mojave Plan (BLM 2005). Monitoring prescriptions are:
Continue surveys on public land identified as potential habitat. Document any spillover impacts to public lands from private lands.
BLM will make a determination of regional rangeland health standards on public lands in the Rudnick Common Allotment within five years of Plan approval.
Adaptive management prescriptions are:
Adjust boundaries of conservation area based on survey results.
Change route designation as necessary to protect occupied habitat.
Adjustments in grazing practices and Allotment Management Plans in Kelso Valley will be made as necessary based on results of the rangeland health determinations.
Pursue land purchase or exchange.
Fence BLM/private property boundaries if spillover impacts are evident.
Lands trusts such as the Kern River Preserve, Kern Valley Heritage Foundation, or the Mojave Desert Land Trust may also look into acquiring land that is currently zoned for development on which M. shevockii occurs.
Field surveys: Search potential habitat for additional populations.
Life history assessment: Study breeding systems, pollinators, and investigate germination requirements by conducting germination trials.
Genetic study: Investigate the genetic structure of the species.
Seeds from the Cyrus Canyon population have been secured for long term conservation; however seed collections from the southern populations near Kelso creek and Kelso Valley are needed.
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