Endemic to one island, 6-7 populations of 20 to several hundred plants total. Highly threatened by feral goats and pigs (info from early 1980s).
Competition and displacement from non-native plant species
Impacts from military training
Biological research activities on the island
Grazing by goats and pigs
This plant species is also considered seriously endangered by the California Na
Data from 1985-87 surveys for the San Clemente Island larkspur conducted by J. Mills and M. Beauchamp mapped 20 localities totaling an estimated 12,500 individuals*. CNDDB reports 13 presumed extant occurrences most all from same outdated data source, e.g. J. Mills, 1985-87.
In 2000 24 populations of the two insular endemic subspecies were documented and sampled by Dodd and Helenurm, 2002.
*Pers. Comm & Locality maps on file at RSABG.
Recent and ongoing research has been performed on Delphinium variegatum and its three subspecies (ssp. variegatum, ssp. kinkiense, ssp. thornei). Research includes floral variation and genetic diversity. (Dodd and Helenurm 2000, 2002)
The U.S. Navy has jurisdiction over San Clemente Island, has an ongoing program to remove feral goats and pigs in an effort to restore the native vegetation. (CDFG 2002)
For more information contact:
Natural Resources Office, Building 3
Navy Region Southwest (Code N4515)
San Diego, CA 92135-7088
Population surveys, assessments, and updating this information into the California Natural Diversity Data Base records (CNDDB) should be initiated.
Continued manage of exotic plant species
Seed banking and germination studies
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