CPC National Collection Plant Profile
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Cercocarpus traskiae
Family: |
Rosaceae |
Common Names: |
Catalina mountain-mahogany, Santa Catalina Mountain-mahogany |
Author: |
Eastw. |
Growth Habit: |
Tree, Shrub |
CPC
Number: |
872 |
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Primary
custodian for this plant in the CPC National Collection of Endangered
Plants is: |
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Cercocarpus traskiae
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The Catalina Island mountain mahogany is considered to be one of the rarest shrubs in the continental United States. It has been rare as long as its existence has been known. This tree was first discovered in 1897 when there was a single population of forty individuals. Now there are only seven individuals remaining. The loss has been attributed to foraging by feral animals on the island. The Santa Catalina Conservancy has taken measures to protect the few remaining individuals, but there are still threats to their continued survival.
This evergreen shrub is a member of the rose family, producing flowers that lack petals from March to May.
Distribution
& Occurrence |
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State Range
Habitat
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The slopes of a steep-sided, narrow, dry arroyo in a coastal sage scrub community with sausserite gabbro soils. |
Distribution
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A single population in an arroyo on Santa Catalina Island. |
Number Left
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This species lives in a single gully on California's Santa Catalina Island. Only seven adult trees remain. (CDFG 2002) |
State/Area
Protection
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State/Area |
Rank |
Status |
Date |
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California |
S1.1 |
1 |
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Conservation,
Ecology & Research |
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Ecological
Relationships
Threats
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• Habitat disturbance
• Hybridization with common relatives
• Feral animals
(USFWS 1997) |
Current Research Summary
Current Management Summary
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The Santa Catalina Island Conservancy owns all of the habitat that this species occupies, and has been managing it since 1988, when they first fenced the remaining individuals to protect them from browsing animals. (CDFG 2002; USFWS 1997) |
Research Management Needs
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• Reintroduction efforts to suitable habitat on the island are necessary to ensure the stability of the species.
• Genetic analysis to determine the threats to the species via inbreeding depression as well as hybridization with the common island mountain mahogany. |
Ex Situ Needs
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Books (Sections)
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Kartesz, J.T. 1999. A synonymized checklist of the vascular flora of the U.S., Canada, and Greenland. In: Kartesz, J.T.; Meacham, C.A., editors. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden. Chapel Hill, NC.
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Books (Edited Volumes)
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James C. Hickman, Editor. 1993 The Jepson manual: Higher plants of California. Berkeley: University of California Press. 1400p.
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Electronic Sources
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CDFG. (2002). California's Plants and Animals, Threatened and Endangered Plants. List and Species Accounts. California Department of Fish and Game, Habitat Conservation Planning Branch. http://www.dfg.ca.gov/hcpb/species/t_e_spp/teplant/teplanta.shtml. Accessed: 2002.
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Journal Articles
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Blaney, C. 1995. Crossing the Lines to Extinction. BioScience. 45, 11: 744-745.
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Rieseberg, L.H.; Gerber, D. 1995. Hybridization in the Catalina Island Mountain Mahogany (Cercocarpus traskiae)-RAPD Evidence. Conservation Biology. 9, 1: 199-203.
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Rieseberg, L.H.; Zona, S.; Aberbom, L.; Martin, T.D. 1989. Hybridization in the island endemic Catalina mahogany. Conservation Biology. 3, 1: 52-58.
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Thorne, R.F. 1967. A flora of Santa Catalina Island, California. Aliso. 6, 3: 1-77.
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Umemoto, E. 1994. Catalina Island Mountain Mahogany and Alameda Manzanita--Endangered Species at the Garden. University of California Botanical Garden Newsletter. 19, 4
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USFWS. 1995. Proposed rule to list three plants from the Channel Islands of southern California as endangered. Federal Register. 60, 142: 37987-37993.
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USFWS. 1997. Determination of endangered status for three plants from the Channel Islands of southern California. Federal Register. 62, 153: 42692-42702.
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Reports
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Little, E.L., Jr. 1979. Checklist of United States trees (native and naturalized): Agriculture Handbook No. 541. Washington, D.C.: U.S. Forest Service. p.375.
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This
profile was updated on 3/4/2010 |
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