• Login
    View Item 
    •   Oxy Scholar Home
    • Bulletin of the Southern California Academy of Sciences
    • Bulletin of the Southern California Academy of Sciences
    • View Item
    •   Oxy Scholar Home
    • Bulletin of the Southern California Academy of Sciences
    • Bulletin of the Southern California Academy of Sciences
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Decline to Near Extinction of the Endangered Scotts Valley Polygonum Polygonum hickmanii (Polygonaceae) in Coastal Central California

    Thumbnail
    View/Open
    BSCAS_Kofron_et_al_Decline_to_near_extinction_Scotts_Valley_polygonum_8_JUL_2013.docx (2.539Mb)
    i0038_3872_112_3_185.pdf (2.282Mb)
    Subject
    California; endangered species; Polygonum hickmanii; Santa Cruz County; Scotts Valley polygonum
    Author
    Kofron, Christopher P.; Lyons, Kathleen; Morgan, Randall
    Journal Title
    Scas: Bulletin of the Southern California Academy of Sciences
    Volume
    112
    Issue
    scas/vol112/iss3; 3
    Metadata
    Show full item record
    URI
    https://scholar.oxy.edu/handle/20.500.12711/9173
    Abstract
    Scotts Valley polygonum Polygonum hickmanii (Polygonaceae) is a narrow endemic plant restricted to a specialized microhabitat (exposed bedrock in California prairie) in Santa Cruz County, California. The species was named in 1995 and subsequently listed as endangered under the U.S. Endangered Species Act and California Endangered Species Act in 2003 and 2005, respectively. Two occurrences exist on three properties in a recently urbanized area at the northern edge of the city of Scotts Valley, with a geographic range of 0.03 km<sup>2</sup>. As of 2012 the species has declined to 128 plants on 61 m<sup>2</sup>, having decreased from 604 plants in 2003, 1,612 plants in 1998 and 2,388 plants in 1997. In 2013 the primary threats to P. hickmanii are habitat alteration due to adjacent land uses and developments, and invasive plant species and accumulation of thatch. Cessation of grazing and fire suppression have likely contributed to the increasing presence of invasive plant species and accumulation of thatch. Intensive and adaptive management with monitoring will be necessary for P. hickmanii to survive. Unless management is implemented as a matter of urgency, the species will likely disappear within just a few years.
    Collections
    • Bulletin of the Southern California Academy of Sciences

    Browse

    All of Oxy ScholarCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsJournal TitleJournal IssueThis CollectionBy Issue DateAuthorsTitlesSubjectsJournal TitleJournal Issue

    My Account

    LoginRegister

    DSpace software copyright © 2002-2021  DuraSpace
    Contact Us | Send Feedback
    DSpace Express is a service operated by 
    Atmire NV