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    Water Relations Advantages for Invasive Rubus Armeniacus Over Two Native Ruderal Congeners

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    https://link.springer.com/content/pdf/10.1007%2Fs11258-010-9747-4.pdf
    Permanent Link
    http://hdl.handle.net/11603/7803
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    • UMBC Geography and Environmental Systems Department
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    Author/Creator
    Caplan, Joshua S.
    Yeakley, J. Alan
    Date
    2010
    Type of Work
    11 pages
    Text
    journal articles
    Citation of Original Publication
    Joshua S. Caplan and J. Alan Yeakley. "Water Relations Advantages for Invasive Rubus Armeniacus Over Two Native Ruderal Congeners" Plant Ecology Vol. 210 Iss. 1 (2010)
    Rights
    This item may be protected under Title 17 of the U.S. Copyright Law. It is made available by UMBC for non-commercial research and education. For permission to publish or reproduce, please contact the author.
    Subjects
    Biological invasion
    Ecophysiology
    Pacific Northwest
    plant invasiveness
    rubus discolor
    rubus procerus
    Abstract
    Despite species in the Rubus fruticosus complex (wild blackberry) being among the most invasive plants globally in regions with large annual fluctuations in water availability, little is known about their water relations. We compared water relations of a prominent member of the complex, R. armeniacus (Himalayan blackberry), with species native to the Pacific Northwest of North America (PNW), R. spectabilis (salmonberry) and R. parviflorus (thimbleberry). In eight stands of each species located near Portland, Oregon, USA, we measured mid-day hydraulic resistance (R plant), and daily time series of stomatal conductance (g s), leaf water potential (Ψlf), and environmental conditions at four time periods spanning the 2007 growing season. Although all species maintained Ψlf above −0.5 MPa in spring, R. armeniacus maintained less negative Ψlf (≥−1.0 MPa) than the natives in summer, a factor attributable to advantages in both its root and shoot systems. R plant of R. armeniacus was ≤0.1 MPa mmol−1 m2 s for the duration of the study, and approximately 25–50% of R plant for the native species in summer. R. armeniacus had higher g s compared to the native species throughout the spring and summer, with approximately twice their rates in summer. Our R plant and g s results show that R. armeniacus has access to more water during PNW summers than congeneric natives, allowing it to maintain high water-use, and potentially helping it achieve higher growth and reproductive rates. Water relations may therefore be a critical component of the competitive and invasive success of R. armeniacus and other R. fruticosus species worldwide.


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    Albin O. Kuhn Library & Gallery
    University of Maryland, Baltimore County
    1000 Hilltop Circle
    Baltimore, MD 21250
    www.umbc.edu/scholarworks

    Contact information:
    Email: scholarworks-group@umbc.edu
    Phone: 410-455-3021


    If you wish to submit a copyright complaint or withdrawal request, please email mdsoar-help@umd.edu.