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    Functional morphology underlies performance differences among invasive and non-invasive ruderal Rubus species

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    https://link.springer.com/article/10.1007%2Fs00442-013-2639-2
    Permanent Link
    http://hdl.handle.net/11603/7801
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    • UMBC Faculty Collection
    • UMBC Geography and Environmental Systems Department
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    Author/Creator
    Caplan, Joshua S.
    Yeakley, J. Alan
    Date
    2013
    Type of Work
    12 pages
    Text
    journal articles
    Citation of Original Publication
    Joshua S. Caplan and J. Alan Yeakley. "Functional Morphology Underlies Performance Differences Among Invasive and Non-Invasive Ruderal Rubus Species" Oecologia Vol. 173 Iss. 2 (2013)
    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
    invasiveness
    water relations
    fluctuating resources
    growth allocation
    rubus fruticosus
    Abstract
    The ability of some introduced plant species to outperform native species under altered resource conditions makes them highly productive in ecosystems with surplus resources. However, ruderal native species are also productive when resources are available. The differences in abundance among invasive and non-invasive ruderal plants may be related to differences in ability to maintain access to or store resources for continual use. For a group of ruderal species in the Pacific Northwest of North America (invasive Rubus armeniacus; non-invasive R. ursinus, R. parviflorus, R. spectabilis, and Rosa nutkana), we sought to determine whether differences in functional morphological traits, especially metrics of water access and storage, were consistent with differences in water conductance and growth rate. We also investigated the changes in these traits in response to abundant vs. limited water availability. Rubus armeniacus had among the largest root systems and cane cross-sectional areas, the lowest cane tissue densities, and the most plastic ratios of leaf area to plant mass and of xylem area to leaf area, often sharing its rank with R. ursinus or Rosa nutkana. These three species had the highest water conductance and relative growth rates, though Rubus armeniacus grew the most rapidly when water was not limited. Our results suggest that water access and storage abilities vary with morphology among the ruderal species investigated, and that these abilities, in combination, are greatest in the invasive. In turn, functional morphological traits allow R. armeniacus to maintain rapid gas exchange rates during the dry summers in its invaded range, conferring on it high productivity.


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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.