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    • Rangeland Ecology & Management, Volume 66 (2013)
    • Rangeland Ecology & Management, Volume 66, Number 1 (January 2013)
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    Saw Palmetto (Serenoa repens) Flowering and Fruiting Response to Time Since Fire

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    Author
    Carrington, Mary E.
    Mullahey, J. Jeffrey
    Issue Date
    2013-01-01
    Keywords
    ecosystem management
    fire
    flatwoods
    Florida
    forest management
    plant ecology
    
    Metadata
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    Citation
    Carrington, M. E., & Mullahey, J. J. (2013). Saw palmetto (Serenoa repens) flowering and fruiting response to time since fire. Rangeland Ecology & Management, 66(1), 43-50.
    Publisher
    Society for Range Management
    Journal
    Rangeland Ecology & Management
    URI
    http://hdl.handle.net/10150/642685
    DOI
    10.2111/REM-D-11-00183.1
    Additional Links
    https://rangelands.org/
    Abstract
    Saw palmetto (Serenoa repens [Bartr.] Small) is a shrubby palm common in southeastern US pine flatwoods ecosystems. Demand recently has increased for fruits for the herbal remedies market. Because only wild saw palmettos are harvested, management strategies are needed to promote flowering and fruiting. This study investigated effects of time since growing season (April-July) fires on flowering and fruiting of saw palmetto ramets 54 cm in height, in 18 pine flatwoods or dry prairie sites (six sites in three locations, burned in 1996, 1995, 1994, 1993, 1992, or before 1991) in central and southwest Florida from 1996 to 1999. We used repeated measures, linear mixed models to test for time since fire effects on proportion of ramets flowering, proportionof ramets fruiting, and fruit yield. Ranges of means among sites over all years of the study for proportion of ramets flowering, proportion of ramets fruiting, and fruit yield were 0 to 0.78, 0 to 0.72, and 0 kg ha-1 to 2 869 kg ha-1, respectively. Time since fire strongly influenced flowering; highest probability of flowering occurred 1 yr after burning, followed by an abrupt decrease 2 yr after burning, then a gradual increase from 3 to 5 yr after fires (polynomial regression, P<0.0001 for fixed effects). Probability of fruiting increased with increasing time since fire (quadratic regression, P<0.001 for fixed effects), but fruit yields showed no pattern in response to time since fire (P=0.916). The decrease in influence of fire from flowering through fruit maturity presumably was caused by mortality from factors such as caterpillar predation and fungal infection. To promote increased flowering and fruit yields, we recommend that growing season burns be conducted approximately every 5 yr. We suggest, however, that management strategy be modified as necessary to maintain ecosystem diversity and function.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2111/REM-D-11-00183.1
    Scopus Count
    Collections
    Rangeland Ecology & Management, Volume 66, Number 1 (January 2013)

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