Response of three arid zone floodplain plant species to inundation

J.M. Nicol, G.G. Ganf, K.F. Walker, B. Gawne

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    For species to persist on floodplains and in temporary wetlands in arid climates, where large and unpredictable water level fluctuations are common, at least one life history stage must be able to survive inundation. We investigated the survival and performance (RGR, total biomass and above-to-belowground biomass (A:B)) of three common and often coexisting arid zone floodplain species: Xanthium strumarium, Cyperus gymnocaulos and Ludwigia peploides. Observations suggested the species had different responses to inundation, which was tested in a controlled pond experiment. Plants were held at three elevations (+ 10 cm, − 20 and − 70 cm) and subjected to three hydrological regimes (static 90 cm, 1 and 5 cm day−1 inundation) for 16 weeks. Xanthium strumarium died when completely inundated for longer than 4 weeks but when partially flooded survived, showed lower growth rates, increased A:B and produced adventitious roots. C. gymnocaulos showed reduced growth rates when partially flooded and senesced to rhizomes when completely inundated for longer than 4 weeks, which re-sprouted after inundation pressure was removed. L. peploides responded positively to flooding with increased A:B and the production of adventitious roots. The species exhibited three contrasting responses to inundation, which do not necessarily fit neatly within existing water regime functional classification frameworks
    Original languageEnglish
    Pages (from-to)1-11
    Number of pages11
    JournalPlant Ecology
    DOIs
    Publication statusPublished - 2017

    Fingerprint

    Xanthium strumarium
    adventitious roots
    floodplains
    arid zones
    floodplain
    adventitious root
    Cyperus
    belowground biomass
    rhizomes
    surface water level
    wetlands
    life history
    taxonomy
    hydrological regime
    biomass
    rhizome
    water level
    flooding
    pond
    water

    Cite this

    Nicol, J.M. ; Ganf, G.G. ; Walker, K.F. ; Gawne, B. / Response of three arid zone floodplain plant species to inundation. In: Plant Ecology. 2017 ; pp. 1-11.
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    abstract = "For species to persist on floodplains and in temporary wetlands in arid climates, where large and unpredictable water level fluctuations are common, at least one life history stage must be able to survive inundation. We investigated the survival and performance (RGR, total biomass and above-to-belowground biomass (A:B)) of three common and often coexisting arid zone floodplain species: Xanthium strumarium, Cyperus gymnocaulos and Ludwigia peploides. Observations suggested the species had different responses to inundation, which was tested in a controlled pond experiment. Plants were held at three elevations (+ 10 cm, − 20 and − 70 cm) and subjected to three hydrological regimes (static 90 cm, 1 and 5 cm day−1 inundation) for 16 weeks. Xanthium strumarium died when completely inundated for longer than 4 weeks but when partially flooded survived, showed lower growth rates, increased A:B and produced adventitious roots. C. gymnocaulos showed reduced growth rates when partially flooded and senesced to rhizomes when completely inundated for longer than 4 weeks, which re-sprouted after inundation pressure was removed. L. peploides responded positively to flooding with increased A:B and the production of adventitious roots. The species exhibited three contrasting responses to inundation, which do not necessarily fit neatly within existing water regime functional classification frameworks",
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    Response of three arid zone floodplain plant species to inundation. / Nicol, J.M.; Ganf, G.G.; Walker, K.F.; Gawne, B.

    In: Plant Ecology, 2017, p. 1-11.

    Research output: Contribution to journalArticle

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