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Inundation Depth Shape Phenotypic Variability of Phragmites australis in Liaohe Estuary Wetland, Northeast China

Author

Listed:
  • Panpan Cui

    (College of Water Conservancy, Shenyang Agricultural University, Shenyang 110866, China)

  • Fangli Su

    (College of Water Conservancy, Shenyang Agricultural University, Shenyang 110866, China
    Liaoning Panjin Wetland Ecosystem National Observation and Research Station, Shenyang 110866, China)

  • Fang Zhou

    (College of Water Conservancy, Shenyang Agricultural University, Shenyang 110866, China)

Abstract

Inundation shifts plant growth, species diversity and ecosystem stability, but it remains unclear how inundation depth shapes the phenotypic variability of clonal plants in an estuary wetland. To reveal the response of clonal plant populations to inundation depth, we calculated the variation of Phragmites australis using shoot height, leaf length, leaf width, leaf biomass and panicle length in the Liaohe estuary wetland. Reproductive allocation was defined by the ratio of panicle length to shoot height. Linear regression showed that shoot height, leaf length, leaf width, leaf biomass and panicle length were negatively correlated with inundation depth, while the ratio of panicle length to shoot height was negatively correlated with inundation depth ( p < 0.0001). Based on data regarding the statistical differences of plant phenotypic traits among P. australis , we recognized populations had generated variation differentiation. Compared with other functional traits, the coefficient of variation of leaf-related traits were at a high level. Therefore, leaf parameters would be the most suitable, and they increased the area and weight to support the action of plants during floods. Multivariate statistical analysis suggested that P. australis populations in the Liaohe estuary wetland were divided into two phenotypic clusters, consistent with geographical distance and morphological similarity. Our results provide a novel perspective on the ecological strategy of cloned plants under inundation change and offer theories for the conservation and restoration of estuarine wetland ecosystems.

Suggested Citation

  • Panpan Cui & Fangli Su & Fang Zhou, 2022. "Inundation Depth Shape Phenotypic Variability of Phragmites australis in Liaohe Estuary Wetland, Northeast China," Sustainability, MDPI, vol. 14(22), pages 1-13, November.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:22:p:14911-:d:969720
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    References listed on IDEAS

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    1. Matthew L. Kirwan & J. Patrick Megonigal, 2013. "Tidal wetland stability in the face of human impacts and sea-level rise," Nature, Nature, vol. 504(7478), pages 53-60, December.
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