Abstract
For wetland restoration success to be maximized, restoration managers need better information regarding how the frequency, depth, and duration of flooding affect soil chemistry and the survival, growth, and morphology of targeted plant species. In a greenhouse study we investigated the impact of four different flooding durations (0 %, 40 %, 60 %, and 100 %) on soil physicochemistry and the responses of seedlings and adults of two species of emergent wetland macrophytes commonly used in restoration efforts (Schoenoplectus acutus and Schoenoplectus californicus). The longest flooding duration, which created more reducing soil conditions, resulted in significantly reduced survival of S. acutus adults (34 ± 21 % survival) and complete mortality of seedlings of both species. Schoenoplectus californicus adults exhibited higher flooding tolerance, showing little impact of flooding on morphology and physiology. A companion field study indicated that S. californicus maintained stem strength regardless of flooding duration or depth, supporting the greenhouse study results. This information serves to improve our understanding of the ecological differences between these species as well as provide restoration managers with better guidelines for targeted elevation and hydrologic regimes for these species in order to enhance the success of restoration plantings and better predict restoration site development.
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Acknowledgments
Funding for this study was partially provided by the Society of Wetland Scientists’ student research grant program. Our sincere thanks is extended to members of the Coastal Plant Ecology Laboratory at the University of Louisiana at Lafayette, the National Wetlands Research Center in Lafayette, LA, and Drs. Dennis Albert and Dan Cox of Oregon State University.
Additionally, we thank Drs. Scott France, Paul Leberg, and Beth Middleton for comments and manuscript review. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
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Sloey, T.M., Howard, R.J. & Hester, M.W. Response of Schoenoplectus acutus and Schoenoplectus californicus at Different Life-History Stages to Hydrologic Regime. Wetlands 36, 37–46 (2016). https://doi.org/10.1007/s13157-015-0713-8
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DOI: https://doi.org/10.1007/s13157-015-0713-8