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Vegetation Dynamics on a Restored salt Marsh Mosaic: a Re-Visitation Study in a Coastal Wetland in Central Italy

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Abstract

Coastal wetlands are biodiversity hotspots, highly threatened, and for which restoration actions have been widely implemented. Systematic monitoring of biodiversity after restoration actions on Mediterranean salt marshes vegetation needs further attention. We analyzed temporal changes in plant species composition and ecology in a restored brackish wetland on the Adriatic coast (Central Italy) by a re-visitation study of 33 historical plots (year 2010), newly collected after 10 years (2021), across a brackish mosaic composed by salt meadows, halophilous scrubs and salt steppes referable to three habitats of conservation concern in Europe (EU codes: 1410, 1420 and 1510*). Changes in species richness and cover, in the ecological characteristics of the mosaic and each habitat type were tested by comparing some ecological groups (e.g. diagnostic, alien and ruderal species) and Ellenberg bio-indicator values by a Mann-Whitney test. Similarity percentage procedure for identifying which species indicate temporal changes was also performed. After restoration, we observed a general improvement of the environmental quality of the brackish mosaic with the establishment of typical pauci-specific plant communities, a significant recovery of diagnostic species cover and a reduction of ruderal and alien ones. We also registered an increase in Ellenberg salinity and temperature values likely related also to coastal erosion and climatic change. The results of our study suggest that vegetation dynamics could be used to monitor coastal restoration trajectory in the Mid- and Long-Term local interventions.

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The datasets used and analyzed during the current study are available from the authors upon reasonable request.

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Acknowledgements

The research was partially funded by the Project INTERREG V-A IT-HR CBC Programme – ‘Strategic’ project: ‘CoAStal and marine waters integrated monitoring systems for ecosystems proteCtion AnD management’ (CASCADE – ID: 10255941). We acknowledge Carmine Di Mario for the linguistic review. We gratefully acknowledge the editor, and two anonymous reviewers for their valuable comments on a previous version of the manuscript.

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The authors declare that no funds, grants, or other support were received during the preparation of this manuscript.

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Conceptualization, F.P.T., M.V., M.C.d.F., M.L.C and A.S; formal analysis, F.P.T. and M.V.; funding acquisition, M.L.C and A.S., methodology, F.P.T., M.V., M.C.d.F., M.L.C and A.S; writing—original draft, F.P.T. and M.V.; and writing—review and editing, F.P.T., M.V., M.C.d.F., M.L.C and A.S. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Maria Carla de Francesco.

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Francesco Pio Tozzi and Marco Varricchione are joint first authors.

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Tozzi, F.P., Varricchione, M., de Francesco, M.C. et al. Vegetation Dynamics on a Restored salt Marsh Mosaic: a Re-Visitation Study in a Coastal Wetland in Central Italy. Wetlands 42, 101 (2022). https://doi.org/10.1007/s13157-022-01627-6

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  • DOI: https://doi.org/10.1007/s13157-022-01627-6

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