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Salt marsh vegetation promotes efficient tidal channel networks

Author

Listed:
  • William S. Kearney

    (Boston University)

  • Sergio Fagherazzi

    (Boston University)

Abstract

Tidal channel networks mediate the exchange of water, nutrients and sediment between an estuary and marshes. Biology feeds back into channel morphodynamics through the influence of vegetation on both flow and the cohesive strength of channel banks. Determining how vegetation affects channel networks is essential in understanding the biological functioning of intertidal ecosystems and their ecosystem services. However, the processes that control the formation of an efficient tidal channel network remain unclear. Here we compare the channel networks of vegetated salt marshes in Massachusetts and the Venice Lagoon to unvegetated systems in the arid environments of the Gulf of California and Yemen. We find that the unvegetated systems are dissected by less efficient channel networks than the vegetated salt marshes. These differences in network geometry reflect differences in the branching and meandering of the channels in the network, characteristics that are related to the density of vegetation on the marsh.

Suggested Citation

  • William S. Kearney & Sergio Fagherazzi, 2016. "Salt marsh vegetation promotes efficient tidal channel networks," Nature Communications, Nature, vol. 7(1), pages 1-7, November.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms12287
    DOI: 10.1038/ncomms12287
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    Cited by:

    1. Kevin C. Hanegan & Duncan M. FitzGerald & Ioannis Y. Georgiou & Zoe J. Hughes, 2023. "Long-term sea level rise modeling of a basin-tidal inlet system reveals sediment sinks," Nature Communications, Nature, vol. 14(1), pages 1-13, December.

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