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Estuaries and Coasts

, Volume 37, Issue 4, pp 973–985 | Cite as

Sediment Abiotic Patterns in Current and Newly Created Intertidal Habitats from an Impacted Estuary

  • Olivier BeauchardEmail author
  • Johannes Teuchies
  • Sander Jacobs
  • Eric Struyf
  • Tom Van der Spiet
  • Patrick Meire
Article

Abstract

The controlled reduced tide system (CRT) is a new technique for restoring tidal marshes and is being tested in the Schelde estuary (Belgium). Biogeochemical processes within a CRT were hypothesized to support and improve several estuarine functions such as sediment trapping and nutrient burial. In 2006, the first pilot CRT was implemented in the freshwater zone of the estuary. Fifteen sediment physicochemical descriptors were intensively monitored over 3 years in the newly created CRT and in reference habitats from the adjacent estuary. Soil transformed rapidly in the CRT; in the most frequently flooded zones, the formation of a nutrient-rich estuarine sedimentary substrate contrasted with the estuarine sand flats where shear stress is sustained by coastal squeeze. The temporal dynamics of the sediment descriptors were investigated to identify key processes involved in the flooding of the CRT sediment. Although many processes were specific to the CRT, both reference and CRT sediment characteristics experienced similar long-term oscillations. However, despite such variations, successful CRT nutrient trapping and fine particles burial were demonstrated. This study proves that the CRT, in accordance with restoration goals, can restore ecological functions in impacted estuaries. In addition, the results highlight the complex timing of abiotic patterns in intertidal sediments.

Keywords

Tidal marsh Monitoring Sediment characteristics Nutrient dynamics 

Notes

Acknowledgments

This research was funded by graduate research fellowships of Antwerp University. We greatly thank Katrijn Vanrenterghem for field and laboratory contributions, Stefan Van Damme for valuable comments, and Greg Silsbe who improved the quality of the last version of the text. We are also grateful to two anonymous referees for constructive remarks that substantially improved the quality of manuscript. Part of this work was realized in collaboration with the Flemish Government, Environment and Infrastructure Department, W&Z (Sigma plan).

Supplementary material

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Copyright information

© Coastal and Estuarine Research Federation 2013

Authors and Affiliations

  • Olivier Beauchard
    • 1
    • 2
    Email author
  • Johannes Teuchies
    • 1
  • Sander Jacobs
    • 1
    • 3
  • Eric Struyf
    • 1
  • Tom Van der Spiet
    • 1
  • Patrick Meire
    • 1
  1. 1.University of Antwerp, Ecosystem Management Research GroupWilrijkBelgium
  2. 2.Netherlands Institute for Sea Research (NIOZ)YersekeThe Netherlands
  3. 3.Institute of Nature and Forest ResearchBrusselsBelgium

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