Title
Sediment abiotic patterns in current and newly created intertidal habitats from an impacted estuary
Author
Faculty/Department
Faculty of Sciences. Biology
Publication type
article
Publication
Lawrence, Mass. ,
Subject
Chemistry
Biology
Source (journal)
Estuaries and coasts / Estuarine Research Federation [Lawrence, Mass.] - Lawrence, Mass.
Volume/pages
37(2014) :4 , p. 973-985
ISSN
1559-2723
ISI
000337030300014
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
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.
E-info
https://repository.uantwerpen.be/docman/iruaauth/b516ae/ee17629.pdf
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Handle