Site-specific features influence sediment stability of intertidal flats

Defew, E. C., Tolhurst, T. J. ORCID: https://orcid.org/0000-0002-8578-7580 and Paterson, D. M. (2002) Site-specific features influence sediment stability of intertidal flats. Hydrology and Earth System Sciences (HESS), 6 (6). pp. 971-981. ISSN 1027-5606

Full text not available from this repository. (Request a copy)

Abstract

The factors that influence the sediment stability and the transport of estuarine mudflats are not yet fully understood but knowledge of them is essential in coastal engineering applications and pollution ecology studies. The suggestion that variation in predictive models of sediment stability might be due to site-specific characteristics is investigated using data from four estuarine mudflats (Eden Estuary, Scotland, the Biezelingsche Ham, Zandkreek, and Molenplaat mudflats in The Netherlands). These estuaries differ in their environmental conditions, macrofaunal species composition and local features (e.g. Enteromorpha mats, migratory biofilms). Stable and unstable sediments were compared, and mean chlorophyll-a concentrations and granulometry of the sediments were significantly different between the two groups. Step-wise multiple linear regressions were applied to the sediment stability data of all sites to establish the influences on erosion threshold of microphytobenthic biomass, water content, granulometry, organic carbon content and the abundance of dominant macrofaunal species. The stability of each site was influenced by different factors. Sediment stability of the Eden Estuary was affected by the Enteromorpha bloom; Biezelingsche Ham was influenced by the highly migratory nature of the diatom biofilms and the abundance of Corophium volutator; the polychaete worm Arenicola marina had a net negative effect on sediment stability of the Zandkreek; and the Molenplaat was influenced by microphytobenthic biomass. This research highlights the need for site-specific calibration of models and suggests that a universal proxy parameter for sediment stability is unlikely to be obtained.

Item Type: Article
Additional Information: © Author(s) 2002. This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.
Faculty \ School: Faculty of Science > School of Environmental Sciences
Depositing User: Rachel Snow
Date Deposited: 12 Apr 2011 09:00
Last Modified: 24 Oct 2022 03:16
URI: https://ueaeprints.uea.ac.uk/id/eprint/28930
DOI: 10.5194/hess-6-971-2002

Actions (login required)

View Item View Item