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Managed realignment for habitat compensation: Use of a new intertidal habitat by fishes

Nunn, A.D.; Clifton-Dey, D.; Cowx, I.G.


D. Clifton-Dey

I.G. Cowx


Managed realignment has become an increasingly common mechanism to increase the efficiency and sustainability of flood defences, reduce defence costs or compensate for habitat losses. This study investigated the use by fishes of a new intertidal habitat, created by managed realignment, intended to compensate for the loss of mudflat associated with a major port development. Although broadly similar, statistically significant differences in fish species composition, abundance, biomass, size structure, diversity and diet composition indicate that the managed realignment is not yet functioning in an identical manner to the mudflat in the adjacent estuary, most likely due to differences in habitat between sites. Notwithstanding, similarity in the species composition of fyke catches in the managed realignment and estuary increased annually during the 5-year study period, suggesting that the mudflat in the realignment is still developing. Indeed, the site will inevitably change over time with accretion, establishment of vegetation and possibly development of creeks. This will not necessarily prevent the aim of the realignment scheme being achieved, as long as sufficient suitable mudflat remains.


Nunn, A., Clifton-Dey, D., & Cowx, I. (2016). Managed realignment for habitat compensation: Use of a new intertidal habitat by fishes. Ecological engineering, 87, 71-79.

Journal Article Type Article
Acceptance Date Nov 10, 2015
Online Publication Date Nov 30, 2015
Publication Date 2016-02
Deposit Date Dec 9, 2015
Publicly Available Date Dec 9, 2015
Journal Ecological engineering
Print ISSN 0925-8574
Electronic ISSN 0925-8574
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 87
Pages 71-79
Keywords Climate change; Coastal squeeze; Flood defence; Habitat creation; Habitat loss; Mudflat development
Public URL
Publisher URL
Additional Information This article is maintained by: Elsevier; Article Title: Managed realignment for habitat compensation: Use of a new intertidal habitat by fishes; Journal Title: Ecological Engineering; CrossRef DOI link to publisher maintained version:; Content Type: article; Copyright: Copyright © 2015 Elsevier B.V. All rights reserved.


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