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Provision of refugia and seeding with native bivalves can enhance biodiversity on vertical seawalls


Bradford, TE and Astudillo, JC and Lau, ETC and Perkins, MJ and Lo, CC and Li, TCH and Lam, CS and Ng, TPT and Strain, EMA and Steinberg, PD and Leung, KMY, Provision of refugia and seeding with native bivalves can enhance biodiversity on vertical seawalls, Marine Pollution Bulletin, 160 Article 111578. ISSN 0025-326X (2020) [Refereed Article]

Copyright Statement

© 2020 Elsevier

DOI: doi:10.1016/j.marpolbul.2020.111578


Recent studies have suggested that increasing habitat complexity of artificial seawalls by modifying surface heterogeneity could enhance exploitable habitat and therefore species richness and abundance. We tested the effects of adding complex tiles (with crevices/ledges) of different heterogeneity (i.e., flat tiles resembling the seawall vs. tiles with crevices of 2.5 cm or 5.0 cm depth) and seeding with native rock oysters, Saccostrea cuccullata (unseeded vs. seeded) on species richness and abundances of intertidal marine organisms on two vertical seawalls in Hong Kong. Tiles were affixed to the mid-intertidal zone of the seawalls for 12 months. The results showed that the tiles with crevices had greater species richness and cover of sessile epifauna than flat tiles. Seeding tiles with S. cuccullata also facilitated natural recruitment of the same species. Our results support the hypothesis that using eco-engineering to increase habitat complexity can enhance the biodiversity of intertidal marine organisms on seawalls.

Item Details

Item Type:Refereed Article
Keywords:eco-engineering, biodiversity, coastal defence, ecological restoration, micro-habitat, biodiversity conservation, reclamation, sustainable development
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and estuarine ecology (incl. marine ichthyology)
Objective Division:Environmental Management
Objective Group:Marine systems and management
Objective Field:Marine biodiversity
UTAS Author:Strain, EMA (Dr Beth Strain)
ID Code:140992
Year Published:2020
Web of Science® Times Cited:4
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2020-09-17
Last Modified:2021-08-05

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