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Ecosystem engineering by a canopy-forming kelp facilitates the recruitment of native oysters

Citation

Shelamoff, V and Layton, C and Tatsumi, M and Cameron, MJ and Wright, JT and Johnson, CR, Ecosystem engineering by a canopy-forming kelp facilitates the recruitment of native oysters, Restoration Ecology, 27, (6) pp. 1442-1451. ISSN 1061-2971 (2019) [Refereed Article]

Copyright Statement

© 2019 Society for Ecological Restoration

DOI: doi:10.1111/rec.13019

Abstract

Ecosystem engineers are species that influence the abiotic and biotic environment around them and may assist the restoration of associated species, including other habitat‐forming species. We deployed an array of 28 artificial reefs with transplanted Ecklonia radiata, the dominant canopy‐forming kelp species across southern Australia, to investigate how the patch size and density of E. radiata influenced the establishment of the associated communities of plants and animals. Many of the reefs were rapidly colonized by Ostrea angasi, a critically depleted reef‐forming oyster. Over the 24‐month deployment of the reefs, thick oyster mats formed across the entire surface of many of the reefs with estimated biomass densities exceeding 5 kg of live oysters/m2; however, oyster density was dependent on E. radiata patch size and density. Increasing patch size and the presence of kelp resulted in significantly higher densities of oysters 5 months after the reefs were deployed and at the end of the experiment, where oysters were approximately three times more numerous on reefs with kelp compared to those without kelp. E. radiata appeared to facilitate the establishment of O. angasi largely through its capacity to reduce benthic light and thus suppress competition from turfing algae. These results may inform the development of novel approaches to tackle recruitment bottlenecks affecting the restoration of O. angasi reefs.

Item Details

Item Type:Refereed Article
Keywords:oyster, restoration, facilitation, kelp, Ostrea angasi, recruitment, shellfish reef, turf algae
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and Estuarine Ecology (incl. Marine Ichthyology)
Objective Division:Environment
Objective Group:Rehabilitation of Degraded Environments
Objective Field:Rehabilitation of Degraded Coastal and Estuarine Environments
UTAS Author:Shelamoff, V (Mr Victor Shelamoff)
UTAS Author:Layton, C (Mr Cayne Layton)
UTAS Author:Tatsumi, M (Mr Masayuki Tatsumi)
UTAS Author:Cameron, MJ (Mr Matthew Cameron)
UTAS Author:Wright, JT (Associate Professor Jeffrey Wright)
UTAS Author:Johnson, CR (Professor Craig Johnson)
ID Code:137294
Year Published:2019
Web of Science® Times Cited:1
Deposited By:Ecology and Biodiversity
Deposited On:2020-02-07
Last Modified:2020-03-23
Downloads:0

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