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Conservation status of the oyster reef ecosystem of southern and eastern Australia

Citation

Gillies, CL and Castine, SA and Alleway, HK and Crawford, C and Fitzsimons, JA and Hancock, B and Koch, P and McAfee, D and McLeod, IM and zu Ermgassen, PSE, Conservation status of the oyster reef ecosystem of southern and eastern Australia, Global Ecology and Conservation, 22 Article e00988. ISSN 2351-9894 (2020) [Refereed Article]


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DOI: doi:10.1016/j.gecco.2020.e00988

Abstract

Reef ecosystems all over the world are in decline and managers urgently need information that can assess management interventions and set national conservation targets. We assess the conservation status and risk of ecosystem collapse for the Oyster Reef Ecosystem of Southern and Eastern Australia, which comprises two community sub-types established by Saccostrea glomerata (Sydney rock oyster) and Ostrea angasi (Australian flat oyster), consistent with the IUCN Red List of Ecosystems risk assessment process. We established: (i) key aspects of the ecosystem including: ecological description, biological characteristics, condition and collapse thresholds, natural and threatening processes; (ii) previous and current extent of occurrence and current area of occupancy; and (iii) its likelihood of collapse within the next 50100 years. The most severe risk rating occurred for Criterion A: Reduction in Extent (since 1750) and Criterion D: Disruption of biotic processes (since 1750), although assessment varied from Least Concern to Critically Endangered amongst the four criteria assessed. Our overall assessment ranks the risk of collapse for the ecosystem (including both community sub-types) as Critically Endangered with a high degree of confidence. Our results suggest the need for rapid intervention to protect remaining reefs and undertake restoration at suitable sites. Several restoration projects have already demonstrated this is feasible, and Australia is well equipped with government policies and regulatory mechanisms to support the future conservation and recovery of temperate oyster ecosystems.

Item Details

Item Type:Refereed Article
Keywords:shellfish reefs, oyster, marine conservation, ecosystem collapse, risk assessment
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:Assessment and management of benthic marine ecosystems
UTAS Author:Crawford, C (Dr Christine Crawford)
ID Code:143015
Year Published:2020
Web of Science® Times Cited:2
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2021-02-22
Last Modified:2021-03-03
Downloads:0

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