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2022-05-16 GC Agenda - Item 7 - Attachment 2 - Noosa Oyster Ecosystem Restoration Project - Project Restoration Plan
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Log in to see the plans as drawn Figure 5.1: Rock oyster restoration substrate deployed by DPI NSW in Port Stephens estuary in
February 2021. The rock is an igneous andesite in the 100-300mm diameter size range, though some
individual rocks are up to 500mm in diameter.
Figure 5.2: Rock oyster recruitment onto the underside of andesite rock in the Port Stephens
restoration project after 12 months of rock deployment. Native rock oysters typically recruit to the
underside of the restoration substrate, then progressively colonise the upper surfaces over time,
where environmental conditions allow. Source: Craig Bohm. TNC.
5.2 Substrate augmentation
The Noosa River estuary experiences some natural oyster recruitment due to the presence of a remnant
population of rock oysters (Saccostrea spp.). The timing of natural oyster recruitment, however, is
highly variable, generally seasonal (occurring throughout the warmer months) and is difficult to predict.
The fate of the oyster larvae (where they settle) is also not well understood, and the volume of a given
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Document Set ID: 21802641
Version: 1, Version Date: 31/01/2022
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