Nature Marine

Windara, biggest reef restoration in southern hemisphere by Nature Conservancy, in Gulf St Vincent off Ardrossan

Windara, biggest reef restoration in southern hemisphere by Nature Conservancy, in Gulf St Vincent off Ardrossan
Young Leather jackets fish schooling at the Windara Reef in Gulf St Vincent.
Image by Anita Nedosyko, The Nature Conservancy project manager

Windara, the southern hemisphere’s largest reef restoration, is being led by The Nature Conservancy in Gulf St Vincent in South Australia. The reef was built in 2017-18 by placing almost 10,000 tonnes of limestone boulders, each about the size of a soccer ball, to form 150 reefs across the 20ha area, about 1km off the coast of Ardrossan on Yorke Peninsula.

After first 30,000 mature native oysters were seeded in 2018, that number has reached 50,000 – with the ultimate goal of boosting it to seven million. The native oysters (Ostrea angasi) were seeded at eight months old, about egg-yolk size, and supplied by the South Australian Research and Development Institute. The juvenile oysters are likely to begin producing spat (offspring) at three years old. It is expected take seven years to create a fully functioning self-sustaining reef.

Oyster reefs are the temperate water equivalent to coral reefs. Australia’s southern coastline was home to thousands of kilometres of oyster reefs before European settlement but dredging to remove substrate for lime production and harvesting of oysters for food wiped out all reefs except off Tasmania. Adult native oysters can filter more than 100 litres of water a day and excrete a mucus rich in nutrients that provides food for small shellfish that provide food for larger fish.

First dives to measure Windara reef’s benefits have revealed abalone, scallops, sea urchins, schools of leatherjackets, snapper, magpie perch and cuttlefish adding to its biodiversity. Hopes are for the reef to increase fish production to five tonnes per hectare a year including recreational fishing favourites such as snapper and King George whiting.

The project is a joint effort of the South Australian and Australian governments, The Nature Conservancy, Yorke Peninsula Council and Adelaide University.

*Information from The Lead South Australia

Other related ADELAIDE AZ articles

null
Regions >
Brush-tailed bettongs/ yalgiri showing strong recovery after return to Yorke Peninsula in South Australia in 2021
READ MORE+
Loaded with barley for distilleries in Scotland, the four-masted barque Pamir (top right), with the Passat, was the last of the windjammers to leave Port Victoria (see inset map) on South Australia's Spencer Gulf in 1949. Ketches such as the famous Annie Watt (top right) took bagged wheat from the jetty to the ships. Bottom: Port Victoria in 1934.
International >
Port Victoria on Spencer Gulf, South Australia, hosts windjammer ships loading grain for Europe in 1870s through to 1949
READ MORE+
A model of HMS Buffalo made by 12-year-old Keynes Dawe in 1936 as part of a South Australia centenary competition, and displayed at the South Australian Maritime Museum in Port Adelaide.
Marine >
'Bluff Jack Hindmarsh', South Australia's first governor, commands HMS 'Buffalo' as biggest of the settlement fleet
READ MORE+
Koalas in the Adelaide's Mount Lofty Ranges were targeted with a fertility programme in 2019. Image courtesy Brett Jarrett
Environment >
Overabundant koalas in Adelaide hills and Kangaroo Island set off fertility programme, call for culling in 2019
READ MORE+
Southern hairy-nosed wombats live in burrows connected into warrens with many entrances.
Nature >
Southern hairy-nosed wombat, a digger for harsh conditions, South Australia's fauna emblem from 1970
READ MORE+
Separated by the Adelaidean Sea over much of present South Australia, Australia (at right) adjoined Antarctica (central white area), as part of Gondwana supercontinent 420 million years ago. Image courtesy Wikipedia
Nature >
Adelaidean Sea covers future South Australia with Australia next to Antarctica 420 million years ago in Gondwana
READ MORE+

 

 
©2025 Adelaide AZ | Privacy | Terms & Disclaimer | PWA 1.1.58