Shellfish reefs (oysters, mussels etc.) are “the lungs” of healthy estuaries, providing various “ecosystem engineering” services including filtering to clean the water, nutrient uptake, shoreline stabilisation and food and shelter for fish and crabs.
However, today less than 5% of historical shellfish populations remain in Pumicestone Passage, off northern Moreton Bay, due mainly to declining water quality which disrupts their breeding cycle.
“Restore Pumicestone Passage” is a group of community people with the aim of scientifically examining the best methods of restoring subtidal shellfish reefs in Pumicestone Passage and quantifying their effects on improving water quality and fish habitat in the Passage and Moreton Bay. The group’s website has a wealth of accessible information about shellfish reef restoration in Australia and internationally.