Southern Moreton Bay Islands

Southern Moreton Bay Islands National Park comprises a group of sandy islands in southern Moreton Bay southeast of Brisbane, protecting coastal heath, wetland, and mangrove communities of this dynamic bay environment. The islands including North Stradbroke's southern extent, Coochiemudlo, Macleay, and smaller islands, are part of the unique bay ecosystem. The national park protects natural areas on and around these islands from the development pressures of the rapidly growing southeast Queensland urban region.

The bay islands support shorebirds including migratory species from the northern hemisphere, and the mangroves and tidal flats are important feeding grounds. Dugongs graze on seagrass in the bay, and dolphins are frequently seen. Sea turtles nest on some beach areas. The coastal heath and woodland provide habitat for small mammals, reptiles, and diverse bird species. The bay's position as part of the Moreton Bay Marine Park provides additional protection for the marine environment.

The islands support wallum banksia heath on the sandy soils, paperbark wetlands in low-lying areas, and mangroves fringing the sheltered shores. The wallum heath is a threatened ecological community, important for a range of specialised plants and animals adapted to the low-nutrient, seasonally waterlogged sandy soils. Aquatic vegetation in the bay, particularly seagrass beds, is ecologically critical for dugongs and turtles.

The Southern Moreton Bay islands are large sand islands formed by coastal processes over hundreds of thousands of years, similar to the larger North Stradbroke and South Stradbroke islands. The sand islands sit on the continental shelf in the sheltered waters of Moreton Bay. The bay itself is a coastal embayment formed by the presence of the barrier sand islands (Moreton and Stradbroke) sheltering the mainland coast. The sandy geology supports the distinctive wallum heath vegetation.

The bay islands have a warm subtropical climate with mild winters and warm summers. The sheltered position within Moreton Bay moderates the effects of open ocean weather. Annual rainfall averages around 1,400 millimetres. Summer is the peak season for visitors, with warm water temperatures suitable for swimming and water sports. Winter is mild and often brings clear skies ideal for wildlife observation.

The Southern Moreton Bay area is part of the traditional country of the Quandamooka people (Noonuccal and Nunukul), Yugarapul, and Jinibara peoples, who lived around the bay and its islands. European settlement of Moreton Bay began with the penal colony at Redcliffe and then Brisbane in the 1820s, and the bay's islands were progressively settled and used for fishing, farming, and quarantine purposes. The islands have been important for recreation for Brisbane residents since the early 20th century.

Southern Moreton Bay Islands National Park was established to protect the natural areas of these sand islands from ongoing development pressure in one of Australia's fastest-growing urban regions. The park contributes to the Moreton Bay Marine Park and Ramsar wetland conservation framework. Management addresses the challenges of protecting natural values in a peri-urban setting with high recreational use.

The islands offer beach walking, shorebird watching, and experiencing the coastal heath environment. The tidal flats and mangroves provide excellent wildlife observation opportunities at low tide. Kayaking between islands provides a way to explore the bay's ecosystems. The sheltered bay waters are ideal for family beach activities. The islands are accessible as day trips from Brisbane.

The islands are reached by ferry from Cleveland, Redland Bay, or other southeast Brisbane launch points. Ferry services are frequent to the main inhabited islands. The national park areas have limited facilities. Day use from Brisbane is practical given the short ferry rides. Accommodation and services are available on the larger inhabited islands.

Protecting the wallum banksia heath from development, weed invasion, and inappropriate fire management is a key conservation challenge. Managing recreational impacts on the beach and mangrove environments is important given the proximity to Brisbane. The seagrass beds that support dugongs in the bay face ongoing threats from water quality, boat propeller damage, and storm damage. Migratory shorebird habitat protection requires managing recreational disturbance on the tidal flats.