Dee Why Lagoon Wildlife Refuge

Toolijooa has been managing the maintenance and restoration of bushland within Dee Why Lagoon Wildlife Refuge since 2004. The refuge contains approximately 47 hectares of remnant bushland and various open space areas.

The bushland and wetlands of the refuge contain a sequence of coastal ecosystems rarely found in an urban environment. Amongst the ten vegetation communities that occur throughout Dee Why Lagoon Wildlife Refuge, seven are listed as Endangered Ecological Communities within five determinations under the Threatened Species Conservation Act 1995. These include:

    • Bangalay Sand Forest
    • Sydney Freshwater Wetlands
    • Swamp Schlerophyll Forest on Coastal Floodplains (including Esturine Paperbark Scrub, Estuarine Reedland and Swamp Mahogany Forest)
    • Coastal Saltmarsh
    • Swamp Oak Floodplain Forest

The refuge also provides habitat for endangered migratory bird species listed under international conservation agreements.

Suppressing and reducing population of invasive exotic species continues to form a major component of the contract works at Dee Why Lagoon in order to maintain the integrity of habitat and remnant vegetation within this regionally significant reserve.

While vegetation condition remains very good within many core sections of this regionally significant reserve, the long interface with residences and Pittwater Road, and stormwater outlets scattered throughout has left large areas highly vulnerable to ongoing weed invasion. Ipomoea cairica, I. indica and Lonicera japonica all pose a major threat to remnant canopy throughout the reserve while Acetosa sagittata, Asparagus aethiopicus and Chrysanthemoides monolifera ssp. rotundata are a significant problem throughout the dune system on the eastern side of the lagoon. Ubiquitous exotic herbaceous species, such as Bidens pilosa, Ehrharta erecta and Tradescantia fluminensis have also established, particularly along reserve edges and stormwater-affected areas.