Derwent Estuary Symposium

Save Ralphs Bay Poster Abstract

Ralphs Bay in the Derwent estuary is widely recognised for its importance as an area of ecological significance. It sustains a small but critical population of the endangered Spotted Handfish, is home to significant populations of resident and migratory shorebirds, and is reported to provide important ecosystem services such as denitrification which assists in the reduction of nutrient loads.

The extensive sand flats and fringing saltmarsh provide important habitats for a wide variety of invertebrate and microalgal species, which support a complex food web unique in the Derwent.

Ongoing monitoring and research conducted over the last 30 years indicates many species in Ralphs Bay are vulnerable to the legacy of past urban and industrial practices in the greater Derwent, but that through sound management and targeted efforts to promote ecosystem recovery, water and sediment quality may improve in the longer term.

In addition to natural and scientific values, Ralphs Bay has significant aesthetic, community and recreational values, for local residents and visitors alike. Recent threats to the bay and the uncertain status of the Conservation Area, have ignited passionate debate at all levels of the community. This poster celebrates the diverse and unique nature of the Ralphs Bay environment, and illustrates the complexity of control and jurisdiction over planning issues affecting a recovering estuarine system.