Data from the Eastern Australian Waterbird & Wetland Survey program (UNSW) - specifically, the total wetland area index from 1983 to 2015.
The annual Eastern Australian Waterbird Survey is one of the largest wildlife surveys in Australia. It surveys major wetland sites in the Murray–Darling Basin, and provides invaluable information on the ecosystem health of wetlands and rivers. The survey provides baseline information with which to assess changes in, and impacts on, eastern Australian wetlands and rivers. The survey includes estuaries, coastal lakes, rivers, swamps, floodplains and saline lakes, as well as dams, reservoirs and impoundments.
For more information see: https://www.ecosystem.unsw.edu.au/content/rivers-and-wetlands/waterbirds/eastern-australian-waterbird-survey
Data used to produce figure BIO24; see