Longer term (25–50 year) climate and sea level averaged conditions for sites across northern Australia.

SLSI is the sea level stress index described in the Methods. Data sources include the: Permanent Service for Mean Sea Level (PSMSL)–(https://www.psmsl.org/) and the, Australian Bureau of Meteorology (http://www.bom.gov.au/). Sites in bold are those located in Australia’s Gulf of Carpentaria (for site location details, see Fig 2; Table A in S1 Text). The WCI (% Wetland Cover Index) describes the ratio of mangrove area to total area of tidal wetlands (the combination of mangroves, tidal saltmarsh and saltpan) in local estuarine systems [3].