Mangroves and associated communities of Moreton Bay
In recent times, South East Queensland has experienced a significant boom in population and economic development.
This trend is evident in the Moreton Bay region, an area which contains roughly 18,500 ha of intertidal vegetation communities including mangroves and saltmarsh.
A program to monitor the mangroves and associated communities within Moreton Bay was established by the Queensland Herbarium in 2011.
Intertidal ecosystems, including mangrove and saltmarsh communities, provide significant social, cultural, economic and ecological values. In recognition of these values, the monitoring, assessment and reporting of these ecosystems has been a central focus of resource managers and stakeholder groups.
Mangrove and associated communities are essential for maintaining the health of fisheries and coastal and marine seascapes and ecosystems. While these communities are currently protected under the Fisheries Act (1994), they are vulnerable to impacts from coastal development as well as from changes to natural processes such as siltation, nutrient runoff and climate.
The report Mangrove and associated communities of Moreton Bay, Queensland, Australia: change in extent 1955-1997-2012 (2016) by the Queensland Herbarium documents the change in extent of each mangrove and associated community from 1955 (historical) to 2012 for Moreton Bay. Supported by the earlier 1974 mapping and the 1997 mapping.
Mangrove communities have increased in area by 958 ha (6.7%) between 1955 and 2012 whereas saltmarsh communities (including samphire, marine couch and claypan) have lost 5,730 ha (64%) of their 1955 extent. Casuarina glauca communities have lost 732 ha (31%) of their area during the same period. The spatial extent of each mangrove and associated community are described for the period from 1955 to 2012. While these communities are all dynamic in nature, losses due to anthropogenic causes have also have occurred mainly from urban and infrastructure development.
Changes in extent of mangrove communities from 1955 to 2012
Changes in extent of saltmarsh communities including samphire, marine couch and claypan from 1955 to 2012
Changes in extent of Casuarina glauca communities from 1955 to 2012