Green Adelaide has commissioned, and now released, the report Persistence study_propagules and juvenile mangroves at the St Kilda boardwalk by Peri Coleman, Delta Environmental Consulting and Faith Coleman.
Following the hypersalinity event (starting in December 2019) that killed Avicennia marina mangroves in South Australia’s Barker Inlet, the consultants undertook a monitoring program at the St Kilda mangrove boardwalk between December 2021 to November 2022. The report outlines how juvenile mangroves have fared and makes observations of adult trees in the adjacent areas of stressed and healthy trees.
Of great concern, the report found that
‘The slow rate of recovery and evidence of ongoing stress in live trees within the transition zone led the authors to consider that reducing hypersalinity inputs should be the initial focus of recovery efforts’.
This is consistent with the recent report prepared for the Department for Environment and Water, University of Adelaide, Adelaide by Leyden E, Thomas B, and Mosley LM (2022) St Kilda mangrove and saltmarsh hypersaline brine contamination 2020.
This advice also mirrors that advocated by the Save St Kilda Mangrove Alliance, since its formation in early 2020.