2017
DOI: 10.1111/emr.12264
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Ecological restoration of a severely degraded coastal acid sulfate soil: A case study of the East Trinity wetland, Queensland

Abstract: A severely degraded acid sulfate soil wetland near Cairns, Queensland, has been returned to a functional estuarine habitat using a cost‐effective, low‐technology method based on the reintroduction of tidal water. Gradual increases in tidal inundation, combined with targeted liming of the tidal stream, restored conditions that promoted chemical and microbial processes leading to the rapid recolonisation of mangrove communities and other estuarine flora and fauna. Protocols and understanding developed at East Tr… Show more

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Cited by 19 publications
(8 citation statements)
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“…Interestingly, if high tides continue to occur during these periods of low wetland depth, the alkaline seawater ingress can eliminate the acidic conditions; which would not have occurred when the wetland was bunded. However, the buffering of saltwater potential has been shown to contribute to secondary implications, including the precipitation of heavy metals that are available in the water column [8].…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Interestingly, if high tides continue to occur during these periods of low wetland depth, the alkaline seawater ingress can eliminate the acidic conditions; which would not have occurred when the wetland was bunded. However, the buffering of saltwater potential has been shown to contribute to secondary implications, including the precipitation of heavy metals that are available in the water column [8].…”
Section: Discussionmentioning
confidence: 99%
“…However, these wetlands are under great pressure due to urban and industrial development [6, 7] or agricultural and grazing land expansion, with many coastal wetlands becoming lost due to the construction of artificial barriers (e.g. bunds, roads, culverts and floodgates) which have stopped or reduced tidal flushing, negatively impacting aesthetic and ecological values [8]. The widespread degradation of coastal wetlands has led to major shifts in species assemblages and declines in aquatic species productivity.…”
Section: Introductionmentioning
confidence: 99%
“…This project, adjacent to the city of Cairns, was designed to remediate a severe occurrence of acid sulfate soils caused by draining of wetlands for sugarcane and installing a bund wall to prevent tidal flooding. The acidity resulted in the death of native vegetation on 720 ha of a 940-ha site and threatened marine environments (Luke et al 2017). Remediation of the acidity was successfully achieved by full flooding by seawater, initially assisted by the addition of lime.…”
Section: Shifts In Whole Ecosystemsmentioning
confidence: 99%
“…Numerous field solutions have been implemented over decades for treating highly acidic groundwater (Evangelou and Zhang, 1995, Mulligan et al, 2001, Indraratna et al, 2005, Luke et al, 2017, Indraratna et al, 2017, but most of these techniques that involve floodgates and weirs increase the risk of flooding, while excessive chemical (lime and gypsum) treatment increase the alkalinity levels of the soil, which can affect aquaculture farming. After numerous preliminary trials, Permeable Reactive Barriers (PRBs) have proven to be one of the most cost-effective and efficient passive treatment methods of neutralising groundwater acidity in low-lying pyritic floodplains and acid mine drainage in coal collieries (Thiruvenkatachari et al, 2008, Indraratna et al, 2009, Ekolu and Bitandi, 2018.…”
Section: Introductionmentioning
confidence: 99%