Planted mangroves cap toxic petroleum-contaminated sediments

Article


Waryszak, Paweł, Palacios, Maria M., Carnell, Paul E., Yilmaz, I. Noyan and Macreadie, P.I.. 2021. "Planted mangroves cap toxic petroleum-contaminated sediments." Marine Pollution Bulletin. 171. https://doi.org/10.1016/j.marpolbul.2021.112746
Article Title

Planted mangroves cap toxic petroleum-contaminated sediments

ERA Journal ID39756
Article CategoryArticle
AuthorsWaryszak, Paweł, Palacios, Maria M., Carnell, Paul E., Yilmaz, I. Noyan and Macreadie, P.I.
Journal TitleMarine Pollution Bulletin
Journal Citation171
Article Number112746
Number of Pages6
Year2021
PublisherElsevier
Place of PublicationUnited Kingdom
ISSN0025-326X
1879-3363
Digital Object Identifier (DOI)https://doi.org/10.1016/j.marpolbul.2021.112746
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S0025326X21007803
Abstract

Mangroves are known to provide many ecosystem services, however there is little information on their potential role to cap and immobilise toxic levels of total petroleum hydrocarbons (TPH). Using an Australian case study, we investigated the capacity of planted mangroves (Avicennia marina) to immobilise TPH within a small embayment (Stony Creek, Victoria, Australia) subjected to minor oil spills throughout the 1980s. Mangroves were planted on the oil rich strata in 1984 to rehabilitate the site. Currently the area is covered with a dense mangrove forest. One-meter-long sediment cores revealed that mangroves have formed a thick (up to 30 cm) organic layer above the TPH-contaminated sediments, accumulating on average 6.6 mm of sediment per year. Mean TPH levels below this organic layer (30–50 cm) are extremely toxic (30,441.6 mg kg−1), exceeding safety thresholds up to 220-fold which is eight times higher when compared to top layer (0–10 cm).

KeywordsTotal petroleum hydrocarbons ; Oil spill immobilisation ; Sediment contamination ; Planted mangroves
ANZSRC Field of Research 2020410402. Environmental assessment and monitoring
410401. Conservation and biodiversity
410504. Surface water quality processes and contaminated sediment assessment
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Byline AffiliationsDeakin University
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