Unusually high sedimentary metal concentrations in intermittently closed and open lakes and lagoons (ICOLLs) in the northern lagoons of Sydney (Australia).

Autor: Birch GF; Geocoastal Research Group, School of Geosciences, The University of Sydney, New South Wales, Australia. Electronic address: gavin.birch@sydney.edu.au., Lee JH; Geocoastal Research Group, School of Geosciences, The University of Sydney, New South Wales, Australia; Lotsearch, Milsons Point, New South Wales, Australia., Gunns T; Geocoastal Research Group, School of Geosciences, The University of Sydney, New South Wales, Australia., Besley CH; Monitoring, Design and Reporting, Customer Delivery, Sydney Water, NSW 2143, Australia.
Jazyk: angličtina
Zdroj: Marine pollution bulletin [Mar Pollut Bull] 2021 Nov; Vol. 172, pp. 112851. Date of Electronic Publication: 2021 Aug 16.
DOI: 10.1016/j.marpolbul.2021.112851
Abstrakt: The environmental status of three Intermittently Closed and Open Lakes and Lagoons (ICOLLs) (Manly, Curl Curl and Dee Why Lagoons) in northern Sydney (Australia) were assessed using sedimentary metals. Results identified the highest sedimentary metal enrichment in the Australian central east coast estuaries, with only a moderate ecological risk. A comparison with surficial sediment concentrations from 1996 to 2008 indicated declining metal concentrations, which is largely supported by subsurface metals data. Extensive low-lying areas of the catchments were historically reclaimed by infilling wetlands, which may have resulted in contaminated groundwater influx to the lagoons. An analysis of the sedimentary metals mix in lagoons surrounded by extensive infilling and estuaries with minor reclamation were statistically distinct. ICOLLs are environmentally sensitive due to large catchment/estuary ratios and restricted access to the ocean. A full set of baseline data is provided to support future monitoring of anthropogenic impacts on the system.
(Copyright © 2021 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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