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Abstract

This study investigated temporal and spatial patterns of heavy metal content in Ulva australis. Samples were collected from the Derwent Estuary, Tasmania, Australia, over 3 years (2013-2015) at locations where historically arsenic, cadmium, lead and zinc were high in sediments and seawater. Zinc and lead content were high in U. australis at all sampling times, with levels consistent with the spatial distribution of metal within the system. Zinc in Ulva varied seasonally (4.8 – 320.7 mg·kg-1), but lead did not. Zinc and lead were highest in the middle-upper estuary, close to the zinc smelter, where seawater concentrations were higher. The results suggest that spatial variation of metal content in Ulva is a reflection of variability in the seawater, which in turn indicates that U. australis could be used for monitoring the effects of metals in estuarine systems, and that U. australis could be a useful addition to existing management strategies.

Item Type:	Article
Authors/Creators:	Farias, DR and Hurd, CL and Eriksen, RS and MacLeod, CK
Keywords:	Ulva, biomonitoring, heavy metal, pollution, biological indicators, contamination, macroalgae, seasonal variability
Journal or Publication Title:	Global NEST Journal
Publisher:	Global Network for Environmental Science and Technology
ISSN:	1790-7632
DOI / ID Number:	https://doi.org/10.30955/gnj.002638
Copyright Information:	Copyright 2019 Global NEST
Related URLs:	Google Scholar: Hurd, CL UTAS Profile: Hurd, CL Google Scholar: MacLeod, CK UTAS Profile: MacLeod, CK
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