Herbicide contamination and the potential impact to seagrass meadows in Hervey Bay, Queensland, Australia

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Title Herbicide contamination and the potential impact to seagrass meadows in Hervey Bay, Queensland, Australia
Author McMahon, Kathryn; Bengtson Nash, Susan; Eaglesham, Geoff; Muller, Jochen F.; Duke, Norman C.; Winderlich, Steve
Journal Name Marine Pollution Bulletin
Year Published 2005
Place of publication United Kingdom
Publisher Elsevier
Abstract Low concentrations of herbicides (up to 70 ng l1), chiefly diuron (up to 50 ng l1) were detected in surface waters associated with inter-tidal seagrass meadows of Zostera muelleri in Hervey Bay, south-east Queensland, Australia. Diuron and atrazine (up to 1.1 ng g1 dry weight of sediment) were detected in the sediments of these seagrass meadows. Concentration of the herbicides diuron, simazine and atrazine increased in surface waters associated with seagrass meadows during moderate river flow events indicating herbicides were washed from the catchment to the marine environment. Maximum herbicide concentration (sum of eight herbicides) in the Mary River during a moderate river flow event was 4260 ng l1. No photosynthetic stress was detected in seagrass in this study during low river flow. However, with moderate river flow events, nearshore seagrasses are at risk of being exposed to concentrations of herbicides that are known to inhibit photosynthesis.
Peer Reviewed Yes
Published Yes
Volume 51
Issue Number 1-4
Page from 325
Page to 334
ISSN 0025-326X
Date Accessioned 2010-07-01
Language en_AU
Research Centre Environmental Futures Research Institute
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Marine and Estuarine Ecology (incl Marine Ichthyology)
URI http://hdl.handle.net/10072/33051
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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