| Chronic herbicide exposures affect the sensitivity and community structure of tropical benthic miroalgae. | |
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MedLine Citation:
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PMID: 22019103 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The effects of prolonged exposure to low concentrations of herbicides on tropical periphyton (biofilm) communities are largely unknown. Tropical estuarine biofilms established in microcosms were therefore exposed to diuron (photosystem-II-inhibitor) at 2-16μgL(-1) for 4weeks. The biofilms, consisting of diatoms, filamentous brown algae and cyanobacteria, developed a tolerance to diuron during this period as measured by Phyto-PAM fluorometry. Microscopy and pigment analysis revealed that this decrease in sensitivity was accompanied by a shift in species composition towards communities dominated by diatoms. The combination of techniques enabled the first identification of pollution-induced community tolerance (PICT) in tropical estuarine periphyton in response to chronic herbicide exposures. Community composition changed compared to controls at environmentally relevant concentrations of 1.6μgL(-1), while development of PICT was evident at 6.5μgL(-1) diuron, with no recovery (over 2weeks) in uncontaminated water, indicating chronic pollution induced shifts in community structure. |
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Authors:
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Marie Magnusson; Kirsten Heimann; Michael Ridd; Andrew P Negri |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-10-21 |
Journal Detail:
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Title: Marine pollution bulletin Volume: - ISSN: 1879-3363 ISO Abbreviation: - Publication Date: 2011 Oct |
Date Detail:
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Created Date: 2011-10-24 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0260231 Medline TA: Mar Pollut Bull Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Elsevier Ltd. All rights reserved. |
Affiliation:
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AIMS@JCU, Australian Institute of Marine Science, School of Marine and Tropical Biology, James Cook University, Townsville, QLD 4811, Australia; School of Pharmacy and Molecular Sciences, James Cook University, Townsville, QLD 4811, Australia; School of Marine and Tropical Biology, James Cook University, Townsville, QLD 4811, Australia. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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