Variations in sensitivity to copper and zinc among three isolated populations of the seagrass, Zostera capricorni

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Show simple item record Macinnis-Ng, CMO Ralph, PJ 2009-12-21T02:30:24Z 2004-04-29
dc.identifier.citation Journal of Experimental Marine Biology and Ecology, 2004, 302 (1), pp. 63 - 83
dc.identifier.issn 0022-0981
dc.identifier.other C1 en_US
dc.description.abstract Metal accumulation in seagrass is well documented, but toxic impacts and mechanisms of tolerance in seagrass are not well understood. We looked at the impacts of 10 h exposure to copper and zinc for three isolated populations of Zostera capricorni in the Sydney (Australia) region. Photosynthetic efficiency (measured as the effective quantum yield, ΔF/Fm′) and chlorophyll pigment concentrations showed different sensitivities to metal impacts at the three geographically isolated sites. Seagrasses from the least developed estuary were the most sensitive to metals and the two more developed estuaries had more tolerant populations. Determination of metal concentrations in the leaves showed that there was no difference in metal exclusion as the sensitive seagrass accumulated no more metal than the tolerant seagrass. Equally, background levels of copper and zinc in the sediments and seagrass tissue could not explain the differences in tolerance. We discuss some other possible mechanisms of tolerance. The outcomes suggest that assessing metal content in seagrass tissue may not demonstrate degree of photosynthetic impact. © 2003 Elsevier B.V. All rights reserved.
dc.language eng
dc.relation.isbasedon 10.1016/j.jembe.2003.10.002
dc.title Variations in sensitivity to copper and zinc among three isolated populations of the seagrass, Zostera capricorni
dc.type Journal Article
dc.parent Journal of Experimental Marine Biology and Ecology
dc.journal.volume 1
dc.journal.volume 302
dc.publocation Netherlands en_US
dc.identifier.startpage 63 en_US
dc.identifier.endpage 83 en_US DVCRch.Institute for Water & Environmental Resource Mgmnt en_US
dc.conference Verified OK en_US
dc.for 060203 Ecological Physiology
dc.personcode 980151
dc.personcode 890085
dc.percentage 100 en_US Ecological Physiology en_US
dc.classification.type FOR-08 en_US
dc.description.keywords Chlorophyll a fluorescence
dc.description.keywords Metal tolerance
dc.description.keywords Metal toxicity
dc.description.keywords Photosynthetic impacts
dc.description.keywords Seagrass
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
pubs.organisational-group /University of Technology Sydney/Strength - C3
utslib.copyright.status Closed Access 2015-04-15 12:17:09.805752+10
utslib.collection.history Closed (ID: 3)

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