Symbiont-specific responses in foraminifera to the herbicide diuron

Van Dam, Joost W., Negri, Andrew P., Mueller, Jochen F. and Uthicke, Sven (2012) Symbiont-specific responses in foraminifera to the herbicide diuron. Marine Pollution Bulletin, 65 4-9: 373-383. doi:10.1016/j.marpolbul.2011.08.008


Author Van Dam, Joost W.
Negri, Andrew P.
Mueller, Jochen F.
Uthicke, Sven
Title Symbiont-specific responses in foraminifera to the herbicide diuron
Journal name Marine Pollution Bulletin   Check publisher's open access policy
ISSN 0025-326X
1879-3363
Publication date 2012
Year available 2011
Sub-type Article (original research)
DOI 10.1016/j.marpolbul.2011.08.008
Volume 65
Issue 4-9
Start page 373
End page 383
Total pages 11
Place of publication Oxford, United Kingdom
Publisher Elsevier
Collection year 2012
Language eng
Formatted abstract
The effects of the photosystem II (PSII) herbicide diuron was assessed on thirteen tropical foraminifera hosting diatom, dinoflagellate, red or green algae endosymbionts. Inhibition of photosynthesis (reduced Δ F / F m ′) by diuron depended on both symbiont type and test ultrastructure, with greatest sensitivity observed for diatom- and chlorophyte-hosting species (24 h IC 25 2.5-4 μg L -1). Inhibition kinetics was slow (24-48 h until maximum inhibition) in comparison with corals, suggesting structural differences may influence herbicide uptake and transport. Although foraminifera were generally less sensitive to direct effects of diuron (inhibition Δ F / F m ′) than other marine phototrophs, damage to PSII (reduction F v /F m ) occurred at concentrations lower than observed for other organisms (24 h IC 25 3-12 μg L -1). Damage to PSII was highly light dependent and occurred at very low light intensities indicating limited photoprotective capacity. The high diversity, widespread occurrence and relative sensitivity make foraminifera good bioindicator organisms to evaluate phytotoxic stress on coral reefs.
Keyword Great Barrier Reef
Microalgae
Photoinhibition
Phytotoxicity
Pollution
Symbiosis
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 12 September 2011.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
National Research Centre for Environmental Toxicology Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 11 times in Thomson Reuters Web of Science Article | Citations
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Created: Thu, 22 Mar 2012, 10:46:00 EST by Robyne Anderson on behalf of National Res Centre For Environmental Toxicology