[Coral-List] Barrier reef bleaching

Douglas Fenner douglasfennertassi at gmail.com
Fri Mar 25 18:17:18 EDT 2016

   This article is available open-access.

   I note that the dust storm in question occurred in 2009.  Thus it seems
unlikely to be the cause of the current bleaching event on the Great
Barrier Reef.

    Cheers,  Doug

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On Fri, Mar 25, 2016 at 5:22 AM, Eugene Shinn <eugeneshinn at mail.usf.edu>

> I was just made aware of the following paper. Here is the abstract.
> Remember Aspergillus Sydowii in African dust has been implicated in
> widespread Caribbean seafan disease. Gene
> Abstract: Dust has been widely recognised as an important source of
> nutrients in the marine environment and as a vector for transporting
> pathogenic microorganisms. Disturbingly, in the wake of a dust storm
> event along the eastern Australian coast line in 2009, the Continuous
> Plankton Recorder collected masses of fungal spores and mycelia
> (~150,000 spores/m3) forming a floating raft that covered a coastal area
> equivalent to 25 times the surface of England. Cultured A. sydowii
> strains exhibited varying metabolite profiles, but all produced sydonic
> acid, a chemotaxonomic marker for A. sydowii. The Australian marine
> fungal strains share major metabolites and display comparable metabolic
> diversity to Australian terrestrial strains and to strains pathogenic to
> Caribbean coral. Secondary colonisation of the rafts by other fungi,
> including strains of Cladosporium, Penicillium and other Aspergillus
> species with distinct secondary metabolite profiles, was also
> encountered. Our bioassays revealed that the dust-derived marine fungal
> extracts and known A. sydowii metabolites such as sydowic acid,
> sydowinol and sydowinin A adversely affect photophysiological
> performance (Fv/Fm) of the coral reef dinoflagellate endosymbiont
> Symbiodinium. Different Symbiodinium clades exhibited varying
> sensitivities, mimicking sensitivity to coral bleaching phenomena. The
> detection of such large amounts of A. sydowii following this dust storm
> event has potential implications for the health of coral environments
> such as the Great Barrier Reef.
> The article is published in Marine Druges
> Article
> Aspergillus Sydowii Marine Fungal Bloom in Australian Coastal Waters,
> Its Metabolites and Potential Impact on Symbiodinium Dinoflagellates
> Aiko Hayashi 1, Andrew Crombie 2, Ernest Lacey 2, Anthony J. Richardson
> 3,4, Daniel Vuong 2, Andrew M. Piggott 5 and Gustaaf Hallegraeff 1,*
> 1 2
> 3 4 5
> *
> Institute for Marine & Antarctic Studies, University of Tasmania,
> Hobart, Tasmania 7004, Australia; aiko.hayashi at utas.edu.au Microbial
> Screening Technologies, Building A, 28-54 Percival Rd, Smithfield NSW
> 2164, Australia; acrombie at microbialscreening.com (A.C.);
> elacey at microbialscreening.com (E.L.); dvuong at microbialscreening.com (D.V.)
> CSIRO Marine & Atmospheric Research, Ecosciences Precinct, Brisbane,
> Queensland 4102, Australia; anthony.richardson at csiro.au Centre for
> Applications in Natural Resource Mathematics, School of Mathematics and
> Physics, University of Queensland, St Lucia, Queensland 4072, Australia
> Department of Chemistry and Biomolecular Sciences, Macquarie University,
> NSW 2109, Australia; andrew.piggott at mq.edu.au Correspondence:
> gustaaf.hallegraeff at utas.edu.au; Tel.: +61-3-6226-2623
> Academic Editors: Samuel Bertrand and Olivier Grovel Received: 9
> February 2016; Accepted: 3 March 2016; Published: 16 March 2016
> --
> No Rocks, No Water, No Ecosystem (EAS)
> ------------------------------------ -----------------------------------
> E. A. Shinn, Courtesy Professor
> University of South Florida
> College of Marine Science Room 221A
> 140 Seventh Avenue South
> St. Petersburg, FL 33701
> <eugeneshinn at mail.usf.edu>
> Tel 727 553-1158
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Douglas Fenner
Consultant, corals, coral reefs, coral identification
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