[Coral-List] Re: ReRe: [CL] Palythoa bleaching

William Allison beliamall at dhivehinet.net.mv
Wed Sep 14 12:32:20 EDT 2005


Hello James and others, Palythoa in Maldives bleaches early but seems to be
resilient.

----- Original Message ----- 
From: "James Reimer" <jreimer at jamstec.go.jp>
To: <martin.pecheux at free.fr>
Cc: <coral-list at coral.aoml.noaa.gov>
Sent: Wednesday, September 14, 2005 12:28 AM
Subject: [Coral-List] Re: ReRe: [CL] Palythoa bleaching


> Dear Dr. Pecheux and Coral List members,
>
> First off, the Burnett reference is:
>
> Burnett WJ 2002. Longitudinal variation in algal symbionts (zooxanthellae)
from the Indian Ocean zoanthid Palythoa caesia. Mar Ecol Prog Ser 234:
105-109. Let me know if you need a pdf file...
>
> As for these questions:
> > I knew the question of Palythoa in intertidal. Does the colonies in
pools at 40ーC bleach at same time of the others ???? For one side, they are
bleaching at most, for the other they are in pools ? What is this story ?
>
> As I said before, it is all anecdotal, just observations I have made while
doing other work in the field... The colonies all seem to be much more
susceptible to bleaching in summer (June-Sept) - but I have seen bleaching
in Feb in 24C water. I imagine  temperarture (as usual) would play a key
role, but I have also seen non-bleached dark brown colonies in hot tidepools
too... Length of exposure to hot (30C plus) ocean wtaer would seem to be a
key factor (like Degree Heating Week calculations perhaps). From m
> y limited observations the bleaching is "patchy" and rather random, within
colonies and areas.
>
> As for recovery, I followed a handful of palythoa colonies that happened
to be in transects I was checking monthly 2001-4, and although some of the
Palythoa bleached, I saw no mortality. Again, anecdotal evidence at best,
would have to  do some work on a larger scale to give you any kind of answer
that would be scientifically valid. I would imagine Palythoa do undergo
mortality in bleaching - would be interesting to hear about it.
>
> Sorry for the lack of solid data - zoanthids aren't a hot topic evidently.
>
> Cheers,
>
> james
>
> Martin P鹹heux wrote:
> > Dear James, all,
> >
> > Interesting.
> > What is the reference of Burnett 02 ?
> > I knew the question of Palythoa in intertidal. Does the colonies in
pools at 40ーC bleach at same time of the others ???? For one side, they are
bleaching at most, for the other they are in pools ? What is this story ?
"Sentinels" as says Dustin Kemp ("sentinels" of the reefs "canaris in the
coal mine" of Climate Change)
> > Always recovering ? I did read nothing on Palythoa recovering.
Important! Confirmation by others ?
> >
> > Thanks,
> >
> > Dr. Martin P鹹heux
> > Institut des Foraminif鑽es Symbiotiques
> > (Jussieu, Universit? Paris VI)
> > 16, rue de la Fontaine de l'Esp駻ance, 92160 Antony, France
> > martin.pecheux at free.fr
> > +33(0) 8711 804 32
> > Publications at  www.reefbase.org in which Review on Reef Bleaching,
214p.
> >
> > The 22 at 22:23 UT: Equinoxe! Moon in Ple?des, Mars at 11ー (c'est le
Temps Universel. Pour la France, + 2 heures, ? 05/09/23 00:23)
> >
> > XX % REDUCTION OF HUMAN CO2 SOURCES IN YEAR 20XX
> >
> >
> James Reimer
> *********************************************************
> JSPS Research Fellow
> Research Program for Marine Biology and Ecology
> Extremobiosphere Research Center
> Japan Agency for Marine-Earth Science and Technology
>    (JAMSTEC)
> Headquarters
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> *********************************************************
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