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

Martin Pêcheux martin.pecheux at free.fr
Tue Sep 13 21:50:27 EDT 2005

Dear James, all,

What is the reference of Burnett 02 ?
I knew the question of Palythoa in intertidal. Does the colonies in pools at 40°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 ?


Dr. Martin Pêcheux
Institut des Foraminifères Symbiotiques
(Jussieu, Université Paris VI)
16, rue de la Fontaine de l'Espérance, 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 Pleïades, Mars at 11° (c'est le Temps Universel. Pour la France, + 2 heures, à 05/09/23 00:23)


James Reimer a *crit :

> Dear Dr. Pecheux and coral-listers,
> Regarding your comments on Palythoa bleaching, just a few observations (mostly anecdotal) for you. From what I have seen in southern Japan, Palythoa spp. seem to vary quite a bit even from week to week in color - often with "patchy" bleaching or whole colony bleaching in summer, with no regular or obvious distribution to the bleaching (i.e. depth, lighting etc.). However, these colonies always seem to recover. Palythoa in the Indian Ocean had been shown to be flexible in their association with Symbiodinium
> (see Burnett 2002), so maybe that is affecting what I have seen in the Pacific. The other observation of note is that (at least in s. Japan) Palythoa spp. live much higher up in the intertidal zone than almost any coral or zoanthid I have seen, and in tide pools where summer water temperatures regularly exceed 40C  - and seem to be thriving. I would guess there is some kind of flexibility with symbionts allowing this..
>  Anyways, would be interested to hear about what others have seen.
> Cheers,
> James Reimer
> JSPS Fellow
> Marine Ecology and Biology Research Program
> 2-15 Natsushima
> Yokosuka, Japan
> e-mail: jreimer at jamstec.go.jp
> Message: 2
> Date: Sat, 11 Sep 2004 07:18:35 +0200
> From: Martin P?cheux <martin.pecheux at free.fr>
> Subject: [Coral-List] Palythoa bleaching ?? and ascidians ????
> To: coral-list at coral.aoml.noaa.gov
> Message-ID: <41428AAA.C748985B at free.fr>
> Content-Type: text/plain; charset=iso-8859-1; x-mac-type="54455854";
>         x-mac-creator="4D4F5353"
> Dear divers,
> Edwin Ervin (email the 9/9/05)  mentions Palythoa caribbaeorum as
> bleaching in Puerto Rico. I had just prepared this email few days
> before:
> I did not read a mention of bleaching of Palythoa spp. since a very long
> time. In the 1980s to around 〜1995, many publications quoted it as
> bleaching, and often the worst. Would it be a focus of observers on hard
> corals? or are they less? or would have they adapted? or whatever ? I
> attach some importance as they have the symbionts in the ectoderm, so
> deducing less O2 or O. radicals concentration, shorter CO2/HCO3 pathway,
> in particular during bleaching doldrum/low water agitation time (or
> could it be the reverse?). Even anecdotical reports are wellcome.
> Also, there is still just one report of bleaching of prochordate
> Ascidians (in didemids), symbiotic with the strange
> "prokaryotic-eukaryotic" Prochloron. Would some body have also observed
> it ? (in GOREAU, T. J., and HAYES, R. L., 1995. Coral reef bleaching in
> the South Central Pacific during 1994. Coral Reef Initiative, US Dept.
> State, Washington DC, USA. 201pp)
> Thanks observers,
> Dr. Martin P鹹heux
> Institut des Foraminif鑽es Symbiotiques
> 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.
> (Martin P鹹heux means King-Fishex. I am still not Web footed)

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