[Coral-List] re: Palythoa/zoanthid bleaching
dustin kemp
dustykemp2 at hotmail.com
Tue Sep 13 10:56:39 EDT 2005
Regarding the discussion on Palythoa bleaching: Our work on Palythoa
caribaeorum from three regions in south Florida (Palm Beach, Ft.
Lauderdale and Lower Florida Keys) showed that colonies of P.
caribaeorum (sampled at 3-5 m) associate with Symbiodinium types C1
and/or D1a. Experimental bleaching results revealed no significant
difference in released algae based on symbiont type, but did show
significant algae release based on region. The work is currently
submitted and in review.
Cheers, Dusty
Dustin Kemp M.S.
Institute of Ecology
University of Georgia
Athens, GA 30602
(706)542-0279
dkemp1 at uga.edu
______________________________________________________________
From: "Jaap, Walt" <Walt.Jaap at MyFWC.com>
To: "James Reimer"
<jreimer at jamstec.go.jp>,<Coral-List at coral.aoml.noaa.gov>
Subject: RE: [Coral-List] re: Palythoa/zoanthid bleaching
Date: Tue, 13 Sep 2005 08:20:21 -0400
>In the region of the Florida Keys to as far north as Stuart,
Florida (24.4 to 27.1 N latitude) Palythoa is a common constituent
of the shallow reefs. Since the 1970s, when seawater temperatures
approach 30 degrees C, Palythoa becomes pale yellow to white. It
often times retracts the polyps to the point that they are hardly
visible. It is one of the first sentinels of a bleaching episode.
When temperatures exceed 31 degrees C, it turns ghost white. We
tend to refer to the common species in our region as Palythoa
mammillosa, please see: Cairns, S.A., et al., 2002. Common and
scientific names of aquatic invertebrates from the United States
and Canada: Cnidaria and Ctenophora. Second Edition. American
Fisheries Society. Special Publication 28. 115 pages.
>
>-----Original Message-----
>From: coral-list-bounces at coral.aoml.noaa.gov
[mailto:coral-list-bounces at coral.aoml.noaa.gov] On Behalf Of James
Reimer
>Sent: Monday, September 12, 2005 9:03 PM
>To: Coral-List at coral.aoml.noaa.gov
>Subject: [Coral-List] re: Palythoa/zoanthid bleaching
>
>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 JAMSTEC
>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 Pêcheux
>Institut des Foraminifères Symbiotiques
>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.
>
>(Martin Pêcheux means King-Fishex. I am still not Web footed)
>
>XX % REDUCTION OF HUMAN CO2 SOURCES IN YEAR 20XX
>
>
>------------------------------
>
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