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<DIV>Flowing water would reduce risk of small-scale hotspots (measured up to
90'F) which we notice in Discovery Bay every year when temperatures regularly
reach 86-88'F around the bay towards end of Summer when the winds drop. We
notice quite a regular bleaching pattern annually involving these sorts of
temperatures.</DIV>
<DIV> </DIV>
<DIV>Also would "still" water enhance UV penetration more evenly over small
areas.</DIV>
<DIV> </DIV>
<DIV>??</DIV>
<DIV> </DIV>
<DIV>Robert Murray.</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>==========================<BR>ROBERT MURRAY BSc, FGA,<BR>Discovery
Bay Marine Laboratory,<BR>Discovery Bay, Jamaica, W.I.<BR> <BR>Tel. (876)
973 2946<BR>Fax. (876) 973 3091<BR><A
href="mailto:rmurray@infochan.com">rmurray@infochan.com</A><BR><A
href="http://www.DBML.ORG">WWW.DBML.ORG</A><BR>==========================</DIV>
<DIV> </DIV>
<DIV> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A href="mailto:carlson@soest.hawaii.edu" title=carlson@soest.hawaii.edu>Bruce
Carlson</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
href="mailto:thomassi@com.univ-mrs.fr" title=thomassi@com.univ-mrs.fr>Bernard
A. Thomassin</A> ; <A href="mailto:coral-list@coral.aoml.noaa.gov"
title=coral-list@coral.aoml.noaa.gov>coral-list@coral.aoml.noaa.gov</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, August 25, 2000 13:14</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Julian Sprung's email.</DIV>
<DIV><BR></DIV>Bernard,<BR><BR>Did you also notice that corals in areas with
swift flowing water (usually<BR>from tides) also survived better than nearby
reefs with low flows? I<BR>noticed this in Fiji on the shallow barrier
reef of the University of the<BR>South Pacific, and in Palau near the
lighthouse reef -- both are similar<BR>reef environments with strong laminar
water flow (the water is shallow<BR>enough to stand up at mid-tide, but the
current knocks you over -- I don't<BR>have a more precise current
measurement). Why would flow rate matter?<BR>Perhaps there is something
related to diffusion rates (which would increase<BR>in strong water flow)
which offers some protection during bleaching???? If<BR>Ove is right
about superoxides forming during warm water events, maybe this<BR>observation
is relevant.<BR><BR>Also, in Fiji, we noticed that reefs near river mouths
also showed good<BR>survival rates. The outer barrier reefs in Palau and
Fiji seemed to be hit<BR>the hardest.<BR><BR>Bruce<BR><BR><BR>----- Original
Message -----<BR>From: Bernard A. Thomassin <<A
href="mailto:thomassi@com.univ-mrs.fr">thomassi@com.univ-mrs.fr</A>><BR>To:
<<A
href="mailto:coral-list@coral.aoml.noaa.gov">coral-list@coral.aoml.noaa.gov</A>><BR>Sent:
Friday, August 25, 2000 6:30 AM<BR>Subject: Re: Julian Sprung's
email.<BR><BR><BR>><BR>> <A
href="mailto:Jonathan.Kelsey@noaa.gov">Jonathan.Kelsey@noaa.gov</A> wrote
:<BR>><BR>> >-Are these generally accepted concepts?<BR>> >-Can
one accurately assess coral mortality rates associated with
a<BR>bleachin<BR>> >event after "a matter of just a few days"?<BR>>
>-Are there quantitative studies showing that there is a greater
bleaching<BR>> >survival rate among corals in polluted waters versus
those in<BR>non-polluted<BR>> >water? -Any comments and/or further
discussion would be greatly<BR>appreciated.<BR>><BR>> We will presented
a poste about the subject at bali meeting. In Mayotte<BR>> Is., North
Mozambique Channel, a huge bleaching occurred in 1998 spring<BR>> (end of
summer season there) and most of 90 percent of the shallow coral<BR>of<BR>>
the barrier reefs died.<BR>> Those corals that surveyed the best are from
the muddy environnements in<BR>> bays, on fringing reef fronts and patches,
even the harbour !why ? Because<BR>> the corals living in oceanic cooler
waters of the barrier reef belt (170<BR>km<BR>> long) are less adapted to
tolerate hot waters and high level of light<BR>(some<BR>> got "sun burns"
as table acroporas). In opposite population of corals<BR>(same<BR>>
species) living in neritic coastal waters, in inner areas of the
lagoon,<BR>> are genetically more adapted to tolerate : high temperature,
turbid waters<BR>> after rainfalls, even falls of salinity. Today in
Mayotte, probably the<BR>> recovering ibn coral of the mid-lagoon patch
reefs (recruitement) is due<BR>to<BR>> larvae coming from these coastal
coral populations. These is one of the<BR>> main reasons to protect these
"special" reefs in muddy environments from<BR>> all the effects of coastal
works (marinas, dredgings, infilling of<BR>littoral<BR>> for roads,
etc...).<BR>><BR>> This is a good way for researches.. and from where
larvae that recruit are<BR>> coming.<BR>><BR>> Bernard A.
Thomassin<BR>> Directeur de recherches au C.N.R.S.<BR>><BR>> G.I.S.
"Lag-May"<BR>> (Groupement d'Int=E9r=EAt Scientifique Environnement marin
et littoral de<BR>> Mayotte")<BR>> & Centre d'Oceanologie de
Marseille,<BR>> Station Marine d'Endoume,<BR>> rue de la Batterie des
Lions,<BR>> 13007 Marseille<BR>> 9l. (33) 04 91 0416 17<BR>> 9l. GSM
06 63 14 91 78<BR>> fax. (33) 04 91 04 16 35 (0 l'attention de...)<BR>>
e-mail : <A
href="mailto:thomassi@sme.com.univ-mrs.fr">thomassi@sme.com.univ-mrs.fr</A><BR>><BR>><BR>><BR><BR></BLOCKQUOTE></BODY></HTML>