[Coral-List] Palythoa discussion

[Dawn Phillip]

Hi Dusty

Yes, I was fascinated by the fact that Palythoa had a greater tendency
to bleach in the part of the reef that it dominated.  We haven't looked
at the reef slope as yet as we are waiting for the brief period of clear
water (about 2 weeks in August/September).  The visibility is horrible
(<<1 m) and it is very rough getting out there

Thanks everybody for the refs. I'll have a read and consolidate my
thoughts

Dawn

-----Original Message-----
From: coral-list-bounces at coral.aoml.noaa.gov
[mailto:coral-list-bounces at coral.aoml.noaa.gov] On Behalf Of dustin kemp
Sent: Monday, March 17, 2008 4:23 PM
To: coral-list at coral.aoml.noaa.gov
Subject: [Coral-List] Palythoa discussion




 Hi
Dawn, 




Interesting observation concerning
differences in Palythoa bleaching from inshore vs. offshore colonies. 
This acclimatization process has been shown with Palythoa caribaeorum
(and
their zooxanthellae types C1 & D1a) on a geographic scale in S. Florida
(Kemp, DW, et al.
Journal Experimental Marine Biology and Ecology. 2006).  We found
that P. caribaeorum from regions with larger annual temperature ranges
did not
bleach as much as P. caribaeorum with smaller annual temperature ranges.

I know this has also been seen in corals as well (Cook et al. Coral
Reefs,
1990; among others).



 
An interesting observation that I could
never figure out during this project is why along the east coast of
Florida (up
to West Palm Beach) you can find P. caribaeorum right off the beach but
in the
FL Keys to find P. caribaeorum you must go offshore past Hawks channel
(appx
> 2-3 miles out).  Even on patch reefs inside of Hawks channel I was
unable to find P. caribaeorum.

 

Cheers, Dusty


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