[Coral-List] Xetospongia muta
G.P. Schmahl
george.schmahl at noaa.gov
Tue Apr 29 11:49:08 EDT 2008
Glauco - I have made similar observations of X. muta on several occasions:
* off Elliott Key, FL (Pacific Reef, Biscayne National Park) after
hurricane Andrew (1992) in 60-70 feet
* off the lower Florida Keys (Western Sambo reef among others) after
hurricane Georges (1998) in 70-80 feet
* at the Flower Garden Banks (NW Gulf of Mexico) after hurricane
Rita (2005) in 70-100 feet
It appears that even though this sponge seems extremely "tough", it is
actually quite susceptible to breakage from wave action, even at depth.
A PDF on the impacts of hurricane Rita on the Flower Garden Banks is
available for download at:
http://flowergarden.noaa.gov/science/hurricane.html
This document has some photos of before/after impacts to a large
Xestospongia muta.
GP Schmahl
glauco150 at aol.com wrote:
>Dear listers:
>
>During a recent dive?(75-80 ft deep) in the north coast of Puerto Rico I found out?numerous Xetospongia muta totally or partially broken.??Some sponges broke flush to the substrate, others broke in different angle when compared to the next standing; there was not a clear break pattern.??On March 20-22, Puerto Rico and the USVI coasts received the impact of a powerful cold front?which produced 30-plus feet breaking waves causing significant coastal erosion.? Could it be possble that soft or weak areas of large high profile?X. muta did not resisted?such continuous?high energy swell/surge?
>
>I will appreciate any comments or references.
>
>best regards,
>
>Glauco A Rivera
>PhD candidate
>Univ. of PR-Dept. of Marine Sciences
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--
George (G.P.) Schmahl
Sanctuary Superintendent
National Oceanic and Atmospheric Administration
Flower Garden Banks National Marine Sanctuary
4700 Avenue U, Building 216
Galveston, TX 77551
(409) 621-5151 ext. 102
(409) 621-1316 (fax)
george.schmahl at noaa.gov
http://flowergarden.noaa.gov
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