[Coral-List] Strange Xestospongia muta damage
kristenhoss at yahoo.com
Wed Apr 30 07:54:05 EDT 2008
Are you referring to the cable drag that occurred and sawed off 27 acres of reef a while back? What you are describing is exactly what happened during a dredging project off the coast of Pompano Beach, FL and many of the sites were repaired. However, the severed sponges did not fare as well as the corals and much of the restoration on those sponges failed. That left behind what you are describing.
Thomas Goreau <goreau at bestweb.net> wrote:
Several years ago in Broward County local divers began noticing
Xestospongia muta that looked as if they had been cut off flat near
the bottom as if cut with razor wire. It was so common that local
divers thought someone was stealing their big sponges, unlikely as
that seems. I saw them myself with Dan Clark, and there was no
jagged edge as would happen with a knife cut, anchor dragging, or
turtle chomping, but luckily almost all were healing. I've taken
samples of diseased Xestospongia in the past for microbial analysis,
and know how hard it is to cut a small piece out of them, even of
necrotic tissue, so we were baffled. Luckily there was a short
intense episode of this damage, and it does not seem to have
recurred. Who, why, or when are mysterious, but at least we know where.
Thomas J. Goreau, PhD
Global Coral Reef Alliance
37 Pleasant Street, Cambridge MA 02139
goreau at bestweb.net
Date: Sun, 27 Apr 2008 15:04:06 -0400
From: glauco150 at aol.com
Subject: [Coral-List] Xetospongia muta
To: coral-list at coral.aoml.noaa.gov
Message-ID: <8CA76B0998FBB32-BAC-4281 at mblk-d30.sysops.aol.com>
Content-Type: text/plain; charset="us-ascii"
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.
Glauco A Rivera
Univ. of PR-Dept. of Marine Sciences
Coral-List mailing list
Coral-List at coral.aoml.noaa.gov
Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.
More information about the Coral-List