Pink Porites
Bob Buddemeier
bob_buddemeier at msmail.kgs.ukans.edu
Sat Apr 6 23:42:02 EST 1996
Contrary to the suggestions of some, I am not some sort of marine easter
bunny hopping from atoll to atoll with a basket of dyed Porites (I'll get you
for that, Ken).
However -- like Potts, I have very occasionally seen pinkish bands in
sectioned corals (I think non-Porites as well), but seldom uniform, bright or
common -- and usually other colors: see section on boring algae in
Buddemeier, Maragos & Knutson (1974). Radiographic Studies of Reef Coral
Exoskeletons, J. Exp. Mar. Biol. Ecol. 14:179-200.
If the lines faithfully (as opposed to just approximately) track the density
growth patterns, if they are bright and uniform, and especially if they trace
out pretty much the whole living surface at time of deposition, then I would
check with any other scientists working at the atoll and/or the JA marine ops
people to see who might have been dying or dumping material in the lagoon 1-2
years before these corals were collected -- biogenic pigment bands just
aren't that consistent.
Bob Buddemeier
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From: acohen at cliff.whoi.edu on Fri, Apr 5, 1996 12:42 PM
Subject: Pink Porites
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Subject: Pink Porites
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Dear All
I am making various geochemical measurements on Porites
colonies from Johnston Atoll, NC Pacific. On sectioning
several colonies from one of my lagoonal sites, I noticed a
bright pink line, the contours of which follow the growth
bands. In all colonies, it is situated about 1.5 cm from the
surface, below the green endolithic algae. I have never seen
this before and it seems restricted to one particular
site on Johnston Atoll. Neither samples from the reef edge
nor any other lagoonal localities nor any other genera I've
sectioned show this. Could it be a red algae ? Does anybody
have any suggestions ?
much appreciated Anne
(acohen at whoi.edu)
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