[Coral-List] Coralimorph problem in Palmyra

Albert Norstrom albert at ecology.su.se
Wed Apr 7 09:15:43 EDT 2010

Hi Forest and all others,

We're currently undergoing experiments on Zanzibar to discern the 
potential drivers (N,P,Fe exposure or loss of top-down control) of 
corallimorph expansions. One interesting, and unexpected, observation by 
my master student (who's on site) is that corallimorphs in experimental 
plots on the reef were predated by a species of seastar. Communication 
with her is sporadic and so I haven't received photos or any detailed 
identification of the critters responsible, but I could do so as soon as 
I receive more info.

Corallimorpharian dominated reefs were one of the persistent alternative 
states we identified in a MEPS review from last year 

Best regards,

Forest Rohwer wrote:
> The reef around a wreck of the longliner on Palmyra is doing really poorly.
> A coralimorph (Rhodactis) has completely taken over the area.  The colonies
> cover over 80% of the benthos, independently of what was underneath.  The
> concerning part is that it is spreading rapidly across the shallow western
> terrace of the island.  The spread is really quick and it is starting to
> invade some of the most beautiful and intact reefs left on the island.
> Jim Maragos has an article on this:
> http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0002989
> Ideas about how to kill the coralimorph would be greatly appreciated.
> Forest Rohwer
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> Coral-List at coral.aoml.noaa.gov
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Albert Norström, PhD
Stockholm Resilience Centre & Albaeco
Stockholm University

Kräftriket 2A
104 05 Stockholm

Tel: +46 (0)79 54 63 74
Email: albert at ecology.su.se
Sustainable development update blog: www.sdupdate.org

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