Cook,-C.B.; Logan,-A.; Ward,-J.; Luckhurst,-B.; Berg,-
	C.J.,Jr.  Elevated temperatures and bleaching on a high 
	latitude coral reef: The 1988 Bermuda event.  CORAL-
	REEFS. 1990. vol. 9, no. 1, pp. 45-49.

Survey transects in Bermuda in 1988 on 4-6 reefs located on 
the rim margin and on a lagoonal patch reef revealed 
bleaching only of zooanthids between May and July. Transect 
and tow surveys in August and September revealed bleaching of 
several coral species; Millepora alcicornis  on rim reefs was 
the most extensively affected. This bleaching period 
coincided with the longest period of elevated sea 
temperatures in Bermuda in 38 years (28.9-30.9 degree C 
inshore, > 28 degree  offshore). By December when 
temperatures had returned to normal, bleaching of 
scleratinians continued, but bleaching of M. alcicornis  on 
the outer reefs was greatly reduced. Our observations suggest 
that corals which normally experience wide temperature ranges 
are less sensitive to thermal stress, and that high-latitude 
reef corals are sensitive to elevated temperatures which are 
within the normal thermal range of corals at lower latitudes.