. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. REPOPULATION OF ZOOXANTHELLAE 361 in tissues exposed to low irradiance. Colonies of M. faveo- lata exhibit a similar pattern except that Symbiodinium A and B are both common at high irradiance in these corals (Rowan and Knowlton, 1995; Rowan et 1997). Nearby at Rio Carti (a near-shore habitat; see fig. 1 in Toller et 2001), members of the Montastraea annularis complex host Symbiodinium E in tissues exposed to high irradiance and host Svmbiodiniiim C otherwise (Toller et 2001). Thus on these two reefs, corals a
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. REPOPULATION OF ZOOXANTHELLAE 361 in tissues exposed to low irradiance. Colonies of M. faveo- lata exhibit a similar pattern except that Symbiodinium A and B are both common at high irradiance in these corals (Rowan and Knowlton, 1995; Rowan et 1997). Nearby at Rio Carti (a near-shore habitat; see fig. 1 in Toller et 2001), members of the Montastraea annularis complex host Symbiodinium E in tissues exposed to high irradiance and host Svmbiodiniiim C otherwise (Toller et 2001). Thus on these two reefs, corals at shallower depths, which expe- rience both high (on the colony top, exposed to down- welling irradiance) and low (on colony sides) irradiance, typically host both high- (Symbiodinium A and/or B or Svmhiodinium E) and low- (Symbiodinium C) irradiance- associated zooxanthellae simultaneously. (On another off- shore reef. Svmbiodiniiim E also occurs in some of the deepest colonies of M. franksi. possibly as a result of sediment-associated stress [Toller et 2001]). Several observations suggest that interactions among dif- ferent taxa of Symbiodinium within one colony of Monta- straea may be dynamic. First, coral growth causes slow changes in irradiance microenvironments ( corallites moving from tops to sides of M. annularis columns), and the specificity of different zooxanthellae for different irra- diance environments (above) implies that zooxanthellar communities will change in response to these irradiance changes. Second, experimental manipulations of irradiance gradients within colonies of M. annularis hosting Symbio- dinium B and C resulted in changes in the distribution of these zooxanthellae (Rowan et 1997). Finally, the pro- portions of Svmbiodiniiim A. B, and C in Montastraea changed during a coral bleaching event (Rowan et 1997). The present study tested the ability of zooxanthellar sym- bioses in M. annularis and in M. faveolata to reestablish typica
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
