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ReportsFlexibility in Algal Endosymbioses Shapes Growth in Reef Corals
The relation between corals and their algal endosymbionts has been a key to the success of scleractinian (stony) corals as modern reef-builders, but little is known about early stages in the establishment of the symbiosis. Here, we show that initial uptake of zooxanthellae by juvenile corals during natural infection is nonspecific (a potentially adaptive trait); the association is flexible and characterized by a change in (dominant) zooxanthella strains over time; and growth rates of experimentally infected coral holobionts are partly contingent on the zooxanthella strain harbored, with clade Cinfected juveniles growing two to three times as fast as those infected with clade D.
1 School of Marine Biology and Aquaculture, James Cook University (JCU), Townsville 4811, Australia.
2 Australian Institute of Marine Science (AIMS), PMB 3 MC, Townsville 4810, Australia. * To whom correspondence should be addressed. E-mail: Bette.Willis{at}jcu.edu.au
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Science. ISSN 0036-8075 (print), 1095-9203 (online)