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The coral seems to want to repair itself quickly and grow   the ideal length of time needed to acclimate each species
                                      back over its lost ground before something else takes its   to make them less attractive to hungry fish. If success-
                                      territory. But it wasn’t until Mr. Page was hired in 2011   ful, they plan to use their nursery-raised corals to restore
                                      that Dr. Vaughan first applied this insight to the large-  other degraded reef sites throughout the Keys and train
                                      scale production of massive corals.      others to set up their own coral factories. And while other
                                                                               scientists have been enthusiastic about the project, such
                                      Mr. Page raised corals in an aquarium as a teenager in   as Bill Causey, a coral expert who oversees all federal ma-
                                      Buffalo.  He  knew  that  hobbyists  and  live-coral  deal-  rine  sanctuaries  in  the  Southeastern  United  States, the
                                      ers routinely split growing colonies into pieces to sell   Gulf of Mexico and the Caribbean for the National Oce-
                                      or trade. “This was something that could be done,” he   anic and Atmospheric Administration, who commented
                                      said. “I had done it as a hobbyist. It was a chance to ap-  stating that “this is easily the most promising restoration
                                      ply what I had done on a much larger scale and actually   project that I am aware of,” he also added that “Dave and
                                      accomplish something big.” Three years later, he said, he   Chris are buying us time,” he added. “This will keep cor-
                                      can produce 1,000 microfragments just one centimeter   als out there” until “we can come to understand what is
                                      square (one-sixth of a square inch) in four days. And with   happening to coral on the larger scale.”
                                      more space and adequate funding, he added, “the sky’s
                                      the limit.” More than a year after they were transplanted   OTHER KEY PROJECTS
                                      to offshore test sites, 134 of 150 colonies grown from mi-
                                      crofragments continue to flourish, Mr. Page said.  Dr. Vaughan’s team has not stopped at using microfrag-
                                                                               menting to repopulate damaged reefs. The Summerland
                                      Mote scientists won federal approval to begin their most   Key team is also running water temperature simulations
                                      ambitious project yet — to create a living coral thicket on   of  expected  water  temperatures  20  years  and  50  years
                                      the limestone skeleton of a dead reef half a mile off Big   from now to see which coral species can withstand the
                                      Pine Key, just east of Key West. They have started plant-  higher expected temperatures. This is a tricky analysis
                                      ing 4,000 nursery-raised corals — symmetrical brain,   because it involves not only the coral but also the zoox-
                                      boulder star, great star and massive starlet  — on the   anthellae that live within the coral tissue and provide the
                                      2.5-acre test site. Those species will join more than 1,000   color and energy for the living coral.
                                      staghorn coral raised in Mote’s offshore nursery by a team
                                      led by another staff scientist, Erich Bartels. The goal, Dr.   Understanding and identifying which species have the
                                      Vaughan said, is to create “in a very short period of time a   best potential to tolerate expected higher water tempera-
                                      reef like the reefs we remember” from decades ago.  tures is where the coral growth and restoration efforts
                                                                               should focus.
                                      The project, among the largest coral restorations ever at-
                                      tempted, is the first large-scale effort in the Keys, and one   The growth of coral in test tanks could also identify a
                                      of the few in the world, to restore massive corals in the   strand within a family of coral  that has a set of genes
                                      wild, Dr. Vaughan said. It is partly supported by a $35,000   for both the coral and zooxanthellae that can tolerate el-
                                      grant from the Field Museum of Natural History in Chi-  evated water temperatures.
                                      cago. Planting will continue indefinitely. The researchers
                                      want to identify the corals that fare best, and to determine
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