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Divers survey bleached corals at Cheeca Rocks reef at the Florida Keys National Marine Sanctuary on August 1, 2023. Video produced by NOAA.to climate-controlled labs, some were temporarily moved into deeper, cooler water, and small-scale shading experiments were conducted. In addition, live gene banking was also employed to preserve unique genetic individuals of threatened coral species.
The losses at the Mission: Iconic Reef sites underscored the importance of prioritizing preservation of genetic diversity of remaining corals over mass relocations. During extreme events, reef managers expect there to be losses but by preserving genetic diversity reef managers can rebuild impacted reefs and nurseries following these events. Resources for mass nursery evacuations are limited and the losses of outplanted elkhorn and staghorn corals surveyed over the past year were significant.
Mission: Iconic Reefs partners from Reef Renewal relocate corals from shallow water nurseries to deeper water nurseries during the 2023 summer heat wave. Video courtesy of Newman PR & Monroe County Tourist Development Council.Despite all the forward progress being made in the realm of coral restoration, some scientists believe coral restoration efforts may be futile if ocean temperatures continue to increase.Phanor Montoya-Maya dives at Pickles Reef in the Florida Keys.
Montoya-Maya stresses the importance of these passive strategies because they promote a healthy environment for corals and reefs to grow, so when a bleaching event does happen, the corals that survived by natural selection continue to thrive even after the event wanes, therefore further building resilience and adapting for the next bleaching event.“We need to be mindful that reefs take thousands of years to develop, corals take tens of years to grow into a large colony.
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