Around the world, coral reefs have drastically declined due to coastal
development, increased water temperatures and storm frequency, global
climate change, disease, pollution, and overfishing. In particular,
populations of the threatened staghorn coral (Acropora cervicornis)
have declined by up to 95% in the Caribbean. To help combat the
continuing decline of staghorn coral and assist in their recovery, the Benthic Ecology Lab at the Rosenstiel School
is growing corals at an in-water coral nursery to use in restoration
activities. The coral nursery is located just east of Boca Chita Key
within Biscayne National Park, about a 45-minute boat ride south from
the RSMAS dock.
Staghorn coral reproduces naturally through the process of
fragmentation, so we collect small pieces of coral called fragments from
wild colonies and place them in a coral nursery. The
nursery is constructed of cinderblock platforms with 10 pedestals where
coral fragments are secured with underwater epoxy. Once secured in the
nursery, staghorn fragments can grow up to 15 cm per year. When the
fragments have grown to about 30 cm, they can be fragmented again to
create more fragments without needing to collect more from wild
colonies.
Currently, there are 542 small staghorn coral colonies at the RSMAS
coral nursery totaling over 250 meters of healthy coral tissue. The
coral nursery attracts many fish and invertebrate species such as
snapper, grunts, urchins, lobster, and squid. SCUBA divers regularly
clean the nursery with wire brushes to prevent algae and other
encrusting organisms like sponges from overgrowing the corals. This
process, known as “coral gardening” produces a sustainable, healthy
stock of corals which can be transplanted to local coral reefs to help
replenish declining staghorn populations. Corals from the RSMAS coral
nursery are planned to be outplanted in Spring 2012.
-Stephanie A. Schopmeyer
Senior Research Associate
Senior Research Associate
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