Researchers found hopeful results when testing future climate change conditions to coral reefs. Discover more by clicking the link below.
Commonly referred to as the “canaries in the coal mine” for global warming, sea coral survive in a narrow range of conditions. And changes in environmental conditions can do irreparable harm to corals.
Like the silence of the canary in a coal mine, the death of sea corals is a heartrending metaphor. When the canary stops singing or the corals die, something good and innocent has been forever lost. If we don’t want to lose more life, we must act now. And if we do, there may be hope.looked at three common coral species to see how they would fare under the warming and acidification conditions expected later this century.
Researchers conducted the experiment outside, with natural seawater from the reef that circulated through the tanks. They also mimicked natural daylight and temperature fluctuations.
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Predicting coral metapopulation decline in a changing thermal environment - Coral ReefsThermal stress is expected to compromise the persistence of tropical corals throughout their biogeographic ranges, making many reefs inhospitable to corals by the end of the century. We integrated models of local predictions of thermal stress throughout the coming century, coral larval dispersal, and the persistence of a coral’s metapopulation(s) in the Caribbean to investigate broad trends in metapopulation fragmentation and decline. As coral reef patches become inhospitable throughout the next century, the metapopulation of Orbicella annularis is predicted to fragment, with sub-networks centered around highly connected patches and thermal refuges. Some of these are predicted to include the reefs of Colombia, Panama, Honduras, Guatemala, Belize, Southern and Northern Cuba, Haiti, and the Bahamas. Unknown coral population demographic parameters, such as lifetime egg production and stock-recruitment rates, limit the model’s predictions; however, a sensitivity analysis demonstrates that broadscale patterns of fragmentation and metapopulation collapse before the end of the century are consistent across a range of potential parameterizations. Despite dire predictions, the model highlights the potential value in protecting and restoring coral populations at strategic locations that are highly connected and/or influential to persistence. Coordinated conservation activities that support local resilience at low coral cover have the potential to stave off metapopulation collapse for decades, buying valuable time. Thermal refuges are linchpins of metapopulation persistence during moderate thermal stress, and targeted conservation or restoration that supports connectivity between these refuges by enhancing local population growth or sexual propagation may be critically important to species conservation on coral reefs.
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