It's easy to forget that coral is not a plant, but an animal. So stories like this are an eye-opener. Consider a quote from yesterday's New York Times: "As Dr. Hagedorn and her assistant watched, one coral tightened its mouth and seemed to exhale, propelling a cloud of sperm into its bath with surprising vigor. The water bubbled like hot oatmeal." The voyeurism of Smithsonian scientist Dr. Mary Hagedorn is for a good cause: to restore and rebuild the world's coral reefs (2nd and 3rd images, reefs in Florida), which may be devastated by 2050 due to several causes:
- Global climate change (graphic here) is warming the oceans and making corals vulnerable to disease and bleaching, a condition in which the stressed organisms expel the algae critical to their food supply.
- Carbon dioxide levels are rising and acidifying the oceans, weakening coral skeletons and inhibiting their growth.
- Budgetary constraints limit efforts to study the reefs (1st image, the underwater Aquarius Reef Base in the Florida Keys National Marine Sanctuary), establish protected refuges for existing coral, raise it in captivity, and reintroduce it into its natural habitat.
- Overfishing damages reefs directly, but also causes a shift in the reef ecosystem.
- Pollution also alters the ecosystem, for instance introducing runoff that causes massive algae growth that blocks sunlight and depletes oxygen.
- Coastal development