Tag: "corals" at biology news
Scientists Urge Further Study Of Alarming Coral Reef Decline
...arch into the potentially seriousproblem. The corals
are at the center of a complex food web. Whenthey ...ental Health. "We are pointing out that these corals
are dying all overthe world," Ostrander said. Scientists do not know what iscausing the coral reef d...
At Life's Most Sensitive Stage, Embryos Cope With Stress
...anding mysteries about organisms like sea urchins, corals
and seaweed,that depend on the vagaries of current and tide to get sperm and egg togetherclose enough for fertilization to begin. Previous studies assumed that these organisms release huge numbers ofreproductive cells, or gametes, when water is turbu...
USGS Measures Coral Reef Recovery In Culebra, Puerto Rico
...were overturned andfragmented. Finger and staghorn corals
were also greatly affected. Largequantities of these delicate branching corals
had been reduced to gravel-sizerubble, forming steep slopes that buried other corals. Despite exten...
Bleached Coral Could Be Environment Warning
ANAHEIM, CALIF. -- The dying corals
of the Florida Keys could be an earlywarning of to...ityecologists worry. The reason: Hundred-year-old corals
are succumbing todiseases they previously survived. Increasing global temperatures and worsening pol...
Marine Life In South Pacific Region Found To Be Impervious To Oceans' Highest Arsenic Levels
...te of the extreme concentration, "the skeletons of corals
and the shellsof clams do not show elevated concentrations of arsenic when compared tospecimens collected from outside Tutum Bay," says Pichler. "Two mechanisms seem to efficiently control and buffer the arsenicconcentration," according to Pichler....
Heat damage to "photosynthesis engine" in symbiotic algae may be among major causes of coral bleaching
...tures aren't necessarily damaging thereef-building corals
directly but instead are degrading the ability ofs...ts conduct research. "However, if the algae in the corals
areunhealthy or stressed, the hosts either expel or digest them." The underlying biochemical causes ...
Biologists predict more marine disease
... with herpes virusimported in aquaculture feed and corals
killed by a soil-borne fungus are among34 organism...ducing a a volatile mix that may threaten tropical corals
and temperatespecies alike," said C. Drew Harvell, a Cornell University associate professorof ecolog...
Researchers characterize mollusk insulin gene, find unique peptide
...of whichremains unknown. "Almost all animals, from corals
to humans, make and use insulin as a hormonalcontrol of metabolism," said Jonathan Sweedler, a professor of chemistry and aresearcher in the university's Beckman Institute for Advanced Science andTechnology. "Although the presence of an insulin gene...
Destroying coral reefs
...m bleaching, which occurs when warmer waters force corals
to expel their symbiotic algae. During the 1997-19...reef calcification." If current trends continue, corals
may become too fragile to support reef structures as we know them, says Kleypas. There is no evidenc...
Ill winds carry toxic dust
...ne biologists blamed the rapid demise of Caribbean corals
on attacks by a fungus carried in Saharan dust. Droughts in Africa are causing larger, more frequent dust storms, some of which produce clouds of fine dust covering thousands of square miles. Trans-Atlantic winds can carry the dust to North America a...
Study says bleaching could be a hidden strength for corals
...al phenomenon of bleaching, in which reef-building corals
lose their colorful algae and become white during times of stress, may actually allow some corals
to adapt to global warming and other environmental change.The study, conducted by the New York-based...
July media highlights: GEOLOGY and GSA TODAY
...pplied new and sophisticated dating mechanisms for corals
in the Caribbean. What they learned was that a coral extinction occurred at 1.0 - 0.9 million years ago, much more recently than had been previously thought. The date of the extinction, however, now nicely coincides with global changes associated w...
Climate change and coral reefs
...ause the rising sea levels provided more space for corals
to grow into, while the warmer oceans opened up la...armer seas and rising sea levels could be good for corals
- its all a matter of timing. They could do well in a warmer world as long as the rate of warming ...
Famous coral reefs damaged due to global warming will take a century to recover, says new research.
...ratures averaged at 28 degrees. "This caused the corals
to die, and damage like this can only be rectified over the long term - we think about 100 years." Divers from all over the world enjoy the spectacular natural environment at Rangiroa. As well as the coral reefs, it has one of the most wide ranging...
Cover story in Science reveals historical overkill of marine Megafauna triggered current ocean crises
...orida Keys. The potential for reducing diseases of corals
and turtlegrass by restoring natural levels of grazing is unproven but consistent with historical evidence. Historical data not only help clarify underlying cause and rates of ecological change, but they also demonstrate achievable goals for restora...
Across the countryside: How ecology predicts the movement of parasites and disease
...of fungal disease (Aspergillus sydowii) on sea fan corals
(Gorgonia ventalina) in the Florida Keys. They will discuss the effects of temperature on both the fungus and the coral, and the implications of these findings on the entire Caribbean reef system. Some types of bacteria also maintain the ability to ...
Chemical pollution and human sewage could be killing corals
...hers George Bonheyo and Jorge Frias-Lopez, studied corals
off the island of Curacao in the Netherlands Antil...ress due to pollution, which in turn decreases the corals
resistance to bacterial infection.Healthy corals
contain a natural population of bacteria within a m...
The new biology of rocks: 'Are there medical implications of geomicrobiology?'
...ation. Black-band disease, which has been killing corals
in the oceans, may be caused or exacerbated by cyanobacteria, which normally dwell as part of phytoplankton in the ocean. Salyers was part of a research team, led by UI geologist Bruce Fouke, that reported in December that these bacteria might be te...
Corals are being robbed of light
...Symbiotic algae called zooxanthellae living in the corals
photosynthesise to produce carbohydrates and oxygen that the corals
use to make reef-building calcium carbonate. If waters become less transparent this process is harme...
Twelve new coral and fish species discovered off Madagascar
...quires as much attention." The number of described corals
known to exist in Madagascar was nearly doubled du...ral reefs consist of plants and animals, primarily corals
that surround their small tentacles in a hard skeleton that forms much of the reef structure. They ...
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