Current thinking on how the Toxoplasma gondii parasite invades its host is incorrect, according to a study published today in Nature Methods describing a new technique to knock out genes. The findings could have implications ...
Definition. Coral bleaching is a process whereby the coral colonies lose their colour, either due to the loss of pigments by microscopic algae (zooxanthellae) living in symbiosis with their host organisms (polyps), or because these zooxanthellae have been expelled.
Aerial views of The Great Barrier Reef are seen from above on August 7, 2009 in Cairns, Australia. GREAT BARRIER REEF, Australia A writer has declared the Great Barrier Reef in Australia officially dead after a story in September said that the bleaching of the reef's coral this year has caused it to decline. ABC News in Australia reported last month that bleaching had killed 35 percent of coral in the central and northern parts of the reef.