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.
These threats include increasing atmospheric carbon dioxide which leads to a decrease in coral growth, increasing sea temperatures which leads to coral bleaching, possible increased river outflow causing low salinity and high pollution and damage from tropical cyclones (ABS 2006).