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Yellow-band disease is a bacterial infection that spreads over coral, causing the discolored bands of pale-yellow or white lesions along the surface of an infected coral colony. The lesions are the locations where the bacteria have killed the coral's symbiotic photosynthetic algae, called zooxanthellae which are a major energy source for the ...
This yellow band encroaches on uninfected tissue, thereby killing the healthy tissue. Corals, especially those of the Porites nodifera species, are able to overcome AYBD as it is often seen to halt its manifestation and become inactive prior to infecting the entire coral, allowing the coral to rejuvenate itself by building new skeletons.
The band can move across the surface of the colony at the rate of a few millimeters a day, leaving behind bleached skeletal material. [9] The physical coloration of coral is an easy way of identifying some pathogens, since many diseases are identified by their most obvious symptoms such as black band disease, white pox and yellow-band disease. [10]
Pages in category "Coral diseases" ... Yellow-band disease This page was last edited on 22 September 2021, at 19:42 (UTC). Text is available under the ...
Coral snakes are a large group of elapid snakes that can be divided into two distinct groups, the Old World coral snakes and New World coral snakes. There are 27 species of Old World coral snakes, in three genera (Calliophis, Hemibungarus, and Sinomicrurus), and 83 recognized species of New World coral snakes, in two genera (Micruroides and Micrurus).
A total of seven diseases are known to afflict C. natans, and it is one of only twenty-two coral species worldwide in which this count is higher than three. It is one of the Caribbean corals most afflicted by black band disease, and along with Montastraea spp., suffers from yellow-band disease.
Excess nutrients can intensify existing disease, including potentially doubling the spread of Aspergillosis, a fungal infection that kills soft corals such as sea fans, and increasing yellow band disease, a bacterial infection that kills reef-building hard corals by fifty percent. [34]
The surface of the coral can be considered a microbiome, an ecological community of micro-organisms. The zooxanthellae, bacteria and archaea present vary with the time of year and in the spring (but not the autumn) their composition is also affected by the health of the coral and whether it is suffering from yellow-band disease. [6]