Question

Which of the following can be a trigger for Coral Bleaching?

Codes :

• A. 1 and 4 only
• B. 1, 2 and 4 only
• C. 1,2,3 and 4 only
• D. All of the above

Answer 1

The correct option is D

All of the above

Coral bleaching is theorized to be a generalized stress response of corals that may be caused by a number of biotic and abiotic factors, including:

• increased (most commonly), or reduced water temperatures
• oxygen starvation caused by an increase in zooplankton levels as a result of overfishing
• increased solar irradiance (photosynthetically active radiation and ultraviolet light)
• changes in water chemistry (in particular acidification)
• increased sedimentation (due to silt runoff)
• bacterial infections
• changes in salinity
• herbicides
• low tide and exposure
• cyanide fishing
• elevated sea levels due to global warming
• mineral dust from African dust storms caused by drought
• four common sunscreen ingredients, that are non biodegradable, and can wash off of skin.