What can low salinity levels do to a coral reef ecosystem

Globally, corals occur in a salinity range between 32 and 40 PSU (practical salinity units), although coral reefs also thrive in exceptionally high and low salinity conditions. More important than average salinity concentrations, however, are sudden decreases in salinity due to high freshwater input by rivers or torrential rains. Decreased salinity is seen as a second factor for the disappearance of massive coral reefs in front of large river mouths.

Honestly I think that low salinity levels would kill the coral reef ecosystem because they need salt water to breath and survive.

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Explanation:

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.