The article mentions that the water helps regulate the solar array temperature, ostensibly because the water is used as a heat sink. Does the thermal equation even out such that the body of water temperature is not dramatically impacted? Example: If the solar panels are absorbing sunlight before it can reach the water, the water would be colder. But, if the solar panels are using the water as a heat sink/cooler, the water temp could be brought up in temperature.

And what about the blockage of the light? That will inhibit growth of algae and plants underwater.

I can see how this might be super useful for man-made bodies of water (for drinking, runoff, etc) but it seems it might be a bit impactful on natural bodies of water.