See the lines?...they go up they go down, they go up they go down, they go up, they go down...

I can't believe you don't get it. It doesn't have anything to do with the argument of global warming of the waters, as this chart illustrates water temperatures have swung high and low for decades. The argument is that in the years where water temperatures are warmer (not because of climate change but because those years were warmer on record) it allowed them to look at the blooms and see they don't fair well during those years, just as they look at the years that are cooler and can tell the blooms exceed expectations....BUT...all of a sudden it didn't matter if it was cooler or warmer the bloom activity increased massively so they went looking for the cause. This article has nothing to do with arguing if the ocean level is warming due to global warming, this article is telling you that bloom booms are caused by man who keep cutting down rain forrest, which
coincidental has been well documented for decades to change the precipitation levels...(which by the way everyone knew way before "climate change" cliche's happened) this change in participation with increased fertilization run off is their hypothesis of the cause.