LarryD @ 62 said:

“You’ve heard of “dead zones” in the oceans. These are locations where the phytoplankton growth is blooming and creating anoxic conditions on the bottom. Usually caused by runoff providing all too much nutrients for the phytoplankton. Ocean temperature is not a factor.”

This is consistent with what I’ve read on the topic. Phytoplankton happily grow over a wide temperature range. The insensitivity to temperature immediately refutes the “global warming is killing the phytoplankton line-of-nonsense”. I’ve read that the nutrients causing the ocean “dead zones” are typically agricultural run-off. That’s bad news because agricultural run-off is not something we can easily reduce without impacting food production. What spooks me most is the possibility of “too many people” being the main driver behind the reduction of phytoplankton. It concerns me that there are serious environmental issues out that are hidden behind the smoke-and-mirrors of socialist agenda driven politics.