You need to read things more critically. Ask yourself, "can it really be true that total ocean phytoplankton have declined by 50%"? If it were true, what else would be true? It's the base of the food chain. One would see huge effects everywhere in the oceans. It's inconceivable that this would be reported just in some minor CBC news report. It's got to be that (at most) there's just a local decline in some spot off Newfoundland.
You've also grossly mis-read the article on vitamin B1 deficiency.
And, you ask "if humanity survives the climate crisis"? There is no prospect that the "climate crisis" will lead to human extinction. (Humans might manage to go extinct for some other reason, like an out-of-control bioweapon, but not for a reason closely linked to climate change.) You have been paying too much attention to quasi-religious apocalyptic propaganda.
You've also grossly mis-read the article on vitamin B1 deficiency.
And, you ask "if humanity survives the climate crisis"? There is no prospect that the "climate crisis" will lead to human extinction. (Humans might manage to go extinct for some other reason, like an out-of-control bioweapon, but not for a reason closely linked to climate change.) You have been paying too much attention to quasi-religious apocalyptic propaganda.