I know there are a lot of different species of algae and that each one has different environmental tolerances. I've seen data on different species:
- brown alga Sargassum echinocarpum J. Agardh - grows well at 35°
- Dictyopteris australis - grows poorly above 28°
- halophilic blue-green algae A. fertilissima - temperatures of 47° stimulates germination
What's the highest temperature that growing algae or its spores can survive at? In other words, what temperature would guarantee that no algae could grow afterwards unless reintroduced?