Summary: Ale is beer fermented with Saccharomyces cerevisiae strains, which generally work at warmer temperatures than the strains used for lager.
Reference: Saccharomyces cerevisiae in the Production of Fermented Beverages (opens in a new tab)
Abertay University · Reference checked 21 July 2026
Where to look: PDF page 2, Table 1, and page 3
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