What characteristic is known for Saccharomyces pastorianus?

Saccharomyces pastorianus, often referred to as bottom-fermenting yeast, is specifically known for its ability to ferment at lower temperatures compared to other yeast strains. This characteristic makes it particularly well-suited for lager production. Lager yeast typically thrives in cooler temperatures ranging from 45°F to 55°F (7°C to 13°C), which contrasts with ale yeast strains that prefer warmer fermentation environments.

This lower fermentation temperature helps produce beers that are cleaner and crisper in flavor, as well as less fruity and estery compared to those made with top-fermenting yeasts. The temperature range and fermentation characteristics of S. pastorianus are critical for achieving the distinct profile of lager beers, which often emphasize malt and hop flavors rather than fruity esters. This foundational knowledge about yeast behavior is essential for brewing practices and contributes significantly to the understanding of different beer styles.