Which fermentation characteristic is observed in lagers as compared to ales?

The characteristic observed in lagers compared to ales is longer fermentation duration. Lagers typically undergo a more extended fermentation process due to the nature of the yeast used and the fermentation temperature. Lager yeast (Saccharomyces pastorianus) ferments at cooler temperatures, often between 45°F to 55°F (7°C to 13°C), and this cooler environment slows down the yeast's activity compared to ale yeast (Saccharomyces cerevisiae), which ferments at warmer temperatures.

This slower fermentation not only contributes to the way flavors develop in lagers, favoring a clean and crisp profile with fewer fruity esters and phenols than ales but also allows for a longer conditioning period, which can lead to a more refined and stable final product. Thus, the fermentation duration for lagers is typically longer, allowing for thorough attenuation of sugars and maturation of flavors.