theory about yeast fermentation temperatures

[elsphinc]

so why is it that yeasts being a living thing, present in almost all environments, are effected by temperature fluctuations. are they not set up to adapt to temperature changes such as my outside shed. wouldnt a wild yeast be best fermenting at a varying temperature, as dictated by environment? In otherwords should i be worried about my fermentation temps. I enjoy my beer. My temps dont fluctuate much but im more interested in my theory of the organic nature of yeast.

 

[Paps]

There are certain `off flavors` produced if temps run a bit warm.
Some styles those off flavors can work for.
Others not so much.
Some off flavors....not at all.
You wouldn't want your light lager to taste of buttered popcorn now would you?

 

[butterpants]

If i was forced to eat Mexican food every night, I'd poop alot more.

 

[blastfemur91]

While yeast can proliferate under a wide range of conditions, there are optimal conditions for growth. The more the yeast has to adjust to temp changes the less efficient it will be at fermentation

 

[garcia]

Go for a jog at Death Valley this summer, then catch a plane to Antarctica and take a jog there.

 

[MichaelBrock]

There is a distinction between "best temperatures for yeast growth" and "best temperatures for beer flavor". Most yeasts grow better at higher temperatures but also produce off-flavors when fermenting at those temperatures. What's better for the yeast isn't necessarily better for the beer.