Cultured yeast, typically selections from yeast naturally present in other, more established wine regions, behaves predictably. Particularly powerful yeast can be chosen for high-alcohol wines, those which encourage coagulation of sediment may be useful for sparkling wines. Traditionalists, however, prefer to leave everything to the ambient yeast in the belief that, while their behavior may not be quite as predictable, they add more interest to the wine’s flavour (and are certainly less likely to result in the homogenization of wine that we have witnessed over the past decade or so).