Multiple factors→ .Factors interact Temperature additive (a)One dimension multiplicative .A single factor may limit success-(Leibig's law of the minimum) Temperature .Genetic variation (b)Two dimensions .Dynamic environments .Lags in response Food size Temperature (c)Three dimensions •Multiple factors Æ •Factors interact •additive •multiplicative •A single factor may limit success -(Leibig’s law of the minimum) •Genetic variation •Dynamic environments •Lags in response