The magnitude of thermal variation is thought to be directly proportional to plastic capacity, such that species that have evolved in the warm, constant climate of the tropics have a lower capacity for plasticity compared to those living in variable temperate habitats.
A magnitude da variación térmica crese que é directamente proporcional á capacidade plástica, de modo que as especies que evolucionaron nun clima cálido constante tropical teñen menor capacidade de plasticidade comparada coa das especies que viven en hábitats temperados variables.