Bell-shaped curve of biology (Shelford's law of tolerance)

Topic

The bell-shaped curve of biology, most formally represented by Shelford's law of tolerance, depicts the relationship between the intensity of an environmental factor and a species' survival or performance. It illustrates that organisms have specific minimum, maximum, and optimum limits for abiotic factors, with the peak of the bell representing the optimal zone for population success. Outside of this optimal range, organisms experience physiological stress, eventually reaching zones of intolerance where they cannot survive.