The further elaboration on the theory of tolerance is credited to ronald good. It states that growth is dictated not by total resources available, but by the scarcest resource limiting factor. But tolerance, pittinsky notes, is but a midpoint between prejudice and positive intergroup relationsit is not the opposite of prejudice. Shelfords law of tolerance is a principle developed by american zoologist victor ernest shelford in 1931. Org teachng the new jim crow the new jim crow by michelle alexander chapter 4 the cruel hand today a criminal freed from prison has scarcely more rights, and arguably less respect, than a freed slave or a black person living free in mississippi at the height of jim crow. Shelfords law of tolerance quick reference a law stating that the abundance or distribution of an organism can be controlled by certain factors e.
Organisms may be limited in their growth and their occurrence not only by too little of an element or too low an intensity of a actor but also by too much of the element or too nigh intensity of the factors. It refers to the upper and lower bounds to physical environment an organism can tolerate. The law has also been applied to biological populations and ecosystem models. Law of the limiting factors, law of the minimum, law of.
The absence or failure of an organism can be controlled by the qualitative or quantitative deficiency or excess or any one of several factors which may approach the limits of tolerance for that organism. Law of tolerance proposed by victor shelford in 19. These boundaries affect the ability to function, grow, and reproduce. Here is your short essay on shelfords law of tolerance. Although shelfords law of tolerance is still given significant coverage in some ecology texts odum 1971, it has largely been supplanted by the concept of the niche whittaker and levin 1975, which underlies many ecological and evolutionary problems of current interest. Short essay on shelfords law of tolerance 649 words. Prejudice reduction, for instance, aims only to achieve a state of tolerance. Volume 129, number 1 januaryl987 american naturalist.
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