May, R.M. ( 1975) Patterns of species abundance and diversity, in M.L. Cody and J.M. Dia ond ( gy and Evo lutio n o f Co mmunities , Harvard University Press, Ca bridge MA, pp. 81-120.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....but from an increase in diversity with increasing habitat availability. Specifically, we study species abundance patterns, with a provisional definition of species as a unique agent genotype. Species diversity in ecological communities is arguably the single most interesting ecological variable [3, 25, 32, 33]. One reason for this interest is the overwhelming number of species found on Earth; approximately 30 million species live today, and a great many more have lived and suffered extinction [4, 44] A second reason is that species diversity is believed to play a role in the stability of ecosystems to ....

....so we report detailed results only for the species area scaling relation. 3.1 The Preston Distribution When sampling experiments are performed on natural ecosystems, a common result is that most species sampled have few representatives. That is, most species are rare, but a few are common [3, 4, 32, 41]. Preston s canonical log normal distribution is the most widely accepted formalization of the relative commonness and rarity of species, but see [38] for a discussion of alternative schemes. When species counts are plotted on linear axes, the distribution is unimodal and right skewed with an ....

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May, R. M. (1975). Patterns of species abundance and diversity. In M. L. Cody & J. M. Diamond (Eds.), Ecology and evolution of communities (pp. 81--120). Cambridge, MA: Harvard University Press.

....create new niches, in such a way that all the aforementioned elements are related with each other. In itself, the study of the evolution of diversity and the factors that have an influence on it is interesting for several disciplines, something already pointed out by Margalef in 1986 [2] May [3] has applied it to human population and wealth distribution in the USA and the UK, Aguila [4] to the evolution of pottery designs, in itself a problem of cultural evolution, and it could probably be applied to other problems like the evolution of markets and products along with consumers. Similar ....

....abundance distributions, the abundance versus rank of the species is plotted. This is called a rank abundance graph. Usually abundance is plotted in logarithmic scale, in such a way that ecosystems fall into one of four distributions: geometric, logarithmic, normal logarithmic and broken stick [3]. In the geometric distribution [12] species abundance follow a geometric sequence. This distribution follows from the niche preemption hypothesis, which asserts that each species uses the same portion k of the resource available to it. The first species uses k, the second the same portion k of ....

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Robert M. May. Patterns of species abundance and diversity. In J. M. Diamond M.L. Cody, editor, Ecology and Evolution of Communities, pages 81--120. Harvard university press, 1975.

....but from an increase in diversity with increasing habitat availability. Specifically, we study species abundance patterns, with a provisional definition of species as a unique agent genotype. Species diversity in ecological communities is arguably the single most interesting ecological variable [25, 32, 33, 3]. One reason for this interest is the overwhelming number of species found on Earth; approximately 30 million species live today, and a great many more that have lived and suffered extinction [4, 44] A second reason is that species diversity is believed to play a role in the stability of ....

....so we report detailed results only for the species area scaling relation. 3.1 The Preston Distribution When sampling experiments are performed on natural ecosystems, a common result is that most species sampled have few representatives. That is, most species are rare, but a few are common [41, 32, 3, 4]. Preston s canonical log normal distribution is the most widely accepted formalization of the relative commonness and rarity of species, but see [38] for a discussion of alternative schemes. When species counts are plotted on linear axes, the distribution is unimodal and right skewed with an ....

[Article contains additional citation context not shown here]

R. M. May. Patterns of species abundance and diversity. In M. L. Cody and J. M. Diamond, editors, Ecology and Evolution of Communities, pages 81--120. Harvard University Press, Cambridge, MA, 1975.

....market shares, of which constant shares is a special case, will produce a power law distribution of revenue. 12 If the geometric market division process is not realized precisely, then the distribution will be a slightly modified geometric distribution called the log series distribution (May, 1983). Power laws commonly are found in economics. Steindl (1965) found that the relationship between a firm s size and it s rank could be approximated by a power law. Simon (1955) has shown that a power law is an implication of a model in which the growth rate of firms is independent of size (Gibrat s ....

May, R. M. (1983). Patterns of species abundance and diversity. In Patrick, R., editor, Diversity: Benchmark Papers in Ecology, pages 340--379.

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May, R.M. ( 1975) Patterns of species abundance and diversity, in M.L. Cody and J.M. Dia ond ( gy and Evo lutio n o f Co mmunities , Harvard University Press, Ca bridge MA, pp. 81-120.

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