Results 271 to 280 of about 190,405 (306)
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Niche Width and Niche Overlap: A Method for Measuring Them
Ecology, 1972Suppose r different animal species are found in some or all of c different habitats. Observations on the numbers of occurrences of the animals in the habitats can be tabulated in an r ° c table. The overall "diversity" of the table, HT say, is defined as Brillouin's information measure with the r ° c table's cell frequencies of the different "symbols."
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Shuffled Sticks: On Calculating Nonrandom Niche Overlaps
The American Naturalist, 1986An analytical method is presented for detecting nonrandom niche displacement that might result from competition by examining the degree to which niche overlap is minimized along a single niche dimension. Species' utilization spectra for different resources are viewed as intervals, or "sticks," arranged over a finite linear resource continuum.
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Distance and cosine measures of niche overlap
Social Networks, 2001Abstract Niche overlap is increasingly used as a way of measuring the intensity of interorganizational competition. This paper examines and compares various distance and cosine measures of niche overlap. The analysis in this paper shows that Euclidean distance applied to the raw data as well as to transformed data is not an appropriate measure of ...
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Likelihood Measures of Niche Breadth and Overlap
Ecology, 1979Currently used niche measures of overlap and breadth are shown to be inappropriate for analyzing field data. Previously proposed measures assume resources are equally available, but this assumption is unwarranted in field studies. Comparisons of different measures of either breadth or overlap are also not valid. A measure of niche breadth is derived by
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Competition and the niche; limiting similarity and differential niche overlap
1984In the previous chapter, competition was shown to influence both the size of the niche and the degree of niche overlap between species. The ideas discussed there lead to an interesting question. If no two species can occupy the same niche indefinitely when resources are limiting, then how similar can two species be and still coexist?
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An evolving view on biogeochemical cycling of iron
Nature Reviews Microbiology, 2021Andreas Kappler +2 more
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Long COVID: major findings, mechanisms and recommendations
Nature Reviews Microbiology, 2023Hannah Davis
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