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Geographic patterns of predator niche breadth and prey species richness
Ecological Research, 2015Abstract Most dietary studies on predator species available in the literature are based on single populations, with no meta‐analysis across populations in distinct areas of their range. Here, we performed a systematic review of the available data on the food habits of barn owl ( Tyto alba
MILANA, GIULIANO +4 more
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DIFFERENCES IN NICHE BREADTH AMONG SOME TEUTHIVOROUS MESOPELAGIC MARINE MAMMALS
Marine Mammal Science, 2003An important issue in ecology is how species which are members of the same ecological guild differ in their use of resources (Emlen 1973, pp. 175–178). Species may use particular resources in different proportions, or, more generally, employ more or fewer resource types, so having relatively wide and narrow niche breadths, respectively.
Whitehead, H., MacLeod, C., Rodhouse, P.
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Evolution of Niche Breadth in Populations of Ants
The American Naturalist, 1979Both the mean forager size and the variability in forager size within colonies of ants are positively correlated with niche breadth on two dimensions-size of foraging area and diet. In colonies that feed on seeds, absolute size of the foragers is related to the size of seeds taken; in colonies that feed on insects, absolute size of the foragers is ...
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Algebraic and Graphical Relationships Among Niche Breadth Measures
Ecology, 1981Five measures of niche breadth (Hurlbert's, Levins', Petraitis', and Schoener's) can be described by a single function similar to Hill's function of diversity. Choice of which measure to used depends on how the experimenter wishes to weight the data. Utilization of a resource divided by the availability of that resource can be viewed as the tangent of ...
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Niche Breadth as a Function of Social Dominance
The American Naturalist, 1974If one species is socially dominant to another, the subordinate usually narrows its niche when they occur together. When one species is dominant in some circumstances and a second in others, both narrow their niches when together. Subordinates usually have a larger fundamental niche than their dominants.
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Measurement of trophic niche breadth using occurrence frequencies
Journal of Fish Biology, 1991A modification of Gladfelter‐Johnson's index to measure trophic niche breadth using occurrence frequencies is proposed, in order to make it more sensitive to different resource use patterns. The new index ranges from 0 to 1 and measures niche breadth in a guild context.
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Area Size and Niche Breadth at Higher Latitudes
1975Fewer plant and animal species, lower production, and a slower rate of decomposition have been considered aspects of the higher latitudes. An increase in niche breadth (Klopfer and MacArthur, 1960; MacArthur, 1969; Willson, 1969) and a decrease in the degree of specialization (Scriber, 1973) have also been observed.
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Evolution of realized niche breadth diversity driven by community dynamics
Ecology LettersAbstract Why many herbivorous insects are host plant specialists, with non‐negligible exceptions, is a conundrum of evolutionary biology, especially because the host plants are not necessarily optimal larval diets. Here, I present a novel model of host plant preference evolution of two insect species.
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