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Latitudinal gradient in niche breadth of brachyuran crabs
Global Ecology and Biogeography, 2015AbstractAimNiche breadth has long been hypothesized to decrease at low latitudes and contribute to global patterns of species diversity. Range size, phylogenetic relatedness and body size also have hypothesized relationships with both latitude and niche breadth, which may further affect niche breadth patterns. Existing terrestrial data are inconclusive
Papacostas, Katherine J. +1 more
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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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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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Niche breadth in Bryozoa as a test of competition theory
Nature, 1975COMPETITION theory predicts that intraspecific and interspecific competition should often have opposite effects on the use of resources by a population, the former increasing, the latter decreasing, the range of resource actually used1,2. Field data supporting these predictions are well known for the interspecific case3,4 but are scarce for the ...
R. J. O'CONNOR, P. J. S. BOADEN, R. SEED
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[Niche breadth of Gymnosporangium haraeanum].
Ying yong sheng tai xue bao = The journal of applied ecology, 2002The resistant difference among different main pear cultivars in Anhui Province to pear rust caused by Gymnosporangium haraeanum was significant. According to disease index and diseased leaves of susceptible cultivars, the niche breadths of hosts were 0.7555 and 0.7951, respectively.
Y, Li, H, Cheng
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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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Niche Breadth Calculation Based on Discriminant Analysis
Ecology, 1982Pyke, G. H. 1981. Optimal nectar production in a hummingbird-pollinated plant. Theoretical Population Biology 20:326-343. Reincke, D. C., and W. L. Bloom. 1979. Pollen dispersal in natural populations: a method for tracking individual grains. Systematic Botany 4:223-229. Schaal, B. A. 1975.
Beatrice Van Horne, R. Glenn Ford
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Niche Breadth, Resource Availability, and Inference
Ecology, 1982Measures of niche breadth are discussed in relation to the distance between the resource use distribution and the resource availability distribution. Methods are developed for comparing breadth measures, testing a breadth measure equal to a given value, and for estimating confidence intervals.
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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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